Academic literature on the topic 'In-Situ-Test methods'
Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles
Consult the lists of relevant articles, books, theses, conference reports, and other scholarly sources on the topic 'In-Situ-Test methods.'
Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.
You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.
Journal articles on the topic "In-Situ-Test methods"
1
Naser, Kabashi. "Evaluation the Compressive Strength in Concrete Structures Using the In-situ Test Methods." Journal of Civil Engineering and Environmental Sciences 2, no. 1 (2015): 001–4. https://doi.org/10.17352/2455-488x.000007.
Full textAbstract:
The new concrete Standards give rules for in-situ checking if the hardened concrete in structure achieved the designed compressive strength according the request the class of concrete. Different concrete elements in structure request the different access during the examinations and different analytical analysis. Using the different examination methods will be the main aim on evaluations of concrete strength, always in comparing with requested design class. Core testing and other nondestructive methods assessing strength of surface concrete are generally less reliable than cores, but less damaged will used for final evaluations.
2
Li, Qiang, You Hong Sun, and Xin Fang. "In Situ Thermal Response Test Methods And Practices." Advanced Materials Research 347-353 (October 2011): 3087–92. http://dx.doi.org/10.4028/www.scientific.net/amr.347-353.3087.
Full textAbstract:
Abstract. As a high efficiency, low consumption and clean energy, ground source heat pump technology has been pay more and more attention, the number of installation of system is growing rapidly. However, the use of geothermal resources is still extensive at this stage. Effective methods are pure in obtaining thermal physical parameters of geothermal wells around. In-situ thermal response testing is close to the real use of heat pumps, when injecting in or extracting heat from geothermal wells, the testing equipment will collect data, and then thermal physical parameters will be accurately calculate. This paper introduce a thermal response testing equipment, the equipment will add a constant cold or heat to geothermal well, circulating heat flow and pressure data is collected as well as temperature. And then thermal physical parameters of formation and heat exchanging performance are calculated.
3
Tang, Yan Chun, Gao Tou Meng, and Ji Chang Gong. "Study on Consolidation Coefficient by Different Test Methods." Advanced Materials Research 308-310 (August 2011): 1778–81. http://dx.doi.org/10.4028/www.scientific.net/amr.308-310.1778.
Full textAbstract:
Through indoor consolidation test and CPTU model test and CPTU in-situ test, the soil consolidation coefficient has been studied. Compared with the consolidation coefficient by indoor test equipment and CPTU, because in-situ test has been made by CPTU, but in indoor consolidation test the error caused by the disturbance and little size of clay soil sample has been existed, the soil consolidation coefficient by CPTU can reflected the soil consolidation characteristics more accurate than by indoor consolidation test. Compared with the consolidation coefficient by remolded clay soil of CPTU model test and the natural and un-disturbed clay soil of CPTU in-situ test on CPTU application research project on Pearl River Delta, the dissipation speed of excess pore pressure in CPTU model test is faster than in CPTU in-situ test; the horizontal consolidation coefficient value of clay soil by CPTU model test and CPTU in-situ test is close in the same magnitude order. The test result by CPTU model test is close to the result by CPTU in-situ test. The achieved result can provide a foundation for further study for soil consolidation coefficient by CPTU.
4
Amasaki, Shoji, Kazuhiro Kuzume, and Toyoaki Miyagawa. "Diagnosing in Situ Concrete by Some Non-Destructive Test Methods." Concrete Research and Technology 5, no. 1 (1994): 15–22. http://dx.doi.org/10.3151/crt1990.5.1_15.
Full text
5
Li, Zhao Yan, Yu Run Li, and Long Wei Chen. "In Situ Test Methods in Bachu-Jiashi Earthquake Liquefied Evaluation." Applied Mechanics and Materials 166-169 (May 2012): 2128–31. http://dx.doi.org/10.4028/www.scientific.net/amm.166-169.2128.
Full textAbstract:
The serious soil liquefaction phenomenon in Bachu-Jiashi earthquake on 24th February, 2003, which is the most prominent phenomena of sand liquefaction since the Tangshan Great Earthquake in 1976. Based on the earthquake liquefied investigation, inspect SPT and CPT applicability in situ tests. The results show that our country SPT specification and CPT specification of non-liquefied sites evaluation rate is higher than liquefied sites evaluation success rate, the liquefied sites evaluation rate are 88% and 88% respectively, but for liquefied sites evaluation rate are 38% and 55%. The result is tends to danger and the reason need further investigation, so establish a suitable liquefied prediction method should be to the future work in the local area.
6
Glaser, Steven D., and Riley M. Chung. "Estimation of Liquefaction Potential by in Situ Methods." Earthquake Spectra 11, no. 3 (1995): 431–55. http://dx.doi.org/10.1193/1.1585822.
Full textAbstract:
This report examines the state-of-the-art of in situ methods of estimating liquefaction potential in sands. In situ methods are especially important since “undisturbed” samples of loose sand for laboratory testing are virtually unobtainable. Various penetration test methods are examined, such as the SPT, DMT, and the CPT and variants. These methods are completely empirical in nature, and have worked well to date. The current state-of-practice is an SPT-based method. Intrusive, seismic-based tests are also examined: the cross-hole, down-hole tests, and down-hole logger. The seismic velocity-based predictors have a stronger physical basis than the penetration test-based estimation methods, but need a larger database. A non-intrusive test, the Spectral Analysis of Surface Waves technique, seems especially suited for examining sites of large areal extent.
7
Abdel Rahim, Khalid Abdel Naser. "Evaluating Concrete Quality using Nondestructive In-situ Testing Methods." Revista Tecnología y Ciencia, no. 36 (October 10, 2019): 22–40. http://dx.doi.org/10.33414/rtyc.36.22-40.2019.
Full textAbstract:
This manuscript investigate the quality of concrete using non-destructive in-situ testing.The in-situ testing is a process by which different test are carried out such as rebound hammer, ultrasonic pulse veloc-ity, initial surface absorption test and fig air, to determine thein-situ strength, durability and deterioration, air permeability, concrete quality control andperformance. Additionally, the quality of concrete was researched using test methods with experimental results. Moreover, this research has found that (1) the increase in w/c ra-tioleads to a decrease in compressive strength and ultrasonic pulse velocity. Thus, lower w/cratio gives a bet-ter concrete strength in terms of quality, (2) the quicker the ultrasonic pulse travels through concrete indicates that the concrete is denser, therefore, better quality, (3) the lower initial surface absorption value indicates a better concrete with respect to porosity and (4) the w/c ratio plays an important role in the strength and per-meability of concrete.
8
Robertson, P. K. "In situ testing and its application to foundation engineering." Canadian Geotechnical Journal 23, no. 4 (1986): 573–94. http://dx.doi.org/10.1139/t86-086.
Full textAbstract:
The status of in situ testing and its application to foundation engineering are presented and discussed. The in situ test methods are discussed within the framework of three groups: logging, specific, and combined test methods. The major logging test methods discussed are standard penetration test (SPT), cone penetration test (CPT), and the flat plate dilatometer test (DMT). The major specific test methods discussed are the prebored pressuremeter test (PMT), the self-bored pressuremeter test (SBPMT), and the screw plate load test (SPLT). Discussion is also presented on recent tests that combine features of logging tests (using the CPT) and specific tests (e.g. the seismic, the electrical resistivity/dielectric, and the lateral stress sensing cone penetration tests). A brief discussion is also presented on the applicability, as perceived by the author, of existing in situ test methods and the future of in situ testing applied to foundation engineering. Key words: in situ testing, foundation engineering, penetration testing, pressuremeter.
9
Petkovšek, Ana, Matej Maček, and Jasna Smolar. "TESTING METHODS FOR MECHANICALLY IMPROVED SOILS: RELIABILITY AND VALIDITY." Acta Polytechnica CTU Proceedings 10 (October 15, 2017): 16. http://dx.doi.org/10.14311/app.2017.10.0016.
Full textAbstract:
A possibility of in-situ mechanical improvement for reducing the liquefaction potential of silty sands was investigated by using three different techniques: Vibratory Roller Compaction, Rapid Impact Compaction (RIC) and Soil Mixing. Material properties at all test sites were investigated before and after improvement with the laboratory and the in situ tests (CPT, SDMT, DPSH B, static and dynamic load plate test, geohydraulic tests). Correlation between the results obtained by different test methods gave inconclusive answers.
10
Chen, De Fang. "Discussion on the Bearing Capacity Determination Methods of Shallow Foundation in Shanghai Region." Applied Mechanics and Materials 339 (July 2013): 623–27. http://dx.doi.org/10.4028/www.scientific.net/amm.339.623.
Full textAbstract:
Representative engineering geological data of Shanghai were collected in this article for analyzes differences between shallow land basic bearing capacity of soil between test values and situ test values. Microstructure of soil geographical is analysis by conventional physical and mechanical tests laboratory. Collect on-site load plate test results of Shanghai shallow foundation soil, and take inversion analysis of the carrying capacity and regression analysis to calculate the bearing capacity of foundation soil test values and in situ values rationality, do a preliminary study on the current bearing capacity calculation and selection.
Dissertations / Theses on the topic "In-Situ-Test methods"
1
Mullen, W. Grigg. "An evaluation of the utility of four in-situ test methods for transmission line foundation design /." This resource online, 1991. http://scholar.lib.vt.edu/theses/available/etd-07112007-092850/.
Full text
2
Mullen, W. G. "An evaluation of the utility of four in-situ test methods for transmission line foundation design." Diss., Virginia Tech, 1991. http://hdl.handle.net/10919/38760.
Full text
3
Fantou, Alexandre. "Étude multi-physique et multi-échelle de la réaction d'hydratation du sulfate de calcium hémihydraté." Electronic Thesis or Diss., Lyon, INSA, 2023. http://www.theses.fr/2023ISAL0099.
Full textAbstract:
En raison de leur capacité de prise, les liants hydrauliques sont utilisés à des fins très variées (e.g., matériaux de construction, substituts osseux, ...). La réaction de prise est toujours initiée par le mélange d'une ou plusieurs poudres fines avec une solution aqueuse. La dissolution des poudres réactives initiales entraîne la formation d'une pâte visqueuse, dont les propriétés évoluent avec le temps pour former une céramique poreuse monolithique par la nucléation et la précipitation de phase(s) plus stable(s). Dans le cadre de cette thèse, le plâtre CaSO4·2H2O obtenu par la réaction d'hydratation du sulfate de calcium hémihydraté CaSO4·0,5H2O est étudié dans des conditions standards (e.g., rapport massique liquide/solide, température et pression), afin de développer des techniques de caractérisation multi-physiques et multi-échelles in-situ et ex-situ pour suivre l'évolution de:- la composition des phases (réaction de dissolution et de précipitation) à l'aide de mesures calorimétriques, de la de la diffractométrie des rayons X et de la spectrophotométrie infrarouge à transformée de Fourier;- la microstructure à l'aide de la microscopie électronique à balayage et de la microtomographie aux rayons X;- les propriétés mécaniques en utilisant la mesure de vitesse de propagation des ultrasons, l'analyse mécanique dynamique en cisaillement et en compression et le test de résistance en compression. Ce panel de techniques a permis de suivre et de corréler les différentes transitions physiques survenant au cours de la réaction de prise et ainsi de dresser un portrait global des phénomènes physiques mis en jeu<br>Because of their setting ability, hydraulic binders are used for a wide variety of applications (e.g., construction materials, bone substitutes, ...). The setting reaction is always initiated by mixing one or several fine powders with an aqueous solution. The dissolution of the initial reactive powders results in the formation of a viscous paste, whose properties evolve with time to form a porous monolithic ceramic through the nucleation and precipitation of more stable phase(s). In this thesis, gypsum plaster CaSO4·2H2O obtained by the hydration reaction of calcium sulfate hemihydrate CaSO4·0,5H2O is studied under standard conditions (e.g., liquid/solid mass ratio, temperature and pressure), in order to develop multi-physic and multi-scale characterization techniques in-situ and ex-situ to monitor the evolution of:- the phase composition (rate of dissolution and precipitation) using calorimetric measurements, X-ray diffraction and Fourier-transform infrared spectrophotometry techniques;- the microstructure using scanning electron microscopy and X-ray microtomography;- the mechanical properties using ultrasonic propagation velocity measurement, shear and compressive dynamic mechanical analysis and compressive strength testing. This panel of techniques enabled to monitor and to correlate the various physical transitions occurring during the setting reaction, and thus to draw a global picture of the on-going phenomena
4
Bouguerra, Hafid. "Prévision du potentiel de liquéfaction des sites sableux à l'aide d'appareillages in-situ." Grenoble INPG, 1997. http://www.theses.fr/1997INPG0003.
Full textAbstract:
Le travail de recherche propose par de l'auteur se situe dans le domaine de la geomecanique. La prevision du risque de liquefaction des sables lors de seismes reste un probleme majeur pour tous les projets de genie civil dans les zones a haute sismicite. Le but de nos recherches est de developper des methodes de prevision a partir d'appareillages de reconnaissance en place plus precis et plus sophistiques que le spt, tels que le penetrometre statique, le pressiometre et le piezocone. Notre demarche implique des etudes en laboratoire dans des massifs de sol reconstitues dans des conditions bien controlees et des etudes sur le terrain, sur des sites potentiellement liquefiables. Dans la premiere partie, cette demarche s'articule autour de trois volets : la determination par des essais triaxiaux cycliques non-draines de la resistance a la liquefaction des sables utilises dans nos recherches, l'etude de la reponse des appareillages de reconnaissance en place, notamment celle du piezocone, dans des massifs de sable reconstitues dans la chambre d'etalonnage permettant de controler les conditions d'essais, l'etude de la reponse de ces memes appareillages sur des sites connus pour avoir liquefie ou potentiellement liquefiables. La synthese de ces trois permettra de proposer de nouvelles methodes de prevision de la liquefaction. Dans la seconde partie, l'interpretation des reponses de ces appareillages sur des sites, en vue de la prevision a la liquefaction a l'aide des methodes proposees. Enfin, il est interessant d'elaborer des correlations pour le sable d'hostun rf, vue la base de donnees de resultats penetrometriques et pressiometriques sur ce sable en chambre d'etalonnage et les confronter avec les recherches menees par ailleurs. Ces correlations peuvent ainsi deboucher sur des regles utilisables par les praticiens.
5
Guillon, Théophile. "Comportement hydromécanique des argilites du Callovo-Oxfordien lors de cycles de désaturation-resaturation." Thesis, Vandoeuvre-les-Nancy, INPL, 2011. http://www.theses.fr/2011INPL101N/document.
Full textAbstract:
Les propriétés des argilites du Callovo-Oxfordien les désignent comme une barrière naturelle sûre pour le stockage de déchets radioactifs. Afin d’optimiser la prédiction de leur comportement, leur réponse à diverses sollicitations à court et long termes est étudiée. Notamment, lors de la phase d’exploitation, l’air ventilé dans les galeries n’est pas à l’équilibre hydrique avec la roche et peut perturber ses propriétés hydromécaniques (HM). Il semble alors essentiel de caractériser la réponse HM de la roche à des sollicitations hydriques.La démarche adoptée consiste à proposer un modèle physique adéquat, sur la base d’essais au laboratoire. L’essai de séchage est retenu puisqu’il permet d’étudier la réponse des échantillons en conditions non-saturées. A partir des résultats HM, un modèle élastique 2D isotrope est proposé, puis est élevé à la 3D avec un module de Young isotrope transverse. Ensuite, les données expérimentales servent à estimer certains paramètres poroélastiques et de transfert du modèle. Cette étape est accomplie par procédure inverse (minimisation de l’erreur mesures-calculs). Enfin, une modélisation 2D du comportement in situ est proposée, et compare les prédictions de modèles plastique isotrope et élastique isotrope transverse.Les simulations d’essais au laboratoire reproduisent assez bien les données expérimentales. Pour la modélisation in situ, une bonne corrélation est obtenue entre les prédictions et les mesures, et ce sans ajustement préalable des paramètres. Toutefois, le modèle souligne une influence limitée de la plasticité à l’échelle du laboratoire, alors que les phénomènes dissipatifs sont marqués in situ. Les modélisations 3D au laboratoire ne donnent pas de résultats plus fins qu’en 2D, mais reproduisent plus de données expérimentales (variations de masse, déformations axiales et latérales). De plus, injecter plusieurs types de données dans la formulation inverse permet d’améliorer la précision de l’algorithme. Par ailleurs, une meilleure stabilité de l’algorithme est obtenue en adoptant une convergence en deux étapes (simplex, puis méthode de type gradient). Les estimations numériques des paramètres corroborent les mesures expérimentales obtenues par ailleurs<br>The Callovo-Oxfordian claystones’ properties make them reliable as a geological barrier for the confinement of radioactive wastes. In order to optimally predict their behavior, how they respond to various short and long terms loadings has to be studied. Particularly during the exploitation phase, air is continuously ventilated throughout the galleries. The climatic properties of this air are not balanced with those of the rock, and may perturb its hydromechanical (HM) attributes. Thus, assessing the HM response of the rock under hydric loading seems to be a priority.This dissertation begins with laboratory tests to propose an appropriate physical model. Drying tests were studied as they focus on the HM response of samples undergoing hydric loadings. A first 2D isotropic model is proposed, and then enhanced to 3D by considering a transversely isotropic Young modulus. Secondly, experimental results provide relevant data to estimate poroelastic and transport parameters involved in the model. Estimation is achieved according to an inverse procedure, which minimizes the error between measurements and model predictions. Finally, a real-size test is simulated using 2D models: an isotropic plastic one and a transversely isotropic elastic one.Model predictions reproduce well the laboratory tests data. When simulating the in situ behavior, a rather good agreement is obtained between the numerical and experimental results (although using the parameters estimated at the laboratory scale). However, the model highlights a limited influence of plasticity in the laboratory tests, while dissipative phenomena obviously occur in situ. 3D laboratory simulations do not improve the precision of 2D results, but reproduce more experimental data (mass variations, axial and lateral strains). Moreover, the inversion process is more efficient when ran over various kinds of data. Furthermore, stability of the algorithm is improved when adopting a two-phase convergence (simplex, followed by a gradient-like method). Numerical estimates of the parameters are in agreement with the direct experimental measurements obtained through other tests
6
Zaragoci, Jean-François. "Simulation numérique directe multiphasique de la déformation d’un alliage Al-Cu à l’état pâteux – Comparaison avec des observations par tomographie aux rayons X in situ en temps réel." Thesis, Paris, ENMP, 2012. http://www.theses.fr/2012ENMP0088/document.
Full textAbstract:
La fissuration à chaud est un défaut majeur rencontré en solidification des alliages d'aluminium. Elle est liée à l'incapacité du liquide de s'écouler dans les zones où des porosités sont présentes, ne permettant pas de les refermer avant qu'elles gagnent en volume. Pour comprendre la fissuration à chaud, il est crucial de développer nos connaissances du comportement mécanique de la zone pâteuse. Pour cela, il est très utile d'effectuer des expériences de microtomographie aux rayons X et des simulations mécaniques sur des volumes élémentaires représentatifs. Dans cette thèse, nous proposons de coupler les deux approches en initialisant une simulation par éléments finis grâce à des données de microtomographie issues d'un test de traction isotherme d'un alliage d'aluminium-cuivre à l'état pâteux. Cette approche originale nous donne directement accès à la réalité expérimentale et permet des comparaisons des évolutions numérique et expérimentale de l'éprouvette. Nous expliquons dans un premier temps comment obtenir la représentation numérique à l'aide de l'algorithme des marching cubes et de la méthode d'immersion de volume. Nous présentons ensuite notre modèle numérique qui s'appuie sur une résolution monolithique des équations de Stokes. Une fois le champ de vitesse obtenu dans l'ensemble des phases solide, liquide et gazeuse, nous utilisons une méthode level set dans un formalisme eulérien afin de faire évoluer la morphologie de notre échantillon numérique. Malgré la simplicité du modèle, les résultats expérimentaux et numériques montrent un accord raisonnable en ce qui concerne la propagation de l'air à l'intérieur de l'échantillon<br>Hot tearing is a major defect arising during solidification of aluminium alloys. This defect is associated with the inability of liquid to feed areas where voids have started to appear, not allowing to heal small defects before they grow bigger. To understand hot tearing, it is mandatory to develop a good knowledge of the semi-solid mechanical behaviour. It is thus very useful to carry out X-ray microtomographies experiments and mechanical simulations on representative elementary volumes. In this work, we couple the both approaches by initialising a finite element simulation with the help of microtomography data obtained during an isothermal tensile testing of an aluminium-copper alloy in the mushy state. This innovative approach gives a direct access to the experimental reality and allows comparisons of numerical and experimental evolutions of the sample. We explain in a first time how to get the numerical representation thanks to a marching cubes algorithm and the immersed volume method. Then, we present our numerical model for which we solve the Stokes equations in a monolithic way. Once the velocity computed in all the solid, liquid and gaseous phases, we use a level set method in a Eulerian formalism to obtain the morphological evolution of our numerical sample. Despite the model simplicity, numerical and experimental results show a reasonable agreement concerning the air propagation inside the sample
7
Ahmad, Naveed. "Measurement of energy performance : Analysis of QUB method." Thesis, Lyon, 2020. http://www.theses.fr/2020LYSEI051.
Full textAbstract:
QUB est une méthode d'essai de caractérisation thermique in situ dynamique qui a le potentiel d'être menée sur une courte durée d'une à deux nuits. La robustesse de la méthode QUB avec l'incertitude du niveau de puissance (pendant la phase de chauffage QUB), l'incertitude du coefficient de transfert de chaleur global à l'état d'équilibre, H_ref, et les températures extérieures en fonction des saisons doivent être établies pour les bâtiments réels. Un modèle dynamique d'état-espace est développé dans cette thèse pour simuler des expériences QUB. La modélisation espace-état consiste à générer un circuit thermique pour chaque composant du bâtiment (murs, fenestration, système de ventilation, etc.). Les circuits thermiques sont ensuite assemblés pour générer un seul circuit pour l'ensemble du bâtiment. Le modèle d'espace d'état développé, est validé à l'aide des caractéristiques thermiques et des données mesurées d'une maison à grande échelle (la maison jumelle) fournies par l'annexe 58 de l'IEA EBC. Les simulations numériques des expériences QUB sur une maison montrent que la méthode ne présente que de légères variations avec une incertitude de puissance; par exemple, une erreur de 30% de la puissance optimale peut provoquer une erreur à moins de 3% de la valeur de référence. Une analyse d'erreur a posteriori est effectuée en simulant des expériences QUB dans des situations où l'enveloppe réelle a des caractéristiques différentes de celles supposées dans la conception de l'expérience pour la méthode QUB. Ces résultats sont ensuite comparés à des erreurs a priori, une situation dans laquelle des expériences QUB sont effectuées avec la connaissance de l'enveloppe réelle. L'analyse des erreurs montre qu'avec une erreur de 50% du coefficient de transfert de chaleur global (c'est-à-dire une situation d'isolation de paroi manquante), la méthode QUB entraîne une erreur accrue de seulement 3¬¬%. La précision de la méthode QUB a également été testée avec la variation du rayonnement solaire. Les résultats QUB les jours nuageux montrent une variation moindre par rapport aux jours ensoleillés. Il a été démontré que le transfert de chaleur des radiations solaires retardées pénétrant à travers les murs du bâtiment a un effet sur l'évolution de la température au cours de l'expérience QUB. Cela peut entraîner une augmentation de l'erreur dans la méthode QUB. Les expériences QUB sont simulées pendant l'été et l'hiver pour déterminer l'impact des saisons sur la précision de la méthode. La saison d'hiver montre des résultats plus robustes que les mois d'été. Les mois d'été montrent une plus grande variation des résultats. Il est vérifié que la grande variation est due à une petite différence de température entre les conditions intérieures et extérieures pendant certaines des nuits d'été. Les expériences en saison estivale peuvent être améliorées en augmentant la température de consigne avant l'expérience QUB<br>QUB is a dynamic in-situ thermal characterization test method that has the potential to be conducted in a short duration of one to two nights. The robustness of QUB method with uncertainty in power level (during QUB heating phase), uncertainty in overall heat transfer coefficient at steady state, H_ref, and the outdoor temperatures a function of seasons needs to be established for real buildings.A dynamic state-space model is developed in this thesis to simulate QUB experiments. The state-space modelling involves generating a thermal circuit for each component of the building (walls, fenestration, ventilation system, etc.). The thermal circuits are then assembled to generate a single circuit for the entire building. The state-space model developed, is validated using thermal characteristics and measured data of a full-scale house (the twin house) provided by IEA EBC Annex 58. The numerical simulations of the QUB experiments on a house show that the method has only slight variation with uncertainty in power; for example, 30% error in optimum power can cause an error within 3 % of the reference value. A posteriori error analysis is performed by simulating QUB experiments in situations in which the real envelope has different characteristics than those assumed in the design of the experiment for QUB method. These results are then compared with a priori errors, a situation in which QUB experiments are performed with the knowledge of the real envelope. The error analysis shows that with 50 % error in the overall heat transfer coefficient (i.e. missing wall insulation situation), the QUB method results in an increased error of only 3¬¬ %. The precision of QUB method was tested also with the variation of solar radiation. QUB results on cloudy days show lesser variation as compared to sunny days. It was shown that the heat transfer from the delayed solar radiations entering through the walls of the building has an effect on the temperature evolution during the QUB experiment. This can lead to an increased error in QUB method. The QUB experiments are simulated during summer and winter to determine the impact of seasons on the accuracy of the method. The winter season shows more robust results as compared to summer months. The summer months show larger variation of results. It is verified that the large variation are due to small temperature difference between indoor and outdoor conditions during some of the summer nights. The experiments in summer season can be improved by increasing the set point temperature before the QUB experiment
8
Verguin, Dulieux Pascale. "Industrialisation d'une méthode de localisation de défauts sur circuits intégrés par cristaux liquides." Grenoble INPG, 1994. http://www.theses.fr/1994INPG0177.
Full textAbstract:
L'evolution drastique de la technologie de fabrication des circuits integres rend difficile l'utilisation des outils d'analyse classiques. Parmi ces derniers, les cristaux liquides permettent neanmoins la localisation d'un defaut physique ou electrique sur circuit integre. Cette etude a pour objet de preciser dans quelles limites et sous quelles conditions la methode de test par cristaux liquides reste viable dans un environnement industriel. Comparee aux outils d'analyse actuellement disponibles, cette methode, qui autorise a la fois la detection de points chauds et la visualisation en contraste de potentiel d'un circuit en fonctionnement, revele un taux de couverture de defauts eleve. Sa limite d'utilisation en frequence en fait un outil complementaire du test par faisceau d'electrons. Mais la mise en uvre des cristaux liquides souleve les problemes de la fiabilite et de la reproductibilite des manipulations. Ainsi, la presence d'un relief en surface du circuit sous test pourra nuire a l'interpretation. De meme, les etapes de preparation de l'experience pourront mettre en peril le circuit, souvent unique, presentant la defaillance. Aussi s'efforcera-t-on au cours de ce travail de mettre en place des procedes bien maitrises qui minimiseront les risques d'erreurs. La methode de test par cristaux liquides est suffisamment attractive pour que l'on s'attache a la rendre fiable. Elle permet en effet le test in situ des composants defaillants, ce qui evite de reproduire artificiellement les conditions d'apparition du defaut au risque de le faire disparaitre, et qui autorise l'utilisation du programme de test non modifie d'une carte electronique complete. C'est ce qui fait la particularite de la methode par rapport aux autres disponibles actuellement. C'est aussi l'argument qui a motive notre choix dans un contexte de fabrication de cartes electroniques complexes
9
Potier, Bruno. "Détermination des champs des températures et des concentrations dans une flamme de charbon pulvérisé de taille semi-industrielle : application au four pilote 1 mw du cerchar." Orléans, 1986. http://www.theses.fr/1986ORLE0012.
Full textAbstract:
Développement d'une méthode optique de mesure des températures, basée sur l'émission et l'absorption du rayonnement thermique dans le proche infrarouge, et permettant de déterminer la température en un point. Parallèlement aux champs des températures cette méthode permet d'accéder aux champs de concentrations relatives en particules et en dioxyde de carbone et fournir des renseignements sur les valeurs in situ de plusieurs paramètres nécessaires à la modélisation des transferts thermiques.
10
Chien-TaiShih and 施健泰. "The In Situ Test, Analysis and Application of Seismic Retrofitting Methods of Typical School Buildings." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/34372168386854158219.
Full textAbstract:
博士<br>國立成功大學<br>土木工程學系<br>102<br>The seismic resistance capacities of typical I-shape low-rise RC school buildings are limited along the parallel-corridor direction; this phenomenon is crucially non-negligible in terms of seismic retrofitting design. To truly realize details of construction as well as retrofitting benefits, the in-situ push-over tests will be a better strategy to prevent ‘downscaling effect’ and obtain the most direct-and -reliable retrofitting verification. In this study, both in-situ push-over experiments and their corresponding numerical (ABAQUS) simulations are used to investigate the differences of structural behaviors before and after retrofitting. From the observations in this study, it is recommended to add ‘construction-time- modulating factor’ as well as using confined concrete value ( value depends on the reset of stirrups) to carry out push-over analysis. The comparison of each experimental specimen’s seismic capacity as well as their analytical results show that RC jacketing columns, the steel channel adhered to the existing RC columns of external steel-framing system, and column frame retrofitted specimens have both precise prediction and effectively improved strength and ductility when analyzing force behavior of columns and its failure mode, and the two results can provide low-rise RC school buildings with available reinforcement methods: the former one is applicable to existing school buildings with smaller , whereas the latter one is to larger buildings.
Books on the topic "In-Situ-Test methods"
1
Liaqat, Ali, Changsha li gong da xue., American Society of Civil Engineers. Geo-Institute., and GeoHunan International Conference on Challenges and Recent Advances in Pavement Technologies and Transportation Geotechnics (2009 : Changsha, Hunan Sheng, China), eds. Recent advancement in soil behavior, in situ test methods, pile foundations, and tunneling: Selected papers from the 2009 GeoHunan International Conference, August 3-6, 2009, Changsha, Hunan, China. American Society of Civil Engineers, 2009.
Find full text
2
Liaqat, Ali, Changsha li gong da xue., American Society of Civil Engineers. Geo-Institute., and GeoHunan International Conference on Challenges and Recent Advances in Pavement Technologies and Transportation Geotechnics (2009 : Changsha, Hunan Sheng, China), eds. Recent advancement in soil behavior, in situ test methods, pile foundations, and tunneling: Selected papers from the 2009 GeoHunan International Conference, August 3-6, 2009, Changsha, Hunan, China. American Society of Civil Engineers, 2009.
Find full text
3
Krumme, Mary Luise. Development of aquifer microcosms and in situ methods to test the fate and function of pollutant-degrading microorganisms. 1993.
Find full text
4
Recent advancement in soil behavior, in situ test methods, pile foundations, and tunneling: Selected papers from the 2009 GeoHunan International Conference, August 3-6, 2009, Changsha, Hunan, China. American Society of Civil Engineers, 2009.
Find full text
5
Recent advancement in soil behavior, in situ test methods, pile foundations, and tunneling: Selected papers from the 2009 GeoHunan International Conference, August 3-6, 2009, Changsha, Hunan, China. American Society of Civil Engineers, 2009.
Find full text
6
Lutenegger, Alan J. In Situ Testing Methods in Geotechnical Engineering. Taylor & Francis Group, 2021.
Find full text
8
Lutenegger, Alan J. In Situ Testing Methods in Geotechnical Engineering. Taylor & Francis Group, 2021.
Find full text
9
Lutenegger, Alan J. In Situ Testing Methods in Geotechnical Engineering. CRC Press LLC, 2022.
Find full textBook chapters on the topic "In-Situ-Test methods"
1
Nautiyal, Pranjal, Benjamin Boesl, and Arvind Agarwal. "Test Methods for In-Situ Mechanical Characterization." In In-situ Mechanics of Materials. Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-43320-8_3.
Full text
2
Decordier, Ilse, and Micheline Kirsch-Volders. "Fluorescence In Situ Hybridization (FISH) Technique for the Micronucleus Test." In Methods in Molecular Biology. Humana Press, 2013. http://dx.doi.org/10.1007/978-1-62703-529-3_12.
Full text
3
Lutenegger, Alan J. "Dilatometer Test (DMT)." In In Situ Testing Methods in Geotechnical Engineering. CRC Press, 2021. http://dx.doi.org/10.1201/9781003002017-6.
Full text
4
Lutenegger, Alan J. "Pressuremeter Test (PMT)." In In Situ Testing Methods in Geotechnical Engineering. CRC Press, 2021. http://dx.doi.org/10.1201/9781003002017-7.
Full text
5
Lutenegger, Alan J. "Plate Load Test (PLT) and Screw Plate Load Test (SPLT)." In In Situ Testing Methods in Geotechnical Engineering. CRC Press, 2021. http://dx.doi.org/10.1201/9781003002017-9.
Full text
6
Lutenegger, Alan J. "Borehole Shear Test (BST)." In In Situ Testing Methods in Geotechnical Engineering. CRC Press, 2021. http://dx.doi.org/10.1201/9781003002017-8.
Full text
7
Lutenegger, Alan J. "Field Vane Test (FVT)." In In Situ Testing Methods in Geotechnical Engineering. CRC Press, 2021. http://dx.doi.org/10.1201/9781003002017-5.
Full text
8
Lutenegger, Alan J. "Standard Penetration Test (SPT)." In In Situ Testing Methods in Geotechnical Engineering. CRC Press, 2021. http://dx.doi.org/10.1201/9781003002017-2.
Full text
9
Lutenegger, Alan J. "Dynamic Cone Penetration Test (DCP)." In In Situ Testing Methods in Geotechnical Engineering. CRC Press, 2021. http://dx.doi.org/10.1201/9781003002017-3.
Full text
10
Weidner, Anja, Alexander Schmiedel, Mikhail Seleznev, and Horst Biermann. "Influence of Internal Defects on the Fatigue Life of Steel and Aluminum Alloys in the VHCF Range." In Multifunctional Ceramic Filter Systems for Metal Melt Filtration. Springer International Publishing, 2024. http://dx.doi.org/10.1007/978-3-031-40930-1_24.
Full textAbstract:
AbstractThis chapter concerns the influence of internal defects (i.e. nonmetallic inclusions, secondary phases and cast defects) on the fatigue lifetime of steel and aluminum alloys in the high cycle fatigue (HCF) and very high cycle fatigue (VHCF) regime. The detrimental effect of internal defects depends on multiple factors such as size, morphology, chemical composition, test temperature or position in the material. Specimens were tested after active and/or reactive melt filtration processes of the materials which served to influence the amount and size distribution of internal defects. Fatigue experiments up to 109 cycles were carried out using ultrasonic fatigue testing equipment. In addition, in situ methods, as e.g. full surface view thermography and acoustic emission (AE), were applied to study the processes of crack initiation and propagation, which finally lead to fatigue failure. Furthermore, the cyclically strained samples were subjected to fractographic analysis and the S–N-curves were discussed according to the characteristics of the crack-initiating defects. Based on these investigations, an enhanced knowledge about the correlation of internal defects on the materials’ fatigue strength enables a specific melt filtration strategy adjusted to the materials’ service conditions.
Conference papers on the topic "In-Situ-Test methods"
1
Fritz, James D. "In Situ Electrochemical Testing of Stainless Steel Surfaces." In CORROSION 2021. AMPP, 2021. https://doi.org/10.5006/c2021-16227.
Full textAbstract:
Abstract A novel approach for performing electrochemical testing on in-situ stainless steel surfaces is presented. This approach involves the use of an absorbent pad placed on the test surface to facilitate the application of standard electrochemical test methods. A detailed description of the experimental procedure is provided. The test method has the advantages of being nondestructive and can be used as a field test. Examples of the successful use of this approach for the in-situ evaluating the pitting resistance of 316L pharmaceutical tanks and for nondestructive detection of sigma phase in cast duplex stainless steel are provided. Other possible applications and limitations of the test method are discussed.
2
Nagato, Keisuke. "In-situ observations of surfaces in laser powder bed fusion." In Laser Applications Conference. Optica Publishing Group, 2024. https://doi.org/10.1364/lac.2024.lm3b.3.
Full textAbstract:
In this study, an in-situ observation of the sample surface during laser powder bed fusion (L-PBF) was performed. The parameter choices for satisfying the functional requirements of L-PBF, such as laser power, scan speed, and spot diameter, are numerous and a bottleneck is created by the long cycle time required to prototype and evaluate test pieces. To overcome this problem, we developed two methods: high-speed observation of flying particles and one-shot observation of the surface geometry. These methods shortened the evaluation times for the mechanical properties and three-dimensional structures, respectively.
3
Gavanluei, Arshad B., Joseph Wilhelmi, Paul Bunch, Matt Vaclavik, Fokion Oikonomidis, and Jenny Martin. "Comparison of Two ASTM E1820 Standard Fracture Toughness Test Methods for LAS Material in Deaerated Saltwater under Cathodic Protection." In CONFERENCE 2024. AMPP, 2024. https://doi.org/10.5006/c2024-21094.
Full textAbstract:
Abstract Low alloy steels (LAS), frequently used for pressure-containing equipment in subsea applications, are susceptible to hydrogen embrittlement when exposed to seawater environments under cathodic protection (CP), which can result in a reduction of toughness and ductility. Fracture toughness, which is an indication of a material’s resistance to crack propagation and unstable crack growth, is often determined from laboratory tests for design verification analysis or fitness-for-service applications. In hydrogen charging environments such as deaerated saltwater under CP, the fracture toughness is typically measured using either an unloading compliance (UC) or a rising displacement DCPD test method, both of which are described for air testing in the current ASTM E1820 standard. In this study, slow load rate fracture toughness tests on compact tension C(T) specimens using both test methods on the same heat of material are performed and compared. The tests are performed in a deaerated saltwater under CP environment using the same targeted K-rate of 0.005N/mm3/2/s. The UC test method is performed with a clip gauge for load-line displacement (LLD) and in-situ crack depth measurement, and the rising displacement DCPD test method infers LLD indirectly and uses DCPD for crack depth prediction. A comparison of the test results indicated a 35-65% increase in the calculated KJIC fracture toughness of the material when using the rising displacement DCPD test method.
4
Aliofkhazraei, Mahmood, Digby D. Macdonald, and Craig S. Gittleman. "Review of Benefits and Limitations of Ex-Situ Corrosion Tests for Bipolar Plates in Energy Conversion Devices." In CONFERENCE 2023. AMPP, 2023. https://doi.org/10.5006/c2023-19553.
Full textAbstract:
Abstract In this paper, at first different corrosion mechanisms of bipolar plates (BPPs) in fuel cells and water electrolyzers are briefly reviewed. These corrosion mechanisms include corrosion of cathode and anode plates under active area conditions, shunt-current assisted corrosion, and possibility of galvanic and localized corrosion of bipolar plates. Then application of ex-situ corrosion test methods to study the corrosion behavior of bipolar plates are reviewed and their abilities and limitations with respect to in-situ operational conditions will be discussed in detail. Finally, application of the “Point Defect Model” to calculate the iron release rate under simulated operational conditions of bipolar plates of passive metals and alloys based to compare with ex-situ corrosion test results will be reviewed. This model can be used for estimating the formation rate of soluble and insoluble corrosion products that can cause acceleration of membrane chemical degradation as well as increasing contact resistance between the BPPs and Gas Diffusion Media (GDM), respectively.
5
O’Dea, Vaughn, Cory Brown, and Anthony Dallen. "Pull-Off Adhesion Strength Testing of Lining Systems on Concrete: a Review of the Various Direct Tensile Test Methods Used for Severe Service Exposures." In SSPC 2016 Greencoat. SSPC, 2016. https://doi.org/10.5006/s2016-00051.
Full textAbstract:
Abstract Tensile pull-off adhesion testing is becoming a more frequent specification requirement for in situ quality assurance testing to confirm proper surface preparation and adhesion of high-performance protective linings applied to concrete. It is also becoming a widely used test for forensic analysis of protective linings in existing installations. There have been numerous investigations leading to the development of different devices and test pull-off adhesion methods used to assess bond strengths of mortars and overlay materials. There are fundamental differences between these methods that can dramatically impact tensile strength results. This paper presents the common pull-off adhesion test methods used in the United States as well as the results of experimental research investigating the results using two common tensile strength testers.
6
Haile, Tesfaalem, Lisa Sopkow, and Tamer Crosby. "Assessing the Corrosivity of Field Produced Water Obtained from In-situ Oil Sands Water Treatment Systems." In CORROSION 2017. NACE International, 2017. https://doi.org/10.5006/c2017-09389.
Full textAbstract:
Abstract In-situ oil sands water treatment systems (WTS) used to treat and recycle produced water to ultimately supply steam to the steam assisted gravity drainage (SAGD) and cyclic steam stimulation (CSS) processes have noted failures associated with corrosion including erosion-corrosion, under deposit corrosion (UDC), fouling/scaling, and localized corrosion among others. Oil sands operators employ corrosion monitoring tools, chemical treatment, and/or material selections to solve integrity related issues. However, the unpredictable occurrences of serious corrosion issues related to the complex and constantly changing water chemistries make it difficult to choose the appropriate preventative and mitigation strategies. This is further complicated by the effects of operating conditions; such as temperature, pressure, and flow geometry. This paper presents a study on the corrosivity of field produced water obtained from in-situ oil sands operators to UNS G10180 carbon steel. Rotating cylinder electrode (RCE) and rotating cage autoclave (RCA) systems were used as test methods. The susceptibility of the carbon steel to pitting was also evaluated using cyclic potentiodynamic polarization method. The findings indicated that corrosion rates were highly influenced by both water chemistries and operating conditions.
7
Kramer, Patrick, Fritz Friedersdorf, Christina Grumbach, et al. "Combined Mechanical Stress and Environmental Exposure Accelerated Coating Testing." In CORROSION 2017. NACE International, 2017. https://doi.org/10.5006/c2017-09116.
Full textAbstract:
Abstract Repair and replacement of exterior coating systems that no longer meet aesthetic or protective requirements generate a significant volume of environmentally hazardous waste, which includes the coating material combined with solvents and/or media used to remove the coatings, as well as the waste materials generated in surface preparation and reapplication of the coating system. There are strong economic and environmental drivers to extend the service life of aerospace coatings. However, development, selection, and use of the most durable coatings systems have often been limited by the ability to predict service performance in accelerated tests. Current accelerated test methods do not adequately employ the chemical, thermal, mechanical, or radiative stressors that produce relevant damage mechanisms in coated structures that can be used for accurate quantification of coating performance and service life. Test methodologies are being developed that employ combined environmental and mechanical loading modes to overcome this issue. The mechanisms and kinetics of damage progression are quantified continuously throughout a test using in situ measurements of coating system properties and substrate corrosion. Mechanical test fixtures and simulated structural components are being used to apply stresses to coating systems in accelerated atmospheric test chambers. The combined mechanical and environmental tests are expected to produce failure modes not achieved using traditional atmospheric test chambers. An overview is given of the test methods, in situ measurement systems, coating characterization, and combined effects atmospheric exposure testing.
8
Meck, Nacéra Sabrina, Brian Chambers, James Skogsberg, Russell Kane, and Tanmay Anand. "Sour Service Limits of Martensitic Stainless Steels: a Review of Current Knowledge, Test Methods and Development Work." In CORROSION 2013. NACE International, 2013. https://doi.org/10.5006/c2013-02639.
Full textAbstract:
Abstract Modern, high-strength martensitic stainless steel (MSS) oil country tubular goods (OCTG) including modified 13Cr (95, 110 and 115 grades) and UNS S42500 (125 ksi grade) are frequently considered as possible replacements to conventional 13Cr steel and duplex stainless steel tubulars for the completion of high-temperature, high-pressure (HTHP) wells. These alloys have demonstrated corrosion resistance in HTHP well conditions but are susceptible to environmentally assisted cracking (EAC) due to the interplay of depassivation by chlorides and hydrogen uptake enhanced by the presence of hydrogen sulfide. General caution and the need to perform extensive qualification tests on these alloys historically limited their service in sour oil and gas production. Despite significant test data and published papers on modified 13Cr grades of MSS OCTG, particularly on 13Cr-5Ni-2Mo materials, major questions remain and there is little agreement among users and producers of these materials, from testing methods to serviceability for sour service. Some of these issues include the use of acetate buffers, determination of in-situ pH and H2S charging, role of possible oxygen contaminants, and the nature of localized corrosion and EAC in sweet and sour conditions. To date, these issues and the lack of coherent data set for sour service limits have resulted in the absence of modified 13Cr MSS from NACE MR0175 / ISO 15156, the principal international sour service standard for selection of materials.3 This paper will review and summarize the literature highlighting discrepancies in test approaches and results and discuss a path forward for the inclusion of MSS as a group of materials into NACE MR0175/ISO 15156 and general acceptance of sour service limits.
9
Avance, Victoria, and Fritz Friedersdorf. "Real-time Measurement of Electrocoat, Powder Coat, and Organic Coatings for Atmospheric Galvanic Corrosion Protection." In CORROSION 2024. AMPP, 2024. https://doi.org/10.5006/c2024-20945.
Full textAbstract:
Abstract In this laboratory work, zero resistance ammeter measurements were used to collect galvanic corrosion measurements for scribed organic coating samples and e-coated samples in situ. For this work, a new sample design was derived from samples currently used in the automotive industry consisting of a base plate and a cover plate of another material to form a galvanic couple with a crevice between them. The samples were connected to a developmental test system that uses zero resistance ammeter (ZRA) measurements to collect galvanic corrosion rates for multiple samples in situ. E-coated samples were evaluated in accelerated corrosion tests for comparison with traditional organic coatings. A description of the samples, electrochemical measurement device, and methods for coating testing will be reported along with the analysis of the resulting data and its implications for evaluating various coating types.
10
Mackey, Nicole M. "Tank Linings Cure Response During Cold Winter Months; Ready for Immersion Service?" In CORROSION 2016. NACE International, 2016. https://doi.org/10.5006/c2016-07668.
Full textAbstract:
Abstract Standard practices for monitoring the cure of coatings for high performance applications have been well accepted by the industry. Employing a dry to handle or hardness based test creates a simple and effective means to qualitatively check the degree of cure before applying additional material or returning to service. These techniques allow for a fast characterization of relative hardness or resistance to deformation of the coating. However, during cold months this cannot be used as a qualitative estimate of the degree of through-cure, as the applied product has the tendency to freeze and may exhibit artificially high hardness values and/or a premature passing dry to handle result. Additional test methods are needed for in-situ evaluations of tank linings cured at cold temperatures to accurately assess the degree of cure and potential return to service. A side by side laboratory testing program was developed to investigate the degree of cure for 100% solids tank lining products using standard analytical techniques, laboratory immersion testing for a range of common commodities, and in-situ field evaluations. Correlation between laboratory testing and potential field evaluations was a key focus of this study.
Reports on the topic "In-Situ-Test methods"
1
Fahr, Sven, Daniel Tschopp, Jan Erik Nielsen, Korbinian Kramer, and Philip Ohnewein. Review of In Situ Test Methods for Solar Collectors and Solar Collector Arrays. IEA SHC Task 55, 2020. http://dx.doi.org/10.18777/ieashc-task55-2020-0014.
Full textAbstract:
This fact sheet presents three in situ test methods for solar collectors and solar collector arrays, namely In situ Collector Certification (ICC), Performance Check for Collector Arrays (PC) and Dynamic Collector Array Test (D-CAT). A comparison is made regarding their scopes and use cases, methodologies and outcomes, which could serve as a decision-making aid for stakeholders in selecting the procedure that best suits their needs. The analysis shows that the methods do not contradict, but rather complement each other.
2
Corscadden, Louise, and Anjali Singh. Grip Strength Test In Rodents. ConductScience, 2023. http://dx.doi.org/10.55157/cs2023109.
Full textAbstract:
The grip strength test is one of the most commonly applied tests in animal laboratories to measure neuromuscular functions or disorders. It was first developed in the 1970s. Today a wide range of techniques are available to study muscle strength in rodents. These methods are categorized into two categories:[2] Invasive method: In situ and in vitro measurements of muscle force are invasive methods. Non-invasive method: This method only includes in vivo measurement tests to analyze muscle force such as treadmill tests, wire hang tests, swimming endurance, vertical pole test, and grip strength tests. The most convenient technique of all tests is the grip strength test. It’s most convenient and causes less stress to animals. The grip test has been widely used in order to investigate the phenotypes of transgenic mice with neuromuscular disease and evaluate potential compounds involved in the motor functioning of organisms. The tests have been serving the purpose for 30 years either alone or in combination with other tests.
3
Krumme, M., D. Dwyer, S. Thiem, J. Tiedje, and R. Smith. Aquifer microcosms and in situ methods to test the fate and function of pollutant-degrading microorganisms. Office of Scientific and Technical Information (OSTI), 1990. http://dx.doi.org/10.2172/6906240.
Full text
4
Gummow and Segall. L51799 In-Situ Evaluation of Directional Drill-Bore Coating Quality. Pipeline Research Council International, Inc. (PRCI), 1998. http://dx.doi.org/10.55274/r0010665.
Full textAbstract:
The objectives of this project were to: (1) examine known techniques of evaluating coating quality on buried pipe; (2) select one or more of these methods for in-situ testing; (3) develop a field test procedure that a corrosion technician can follow using equipment typically at his or her disposal; and (4) evaluate the feasibility of using this procedure both before and after the bored pipe is tied in. Two methods - coating conductance and current requirements - were tested on epoxy-coated pipe samples which were back filled with soil having a different resistivities. Both test methods proved successful; therefore, a field test procedure was developed that incorporates both. However, this procedure cannot be used when the pipe is tied-in because of accuracy limitations of existing current measurement instruments (unless the pipe is tied-in using isolating fittings). Includes spreadsheets to aid the assessment calculations and associated examples.
5
Meißner, Frank, Heike Sonntag, and Anita Morandell-Meißner. Water uptake measurement for thermal renovations – comparison between non-destructive method, the Karsten tube, and automatic laboratory measurements. Department of the Built Environment, 2023. http://dx.doi.org/10.54337/aau541652209.
Full textAbstract:
The energy-efficient renovation of existing buildings requires precise knowledge of the wall structure. When using interior insulation systems, the driving rain resistance of the façade is also decisive for the function of the entire wall structure. When using interior insulation on exposed brick facades, the verification can often only be done with the help of a hygrothermal simulation. In practice, a non-destructive method, the Karsten tube or various modifications, is used to assess this essential characteristic value quickly. However, the measured values obtained from this method do not agree with the laboratory-measured values determined on a test specimen taken from the laboratory. This article presents measurements on bricks from several refurbishment projects to determine the cause. They were carried out both in the installed state with the in-situ method and subsequently after brick removal on the same materials under laboratory conditions to bring about comparability concerning the material. This article presents the automatic detection of water uptake of porous materials compared to the in-situ measurement with the Karsten tube. It evaluates the measurement results of both measurement methods.
6
Hair. L51836 Coating Requirements for Pipelines Installed by Horizontal Directional Drilling and Slip Boring. Pipeline Research Council International, Inc. (PRCI), 2000. http://dx.doi.org/10.55274/r0010144.
Full textAbstract:
Research began with a literature search to obtain relevant background material. Existing test methods were examined to determine their applicability to HDD and slip boring loads. Two generally applicable methods were identified, Technical Inspection Services (TISI) Gouge Test and the Taber Abraser Test (ASTM D 4060). To reinforce the results of the laboratory testing, a procedure was developed to verify the performance of the selected coating systems on actual HDD installations. Thios involved documentation of the general parameters of the installation, such as length, diameter, and surface conditions and then measuring the quality of the coating system after installation using the procedure developed under PRCI contract number PR-262-9738 titled "In-Situ Evaluation of Directional Drill/Bore Coating Quality, Evaluation of Test Methods". Ten (10) coating systems were selected for examination and an eleventh was added at a manufacturer's request and cost including; 3M 6352, Thanecoat TC-700, Powercrete, Lilly 2040, 3M 206N, SPC 2888, Powercrete J, Isotube, Zebron, NapRick, CeramGard ML.
7
Robinett, Fred. PR-471-14207-Z03 Evaluation of Field Pump Performance Testing Procedure. Pipeline Research Council International, Inc. (PRCI), 2019. http://dx.doi.org/10.55274/r0011616.
Full textAbstract:
In situ pump performance testing was performed at the TransCanada pipeline Monitor station in Alberta Canada and Liebenthal station in Saskatchewan Canada in accordance with the Field Pump Performance Testing Procedure (PRCI report PR-471-14207-R01). Testing at the Monitor station was performed by Sulzer with two different batches of crude oil with slightly different viscosities and densities. Because of the pipeline operation limitations the flow could not be varied appreciably, however the flow points were near the pumps bep flow and therefore believed to be beneficial. To help validate field pump performance testing techniques measurements were taken using two methods to measure flow and two to measure pump power-in. Testing at the Liebenthal station was performed by TransCanada personnel on one fixed speed and one variable speed unit. All testing was performed with one batch of crude oil. The fixed speed unit power was measured with electrical power to the motor and the variable speed unit power was measured with a torque meter and electrical power. A full description of the Excel sheets used to calculate the field pump performance and the factory test data corrected to field conditions is made. The spreadsheet is included with this report. This work will benefit the liquids pipeline operators by validating the field test procedure, thereby providing assurance and acceptance of the methods. Using these field pump performance testing methods on additional pumps will help populate the database of measured viscous pump performances. This data can then be used to further improve the Hydraulic Institutes viscous correction calculations. Additionally, improved field pump performance measurements will allow the pipeline users to optimize their pipeline operation.
8
Arnett, Clint, and Rebekah Wilson. Evaluation of a visible light responsive photocatalytic coating to resist microbial contamination and increase indoor air quality. Engineer Research and Development Center (U.S.), 2023. http://dx.doi.org/10.21079/11681/47644.
Full textAbstract:
To meet new Department of Defense (DoD) energy standards, buildings are being constructed, and existing buildings are being retrofitted with tighter envelops. These new standards can reduce operational costs significantly but also limit fresh outdoor air coming into the built environments. This can result in the accumulation of harmful substances within buildings, which can have adverse effects on its occupants. New photocatalytic coatings may be a solution to this ever-increasing problem as they have the ability to destroy both chemical and biological toxins when activated with light. This work evaluated a novel indoor-light-reactive photocatalytic coating for its ability to eliminate or reduce microbial contamination un-der in situ test conditions. However, air and surface sampling revealed no reduction in either viable fungi and bacteria or total airborne mold spores. Additionally, no significant differentiation could be made in the composition of volatile organics between the treated and untreated areas. How-ever, testing the photocatalytic activity of the coating with standardized test methods and increased illumination, revealed the coating did exhibit antimicrobial activity against mold, bacteria, and viruses. This suggested that there may be limited benefit to using the indoor-light-reactive photocatalytic coating to inhibit microbial contamination unless specific lighting conditions can be met.
9
Steudlein, Armin, Besrat Alemu, T. Matthew Evans, et al. PEER Workshop on Liquefaction Susceptibility. Pacific Earthquake Engineering Research Center, University of California, Berkeley, CA, 2023. http://dx.doi.org/10.55461/bpsk6314.
Full textAbstract:
Seismic ground failure potential from liquefaction is generally undertaken in three steps. First, a susceptibility evaluation determines if the soil in a particular layer is in a condition where liquefaction triggering could potentially occur. This is followed by a triggering evaluation to estimate the likelihood of triggering given anticipated seismic demands, environmental conditions pertaining to the soil layer (e.g., its depth relative to the ground water table), and the soil state. For soils where triggering can be anticipated, the final step involves assessments of the potential for ground failure and its impact on infrastructure systems. This workshop was dedicated to the first of these steps, which often plays a critical role in delineating risk for soil deposits with high fines contents and clay-silt-sand mixtures of negligible to moderate plasticity. The workshop was hosted at Oregon State University on September 8-9, 2022 and was attended by 49 participants from the research, practice, and regulatory communities. Through pre-workshop polls, extended abstracts, workshop presentations, and workshop breakout discussions, it was demonstrated that leaders in the liquefaction community do not share a common understanding of the term “susceptibility” as applied to liquefaction problems. The primary distinction between alternate views concerns whether environmental conditions and soil state provide relevant information for a susceptibility evaluation, or if susceptibility is a material characteristic. For example, a clean, dry, dense sand in a region of low seismicity is very unlikely to experience triggering of liquefaction and would be considered not susceptible by adherents of a definition that considers environmental conditions and state. The alternative, and recommended, definition focusing on material susceptibility would consider the material as susceptible and would defer consideration of saturation, state, and loading effects to a separate triggering analysis. This material susceptibility definition has the advantage of maintaining a high degree of independence between the parameters considered in the susceptibility and triggering phases of the ground failure analysis. There exist differences between current methods for assessing material susceptibility – the databases include varying amount of test data, the materials considered are distinct (from different regions) and have been tested using different procedures, and the models can be interpreted as providingdifferent outcomes in some cases. The workshop reached a clear consensus that new procedures are needed that are developed using a new research approach. The recommended approach involves assembling a database of information from sites for which in situ test data are available (borings with samples, CPTs), cyclic test data are available from high-quality specimens, and a range of index tests are available for important layers. It is not necessary that the sites have experienced earthquake shaking for which field performance is known, although such information is of interest where available. A considerable amount of data of this type are available from prior research studies and detailed geotechnical investigations for project sites by leading geotechnical consultants. Once assembled and made available, this data would allow for the development of models to predict the probability of material susceptibility given various independent variables (e.g., in-situ tests indices, laboratory index parameters) and the epistemic uncertainty of the predictions. Such studies should be conducted in an open, transparent manner utilizing a shared database, which is a hallmark of the Next Generation Liquefaction (NGL) project.
10
Riccardella, Scott, Jason Van Velsor, Aaron Dinovitzer, and Bill Amend. PR-335-173816-R01 Validation of In-Situ Methods for Material Property Determination. Pipeline Research Council International, Inc. (PRCI), 2018. https://doi.org/10.55274/r0011521.
Full textAbstract:
For various reasons, many pipeline operators have missing or incomplete records for portions of their transmission pipeline assets. Information that is vital to the safe operation of a pipeline, such as material grade, may be unknown and recently proposed regulation is driving the need to either verify the material properties of these undocumented sections of piping or to replace them entirely with known materials. New technologies have shown promise and promoted the ability to predict strength and toughness values of typical pipeline steels. Commonly employed and non-proprietary tools and methods for data collection were referenced in PRCI project NDE-4C (report PR-214-123743-R01); however, no detailed protocol was identified for employing these tools and the variability between lab and field measured values were not defined. This project developed a field protocol for collecting the data necessary to apply the NDE-4C algorithms and then evaluated this methodology, along with other proprietary "in-the-ditch" NDE methods. This report summarizes the test protocol applied and performance results from the different techniques applied.