Готові списки джерел за темами / Concrete Permeability Measurement

Добірка наукової літератури з теми "Concrete Permeability Measurement"

Автор: Grafiati
Опубліковано: 10 грудня 2022
Оновлено: 28 січня 2023

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Статті в журналах з теми "Concrete Permeability Measurement"

1

Perraton, Daniel, Alan Carter, Michel Vaillancourt, and Bruno Lavoie. "Perméabilité in situ du béton de peau, établie à partir de la percolation d'un gaz en régime d'écoulement permanent." Canadian Journal of Civil Engineering 29, no. 3 (June 1, 2002): 360–68. http://dx.doi.org/10.1139/l02-009.

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In an attempt to apply the concepts developed by Carman and Klinkenberg for the measurement of permeability of a porous media using a gas, a permeameter for the in-situ measurement of intrinsic permeability of skin concrete has been developed. The established technique allows concentration of gas percolation through a well-defined zone in the superficial layer of concrete. The instrument, the measurement method, and the calculation procedure are described in details in this paper. Several series of tests have been performed in laboratory on concrete blocks (300 × 300 × 400 mm) to simulate measurements on the construction site. Three types of concrete, with different porosity, have been tested. The measurement of permeability performed on the concrete blocks have been accomplished both on shaped surfaces, which are representative of skin concrete, and on sawed surfaces, which are representative of mass concrete. Results show that the relationship between the water/cement ratio and the permeability of skin concrete varies distinctively compared with that of mass concrete. The permeameter allows quantification of what has been for a long time qualified as a determining element in terms of the durability of concrete against the corrosion of reinforcement, that is, the distinct permeability of skin concrete from that of mass concrete.Key words: skin concrete, in-situ permeability, intrinsic permeability, apparent permeability, permeameter, Klinkenberg.[Journal translation]
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2

Bhargava, A., and N. Banthia. "MEASUREMENT OF CONCRETE PERMEABILITY UNDER STRESS." Experimental Techniques 30, no. 5 (September 2006): 28–31. http://dx.doi.org/10.1111/j.1747-1567.2006.00082.x.

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3

Dobias, Daniel, Milan Kouril, Radka Novakova, Petr Pokorný, and Radka Pernicova. "Measurement of Chloride Permeability in UHPC by Accelerated Method." Solid State Phenomena 259 (May 2017): 80–84. http://dx.doi.org/10.4028/www.scientific.net/ssp.259.80.

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The chloride permeability of concrete (UHPC) was evaluated by means of the Rapid chloride permeation test and and standard difusion test. The tests are different in the voltage applied for accelerating the transport through the concrete specimen. The permeability strongly depends on quality and curing time of the concrete.
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4

Ribeiro, A., V. dos Santos, D. T. Pagnussat, and R. N. Brandalise. "Assessment of a system for the prediction of water permeability coefficient in pervious concretes." Cerâmica 64, no. 372 (December 2018): 519–25. http://dx.doi.org/10.1590/0366-69132018643722445.

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Abstract Proposing a system which makes it possible to determine the water permeability coefficient in pervious concretes in a practical way, without the need of devices which require complex instrumentation, is one of the aims of this work. An experimental matrix was proposed for the evaluation of the measurement system of the coefficient of permeability into pervious concrete considering three different pervious concretes obtained from different aggregate granulometric sizes, under the condition of dry sample or water saturated. The pervious concretes were characterized by their void contents, mechanical properties and later compared with the properties of a reference, control concrete made up of coarse and fine aggregates. The different properties exhibited in this study were assessed aiming at validating the experimental matrix developed for pervious concretes to provide a basis for comparison with information available in the literature. As a noticeable result, it was evidenced that the permeability coefficient of 0.21 cm.s-1 obtained for concrete with aggregate dimensions of 2.4 to 9.5 mm. It is possible to measure the coefficient of permeability of pervious concrete with the system developed in this study; the obtained results agree with the description of ACI522-06 for pervious concretes.
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5

Stavař, Tomáš, and Michal Stehlík. "The Assessment of Durability of Fibre Concretes with Dense Aggregate and Concrete Recyclate from the Results of Permeability and Diffusion Tests." Advanced Materials Research 1100 (April 2015): 106–11. http://dx.doi.org/10.4028/www.scientific.net/amr.1100.106.

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The mechanical and deformation characteristics of mass concrete are considerably improved by adding long structural fibres. This addition, however, does not always extend the durability of concrete. One of the key factors in the evaluation of durability of fibre concretes is the assessment of permeability of their surface layer using one of the non-destructive methods. In this research, three of these methods were used: two permeation methods with a gaseous medium, TORRENT and CO2 permeability method, and the British ISAT with a liquid medium, on the grounds of their simplicity of application and their possible combinability. The test results show that both TORRENT and ISAT methods can be used to assess the durability of both concrete and fibre concrete with dense aggregate. In the case of concrete containing concrete recyclate, however, the TORRENT method was not effective. Also the method of determining the permeability for CO2 was not suitable for the concrete with concrete recyclate. Even for other concretes this method was too complicated and too dependent on the marginal conditions of the measurement.
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6

Stehlík, Michal, Věra Heřmánková Věra Heřmánková, and Lubomír Vítek. "OPENING OF MICROCRACKS AND AIR PERMEABILITY IN CONCRETE." Journal of Civil Engineering and Management 21, no. 2 (January 30, 2015): 177–84. http://dx.doi.org/10.3846/13923730.2013.802721.

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The aim of this paper is to evaluate the suitability of the Torrent method of determining air permeability of concrete for an approximate assessment of damage to the surface layer of concrete caused by microcracks. The combined measurement of deformation and air permeability by means of Torrent method and of the width of microcracks on the tested concrete cubes during loading in the splitting tensile test contributed to the clarification of certain facts. The use of Torrent method seems to be more suitable in reinforced concretes where it is possible to anticipate a slower opening of cracks during the increase of load. In spite of that, the testing of these concretes is limited by the maximum dimensions of cracks, i.e. 0.075–0.1 mm in the width and 60 mm in the length. Exceeding these limit dimensions causes a massive decrease in vacuum and subsequent separation of the adhering bell of the Torrent tester.
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7

Chen, Lu-Ming, Jui-Wen Chen, Ting-Hao Chen, Timothy Lecher, and Paul Davidson. "Measurement of Permeability and Comparison of Pavements." Water 11, no. 3 (March 2, 2019): 444. http://dx.doi.org/10.3390/w11030444.

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Permeable pavements have the ability to reduce surface runoff by allowing water to infiltrate into the underlying soil. The potential of permeable pavements to assist in managing stormwater and improve water quality has gained attention as an option, other than conventional impermeable concrete for paving purposes. This study examined the permeability of three different pavement systems, including the JW Eco-technology pavement (JW), which has not previously been installed or studied in the U.S., standard impermeable concrete (IC), and pervious concrete (PC). Each pavement type was installed in triplicate. Devices based on the ASTM C1701/C1701M and ASTM C1781/C1781M constant-head methods, the National Center for Asphalt Technology (NCAT) falling-head permeameter, and two new square frames, SF-4 and SF-9, modified to fit the JW pavement, were utilized for permeability measurement on several locations of each pavement system. The results showed that the JW Eco-technology pavement had comparable permeability to the commonly used PC pavement in each method used. In addition, there was a strong correlation between the permeability measurements of NCAT method and SF-4, and between the ASTM standard and SF-9. The square frames used in this study showed their effectiveness and efficiency in performing permeability measurements. It was also found that the permeability obtained had a pronounced difference in values between the falling head and the constant head methods, with an average ratio ranging from 4.08–6.36.
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Cui, Xinzhuang, Jiong Zhang, Na Zhang, Zhijun Gao, Wei Sui, and Cong Wong. "Improvement of Permeability Measurement Precision of Pervious Concrete." Journal of Testing and Evaluation 43, no. 4 (October 10, 2014): 20130176. http://dx.doi.org/10.1520/jte20130176.

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Claisse, P. A., E. Ganjian, and T. A. Adham. "In situ measurement of the intrinsic permeability of concrete." Magazine of Concrete Research 55, no. 2 (April 2003): 125–32. http://dx.doi.org/10.1680/macr.2003.55.2.125.

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Claisse, P. A., E. Ganjian, and T. A. Adham. "In situ measurement of the intrinsic permeability of concrete." Magazine of Concrete Research 55, no. 2 (April 2003): 125–32. http://dx.doi.org/10.1680/macr.55.2.125.37567.

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Дисертації з теми "Concrete Permeability Measurement"

1

Hudd, Raymond W. "Measurement of concrete permeability." Thesis, Loughborough University, 1989. https://dspace.lboro.ac.uk/2134/6722.

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Анотація:
A comparison was made between a number of laboratory and in-situ concrete permeability test methods. The laboratory tests used measured air, water, and water vapour permeability, whilst the in-situ tests used were the Initial surface absorption test, the Figg air and water tests, and a new in-situ method called the Egg test; a non-destructive surface test which measures air permeability properties. An initial set of tests were carried out on six concrete mixes with water: cement(w/c) ratios between 0.3 and 0.8. These tests showed that problems existed with both the laboratory and in-situ test methods. Some of these problems arose from the preparation of specimens or test procedures and these were overcome with practice or by modifying the test methods. However, it was found that a major problem is moisture in the concrete which decreases it's measured permeability. Further tests were carried out on a second set of concrete specimens with the same mix proportions as the first and a set of mortar specimens with w/c ratios ranging from 0.3 to 1.1 and cement: sand (c: s) ratios from 1: 1 to 1: 5. Results from tests on oven dry specimens were used to compare the different methods and showed that few simple relationships existed between the different methods. Comparing the test results with the mix proportions showed that in the majority of cases, the measured permeability values increased as the w/c ratio increased, but the relationships between the tests results and c: s ratio were more complicated. After these tests had been completed, specimens from twenty six of the mixes were retested after being conditioned to various different moisture contents. The results of these tests showed that in most cases there was a rapid increase in measured permeability as the specimens dried, followed by a slower increase (in some cases a decrease) as the specimens approached an oven dry condition. To complement this study a number of methods were examined for measuring in-situ moisture content. The most promising of these was a non-destructive method which operated by measuring the electrical permittivity of the material it was placed against. Because the electrical permittivity varies with the amount of water in the concrete, it is largely independent of the type material being tested. Results from this test showed a shallow linear drop from saturated to approximately half of the saturated moisture content, followed by a steep drop towards the oven dry condition.
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Книги з теми "Concrete Permeability Measurement"

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Hudd, Raymond Walker. Measurement of concrete permeability. 1989.

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Частини книг з теми "Concrete Permeability Measurement"

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Dawei, Mo, Zhang Chaozong, Guo Zhiping, Liu Yisi, An Fulin, Mio Qitian, Wang Zhimin, and Lian Huizhan. "The Application of Neutron Radiography to the Measurement of the Water-Permeability of Concret." In Neutron Radiography, 255–62. Dordrecht: Springer Netherlands, 1987. http://dx.doi.org/10.1007/978-94-009-3871-7_35.

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2

"Factors affecting the measurement of the permeability of concrete." In Transport Properties of Concrete, 149–56. Elsevier, 2021. http://dx.doi.org/10.1016/b978-0-12-820249-4.00009-2.

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Claisse, Peter A. "Factors affecting the measurement of the permeability of concrete." In Transport Properties of Concrete, 153–60. Elsevier, 2014. http://dx.doi.org/10.1533/9781782423195.153.

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4

"Measurement of the air permeability of concrete “in situ”: Status quo." In Concrete Repair, Rehabilitation and Retrofitting III, 132–34. CRC Press, 2012. http://dx.doi.org/10.1201/b12750-49.

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Reinhardt, H. W., and J. P. G. Mijnsbergen. "In-situ measurement of permeability of concrete cover by overpressure." In The Life of Structures, 243–54. Elsevier, 1989. http://dx.doi.org/10.1016/b978-0-408-04245-1.50032-7.

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"Water vapour and liquid permeability measurements in concrete." In Transport Properties of Concrete, 103–14. Elsevier, 2021. http://dx.doi.org/10.1016/b978-0-12-820249-4.00007-9.

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Claisse, Peter A. "Water vapour and liquid permeability measurements in concrete." In Transport Properties of Concrete, 107–18. Elsevier, 2014. http://dx.doi.org/10.1533/9781782423195.107.

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Тези доповідей конференцій з теми "Concrete Permeability Measurement"

1

"Laboratory Permeability Measurement." In SP-108: Permeability of Concrete. American Concrete Institute, 1988. http://dx.doi.org/10.14359/3633.

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2

"Suitability of the Measurement Techniques of Oxygen Permeability in Order to Predict Corrosion Rates of Concrete Rebars." In SP-122: Paul Klieger Symposium on Performance of Concrete. American Concrete Institute, 1990. http://dx.doi.org/10.14359/2453.

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3

Soleimani, Manuchehr, and William R. B. Lionheart. "Magnetostatic Permeability Tomography in Material Inspection." In ASME 7th Biennial Conference on Engineering Systems Design and Analysis. ASMEDC, 2004. http://dx.doi.org/10.1115/esda2004-58282.

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Structural materials in reinforced concrete, often made of iron, are sometimes damaged due to acid, rain or salty wind. The magnetic permeability of the damaged materials change due to this damage. In this paper we study an advance monitoring system based on a magnetostatic permeability tomography (MPT) technique. The magnetostatic field is applied to the material from the external surfaces and the measurement data for inspection are the normal components of the resulting magnetostatic fields in the surface. Knowing the tangential component of the applied field and normal component of the measured field uniquely defines the permeability distributions. In practise, excitation and sensing coils can be used for the measurement configuration, in order to gather the data from the surface. The problem of the permeability reconstruction is then a nonlinear and ill-posed inverse problem. We employed a regularised Gauss-Newton method to recover the permeability distribution. The forward problem is to simulate the measurement process. We have implemented a 3D edge-based finite element package to solve the magnetostatic problem via a formulation based on magnetic vector potentials. For the Jacobian matrix and the sensitivity analysis we derived an efficient formulation based on the reciprocity theorem. The results of the forward problem and the sensitivity map will be presented in this paper. We also show the results of 3D permeability reconstruction for a numerically simulated MPT system. The system consists of 8 coils which are used to apply the primary field and measuring the resulting field. The images are reconstructed using synthetically generated data with 28 independent scanning measurements with added noise. The high contrast and low contrast permeability reconstruction will be discussed.
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4

"Early Age Permeability Measurements for Prediction of Concrete Durability." In SP-131: Durability of Concrete--G.M. Idorn International Symposium. American Concrete Institute, 1992. http://dx.doi.org/10.14359/1214.

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Hattori, Takatoshi, and Michiya Sasaki. "Development of Waste Monitor of Clearance Level to Ensure Social Reliance on Recycled Metal From Nuclear Facilities." In ASME 2003 9th International Conference on Radioactive Waste Management and Environmental Remediation. ASMEDC, 2003. http://dx.doi.org/10.1115/icem2003-4534.

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Metal and concrete wastes in the decommissioning of nuclear facilities are classified according to their radioactivity level after decontamination. Radioactive waste below the clearance level (e.g., 0.4Bq.g−1 for Co-60 in Japan) can be disposed of as general industrial waste or recycled. Metal wastes mainly originate from equipment in buildings, except for the metal bars in reinforced concrete. Since contaminated equipment must be decontaminated after dismantling, the main target of measurement would be fragments of equipment, of various shapes, numbers and sizes. In order to transport such metallic fragments out of controlled areas, a surface contamination survey must be performed to confirm that the contamination level is below the legal standard level (e.g., 4Bq.cm−2 for beta or gamma emitters in Japan) in addition to satisfying the clearance level. Taking account of social reliance on recycled metal after inspection of the clearance level and the surface contamination level, it is important to remove the possibility of overlooking contamination above these levels in the recycled metal. The measurement of beta rays is suitable for determining surface contamination on metal because almost none of the beta particles from inside the metal can be detected and the detected radiation can be mostly limited to that from the surface. This is the reason why a survey meter for measuring surface contamination has a detector with a higher sensitivity for beta particles than for gamma rays. Considering the characteristics of the survey meter, it may be difficult to measure the contamination level of the surface of a metal fragment, particularly when the surface is not flat. Moreover, in the case of internal contamination of a small metal pipe, measurement is impossible. The permeability of gamma rays is much greater than that of beta particles. Therefore, gamma rays can be detected even from internal contamination in metal. For gamma ray measurement, accurate and easy calibration of the actual radioactivity level and count rate obtained using a measurement instrument is important. If gamma ray measurement can confirm that the radioactivity level is less than about 400Bq, both the clearance level and the surface contamination level could be inspected simultaneously. In addition, the great amount of labor needed for manual inspection using a survey meter could be saved, and there will be no possibility of missing hot spots of radioactivity due to human error. In this study, a new technique for precise and automatic measurement of gamma emitters in metal waste has been developed using 3D noncontact shape measurement and Monte-Carlo calculation techniques to objectively confirm that the specific radioactivity level of metal waste satisfies the clearance level and furthermore, that the surface contamination level of the metal waste is below the legal standard level. The technique can yield a calibration factor for every measurement target automatically and realizes automatic correction for the reduction of the background count rate in gamma measurements due to the self-shielding effect of the measurement target. A practical monitor (Clearance Automatic Laser Inspection System, CLALIS) has been developed. The accuracy of the automatic calibration and correction of background reduction of the practical monitor has been clarified using mock metal wastes of various shapes, numbers and sizes. It was found that the values measured using the present monitor and the actual radioactivity level agreed within +/−20%, and the corrected and actual background reductions agreed within +/−2%. The detection limit of the present monitor was estimated as being 100Bq for Co-60, taking into consideration the calibration error and correction error of the reduction of the background count rate. The monitor accomplished precise measurements with a 100sec (30sec for gamma ray measurement, 30sec for background measurement) process time per inspection. This indicates that approximately 5 tons of metal waste can be measured per day (1,000 tons per year) in 20kg batches at that process speed.
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"Assessment of Microstructural Changes During Rapid Chloride Permeability Test Using Impedance Spectroscopy Measurements." In SP-189: High-Performance Concrete Research to Practice. American Concrete Institute, 2000. http://dx.doi.org/10.14359/5860.

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Zambrano, Rafael, Yevhen Makar, Michael Sadivnyk, Andriy Butenko, Oleksandr Doroshenko, Volodymyr Novikov, Miljenko Cimic, Chiara Cavalleri, Samira Ahmad, and Yernur Akashev. "Advances in Cased-Hole Formation Evaluation—The Access to Untapped Tight-Gas Resources in Mature Fields: A Case Study from the Dnieper-Donets Basin, Ukraine." In SPE Europec featured at 82nd EAGE Conference and Exhibition. SPE, 2021. http://dx.doi.org/10.2118/205214-ms.

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Abstract The Sakhalin Field is located in the Dnieper-Donets Basin, east of Ukraine, and has been producing 7.7 billion cubic meters of natural gas in place from carboniferous rocks since the 1980s. Notwithstanding, it is strongly believed that significant untapped resources remain in the field, specifically those classified as tight intervals. Advances in wireline logging technology have brought, besides better accuracy on measurements behind the casing, a new measurement called fast neutron cross-section (FNXS), which has proved to be sensitive enough to the volume of gas in low-porosity formations. This enabled a quantitative interpretation for a better understanding of where these additional resources may lie in the Sakhalin Field. The methodology is based on advanced pulsed neutron spectroscopy logs to assess the essential formation properties such as lithology, porosity, and gas saturation and reduce the evaluation uncertainty in potential tight gas intervals. The advanced technology combines measurements from multiple detectors that represent independent formation properties such as formation sigma, thermal neutron porosity, FNXS, and elemental fractions. To address the lithology, the tool measures directly the rock elements required to determine representative mineralogy and matrix properties, which in turn are used to compensate for the matrix effects and obtain a reliable porosity and gas volume estimation. The methodology was tested on the upper Visean productive zones (Mississippian epoch) characterized by its low porosity (<10 pu) and permeability (<10 mD). In the past, those intervals have been overlooked because of inconclusive petrophysical interpretation based on basic openhole logs and their low production in some areas of the field. The necessity to finding new reserves has motivated the re-evaluation of possible bypassed tight-gas intervals by logging of mature wells behind casing in different sectors of the field. Advanced pulsed neutron spectroscopy logging behind casing uniquely identifies reserves in tight-gas intervals where basic open-hole interpretations were ambiguous. The gas production obtained from the perforated intervals supports the formation evaluation parameters estimated from the standalone interpretation of the pulsed neutron data. This work describes in detail the application of the alternative methodology and interpretation workflow to evaluate the formation through the casing. A concrete example is presented to illustrate the effectiveness of this approach in the revealing and development of tight gas reservoirs in mature fields in the Dnieper-Donets Basin.
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Giao, Pham Huy, Lahiru Nagasingha, and Pramuditha Theekshana. "A new method to monitor and determine permeability of concrete based on resitivity and time-domain chargeability measurements." In The 13th SEGJ International Symposium, Tokyo, Japan, 12-14 November 2018. Society of Exploration Geophysicists and Society of Exploration Geophysicists of Japan, 2019. http://dx.doi.org/10.1190/segj2018-074.1.

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Ouldboukhitine, Salah, Sofiane Amziane, and Maroua Benkhaled. "A Model for Assessment of Heat and Moisture Transfer Hollow a Hemp Concerte Wall Using Finite Element Method." In 4th International Conference on Bio-Based Building Materials. Switzerland: Trans Tech Publications Ltd, 2022. http://dx.doi.org/10.4028/www.scientific.net/cta.1.855.

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The energy performance of buildings represents a major challenge in terms of sustainable development. The buildings and buildings construction sectors combined are responsible for over one-third of global final energy consumption and nearly 40% of total direct and indirect CO2 emissions. In order to reduce the energy consumption of buildings and their harmful impact on the environment, special attention has been paid in recent years to the use of bio-based materials. In the present paper, a model of heat and moisture transfer hollow hemp concrete wall is proposed using finite element method. The energy and mass balances are expressed using measurable transfer drivers as temperature water content and vapor pressure and coefficients related explicitly to the macroscopic properties of material as thermal conductivity, specific heat, and water vapor permeability. The proposed model is implemented in MATLAB code and validated through experimental measurements.
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Jaboob, Musallam, Ahmed Al Shueili, Hussien Al Salmi, Salim Al Hajri, German Merletti, Rifat Kayumov, Stevanus dwi Kurniadi, and Ricardo Sebastian Trejo. "Fracture Geometry Calibration Using Multiple Surveillance Techniques." In SPE International Hydraulic Fracturing Technology Conference & Exhibition. SPE, 2022. http://dx.doi.org/10.2118/205280-ms.

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Abstract An accurate Mechanical Earth Model (MEM) is of vital importance in tight gas reservoirs where hydraulic fracturing is the only way to produce hydrocarbons economically. The Barik tight gas reservoir is the main target in Khazzan and Ghazeer Fields at the Sultanate of Oman (Rylance et al., 2011). This reservoir consists of multiple low-permeability sandstone layers interbedded with marine shales. A good understanding of the fracture propagation in such a reservoir has a major effect on completion and fracturing design. The MEM derived from sonic logs and calibrated with core data needs to be further validated by independent measurements of the fracturing geometry. Multiple surveillance techniques have been implemented in the Barik reservoir to validate the MEM and to match observations from hydraulic fracturing operations. These techniques include closure interpretation using a wireline deployed formation testing assembly, the use of mini-frac injection tests with deployed bottomhole pressure gauges, execution of post injection time-lapse temperature logging, the injection of radioactive tracers, associated production logging, subsequent pressure transient analysis and other techniques. A cross-disciplinary team worked with multiple sources of data to calibrate the MEM with the purpose of delivering a high-confidence prediction of the created fracture geometry, which honors all available surveillance data. In turn, this validation approach provided a solid basis for optimization of the completion and fracturing design, in order to optimally exploit this challenging reservoir and maximize the economic returns being delivered. For example, combination of stress testing with radioactive tracers provided confidence in stress barriers in this multilayered reservoir. Pressure transient analysis allowed to calibrate mechanical model to match fracturing half-length that is contributing to production. This paper provides extensive surveillance examples and workflows for data analysis. Surveillance of this degree in the same well is uncommon because of the associated time and cost. However, it provides unique value for understanding the target reservoir. This paper demonstrates the Value Of Information (VOI) that can be associated with such surveillance and provides a concrete and practical example that can be used for the justification of future surveillance programs associated with the hydraulic fracturing operations.
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