Дисертації з теми "Effect of Cemented Fill"
Оформте джерело за APA, MLA, Chicago, Harvard та іншими стилями
Ознайомтеся з топ-39 дисертацій для дослідження на тему "Effect of Cemented Fill".
Біля кожної праці в переліку літератури доступна кнопка «Додати до бібліографії». Скористайтеся нею – і ми автоматично оформимо бібліографічне посилання на обрану працю в потрібному вам стилі цитування: APA, MLA, «Гарвард», «Чикаго», «Ванкувер» тощо.
Також ви можете завантажити повний текст наукової публікації у форматі «.pdf» та прочитати онлайн анотацію до роботи, якщо відповідні параметри наявні в метаданих.
Переглядайте дисертації для різних дисциплін та оформлюйте правильно вашу бібліографію.
Jayasinghe, Mudiyanselage Harshani Dilanka Jayasinghe. "Scaled - Down Open Stoping Under Cemented Paste Fill." Thesis, Curtin University, 2020. http://hdl.handle.net/20.500.11937/79930.
Повний текст джерелаHughes, Paul B. "Design guidelines : underhand cut and fill cemented paste backfill sill beams." Thesis, University of British Columbia, 2014. http://hdl.handle.net/2429/47089.
Повний текст джерелаRask, Amanda. "Indirect methods as quality control of cemented hydraulic fill : Renström mine, Boliden mineral AB." Thesis, Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-72962.
Повний текст джерелаBerglund, Lina. "The Effect of Cooling Rate on Sintered Cemented Carbides." Thesis, KTH, Materialvetenskap, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-288541.
Повний текст джерелаMagnetiska egenskaper är en viktig del av kvalitetskontrollen av hårdmetaller. Tidigare forskning hos Sandvik Mining and Rock Technology har visat att koerciviteten hos en hårdmetallsort ökar med ökad kylhastighet vid sintring. Målet med den här studien är att undersöka varför koerciviteten ökar med kylhastigheten och om detta även gäller andra hårdmetallsorter. Tre olika hårdmetallsorter sintrades med olika kylhastigheter undersöktes med mätningar av koercivitet, magnetisk mättnat i koboltfasen och hårdhet, samt med mikroskopi och Electron Backscatter Diffraction analys. Det visade sig att koerciviteten ökade med ökad kylhastighet för hårdmetallsorten som studerats tidigare, men inte för de andra två sorterna. En ökad koercivitet förväntas visa på en minskad WC-kornstorlek, men resultaten visar att det långsamt kylda och snabbkylda provet hade samma WC-kornstorlek. Däremot upptäcktes en ändring av storleken på Co-områdena mellan WC-kornen. Det snabbkylda provet visade en mindre storlek av Co-områdena jämfört med det långsamt kylda provet. Fler Co/WC-korngränser i det snabbkylda provet leder till en ökad koercivitet. Fraktionen av hcp-Co/fcc-Co-korngränser ökade också för det snabbkylda provet vilket också ökar koerciviteten. Inget samband mellan hårdheten och koerciviteten eller kylhastigheten upptäcktes. Beräkning av kontiguiteten för de olika sorterna genomfördes också. Ingen signifikant skillnad i koercivitet mellan de olika kylhastigheterna för the olika sorterna hittades, men kontiguiteten mellan de olika sorterna varierade. Det beror mest troligt på att dom olika sorterna har olika mängd matrismaterial.
Bertrand, Timothy Paul. "Effect of water maldistribution on cooling tower fill performance evaluation." Thesis, Stellenbosch : University of Stellenbosch, 2011. http://hdl.handle.net/10019.1/6841.
Повний текст джерелаENGLISH ABSTRACT: A 1.5 x 1.5 m2 counter-flow fill performance test facility is described in detail. Instrumentation was selected and installed in the cooling tower fill test facility and calibrated to ensure measurement accuracy. A facility control program was written to simplify the operation of the test facility via a user interface. The program calculates automatically the Merkel number and loss coefficients as measures of fill thermal and flow performance respectively. A spray frame was designed and manufactured to ensure uniform water distribution to the fill. The water distribution through different fills with varying fill heights and different water flow rates was measured. The water attached to the walls of the test facility was examined. Film, trickle and splash fills are tested in the upgraded test facility. The film and trickle fill performance determined during testing is deemed acceptable as these fills have minimal migration effects. Fills with poor distribution effects and large migration of water towards the walls of the test facility, like the splash fill tested, cannot to be tested accurately in a 1.5 x 1.5 m2 test section as the results do not represent the performance of the fill in a relatively large cooling tower. Other aspects examined were: • air flow uniformity • air fill bypass effects • location of water inlet and outlet temperature measurement points • location of pressure measurement probes. It was determined that, in the current test facility: • air uniformity is suitable for performance testing • air bypass effects can be ignored for open fills and can be minimised for dense fills by packing sponge between the fill and walls • water inlet and outlet temperatures should be measured in the pipe-work, resulting in a measurement method that is not influenced by the relative weightings of each thermocouple • pressure difference over the fill height measured by the pressure measurement tap is independent of its location on the fill outlet plane provided the pressure measurement points are perpendicular to the air stream and are not against the walls.
AFRIKAANSE OPSOMMING: 'n 1.5 x 1.5 m² Teenvloei pakking werkverrigting toetsfasiliteit word in detail beskryf. Instrumentasie is gekies en geïnstalleer in die koeltoring pakking toetsfasiliteit en gekalibreer om akkuraatheid te verseker. 'n Fasiliteit beheer program is geskryf om die gebruik van die toetsfasiliteit te vereenvoudig. Die program het ‘n vriendelike gebruikers intervalk. Die program bereken outomaties die Merkel-getal en verlies koëffisiënte as mate van pakking termiese- en vloeiwerksverrigting. 'n Sproeiraam is ontwerp en vervaardig om uniforme water verspreiding aan die pakking te verseker. Die water verspreiding deur verskillende pakkings met verskillende pakking hoogtes en water vloei snelhede is gemeet. Die water aangeheg aan die mure van die toetsfasiliteit is ook ondersoek. Film, druppel en spat pakkings word in die opgegradeerde toetsfasiliteit getoets. Die film- en druppelpakking werksverrigting bepaal tydens die toetse is aanvaarbaar, aangesien hierdie pakkings minimale migrasie effekte het. Pakking met swak verspreiding effekte en 'n groot migrasie van water na die wande van die toetsfasiliteit, soos gevind met die spatpakking toetse, kan nie met akkuraatheid in 'n 1.5 x 1.5 m² toets seksie getoets word nie omdat die resultate nie die werkverrigting van die pakking verteenwoordig in 'n relatief groot koeltoring. Ander aspekte wat ondersoek was: • lugvloei uniformiteit • lug omleiding effeckte • die posisie van water in- en uitlaat temperatuur meetpunte • posisie van die drukmeetapparaat. Dit is vasgestel dat, in die huidige toetsfasiliteit • lugvloei eenvormigheid geskik is vir prestasietoetsing • lug omleiding effekte kan geïgnoreer word vir oop pakkings en kan verklein word vir digte pakkings deur spons tussen die pakking en mure te pak • water inlaat- en uitlaattemperature behoort gemeet te word in die pypwerk en lei tot 'n metings metode wat nie beïnvloed word deur die relatiewe gewigte van elke thermokoppel nie • die druk verskil gemeet deur die drupmeetpunte oor die pakkinghoogte is onafhanklik van hul posisie op die pakkinguitlaatvlak op voorwaarde dat die drukmeetpunte loodreg is teen die lugstroom en nie teen die mure nie.
Jacobs, Jessica. "Effect of post-treatment of cemented carbide : Microstructural investigation and evaluation of mechanical properties of cemented carbide inserts for rock tool applications." Thesis, Karlstads universitet, Avdelningen för maskin- och materialteknik, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-84628.
Повний текст джерелаHårdmetaller används i bergborrstift på grund av materialets fördelaktiga mekaniska egenskaper vilket innefattar en kombination av hög seghet, hårdhet och bra nötningsmotstånd. Hårdheten uppnås vanligen av volfram karbider (WC) medan segheten ges av en bindefas som oftast är baserad på cobolt (Co). För att få ett material med en bra balans mellan seghet och hårdhet så kan bindefasen stärkas genom en ytbehandling efter sintringen för att minimera risken för att borrstiftet går sönder under användning. I tidigare studier har det framkommit att ytcentrerad kubiskt tätpackad (FCC) cobolt stabiliseras av volfram som lösts i bindefasen. Spänningar som uppkommer på grund av detta har relaterats till vidare stabilisering av FCC-fasen, men även lokal omvandling till hexagonalt tätpackad (HCP) cobolt. Genom att utsätta borrstiften för mekanisk deformation, i.e. inducera spänningar, kan bindematerialet teoretiskt sett omvandlas från FCC till HCP. I detta examensarbete har fem bergborrstift med tre olika bindefassammansättningar undersökts. Därutöver har även inverkan av kolhalten och tillägget av ett legeringsämne utvärderats. Den primära metoden för att genomföra undersöka mikrostrukturen hos de sintrade och efterbehandlade stiften var bakåtspridd elektrondiffraktion (EBSD). Syftet med undersökningen var att öka förståelsen kring bindefasens fasstabilitet då den utsatts för en efterbehandlingsprocess. Även magnetisk mätning, hårdhetstestning och mekanisk prövning utfördes på materialen för att kunna jämföra de olika bindefassammansättningarna mot varandra. Resultaten visade att en låg kolhalt gav ett material med mindre och mer rundade WC korn samt att bindefasen dominerades av FCC-Co jämfört mot ett material med samma bas och hög kolhalt. Därtill uppvisade materialen med låg kolhalt bättre nötningsmotstånd. Legeringen av bindefasmaterialet visade en ökning i ythårdhet efter efterbehandling och gjorde materialen mer nötningsbeständiga än de icke-legerade materialen. De icke-legerade materialen visade däremot på högre krosstyrka. Materialet med en järn-baserad bindefas påvisade minst ökning av ythårdheten och högst ökning samt högsta värde på krosstrykan. Samtliga material visade en förfining av WC kornen och en ökning av ythårdheten efter efterbehandlingen. Endast ett material indikerade omvandling från FCC till HCP, inga slutsatser kunde dras från de övriga proverna.
Danielsson, Olivia. "Effect of carbon activity on microstructure evolution in WC-Ni cemented carbides." Thesis, KTH, Materialvetenskap, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-226566.
Повний текст джерелаPolo, Montes Carlos A. "The effect of cementation technique on the retention of adhesively cemented prefabricated posts." Thesis, Birmingham, Ala. : University of Alabama at Birmingham, 2007. https://www.mhsl.uab.edu/dt/2007m/polomontes.pdf.
Повний текст джерелаJuirnarongrit, Teerawut. "Effect of diameter on the behavior of laterally loaded piles in weakly cemented sand /." Diss., Connect to a 24 p. preview or request complete full text in PDF format. Access restricted to UC IP addresses, 2002. http://wwwlib.umi.com/cr/ucsd/fullcit?p3071009.
Повний текст джерелаMiner, Dustin David. "The Effect of Flowable Fill on the Lateral Resistance of Driven-Pile Foundations." Diss., CLICK HERE for online access, 2009. http://contentdm.lib.byu.edu/ETD/image/etd3308.pdf.
Повний текст джерелаCelestin, Henry Jean Claude. "Geotechnical properties of cemented paste backfill and tailings liners: Effect of mix components and temperature." Thesis, University of Ottawa (Canada), 2009. http://hdl.handle.net/10393/28080.
Повний текст джерелаMohsin, AKM. "AUTOMATED Gmax MEASUREMENT TO EXPLORE DEGRADATION OF ARTIFICIALLY CEMENTED CARBONATE SAND." Thesis, The University of Sydney, 2008. http://hdl.handle.net/2123/5003.
Повний текст джерелаMohsin, AKM. "AUTOMATED Gmax MEASUREMENT TO EXPLORE DEGRADATION OF ARTIFICIALLY CEMENTED CARBONATE SAND." University of Sydney, 2008. http://hdl.handle.net/2123/5003.
Повний текст джерелаSoil Stiffness is an important parameter for any geotechnical engineering design. In laboratory tests it can be derived from stress-strain curves or from dynamic measurement based on wave propagation theory. The second method is a more accurate and direct method for measuring stiffness at very small strains. Until now dynamic measurements have usually been obtained manually from the triaxial test. Attempts have been made to automate the procedure but have apparently failed due to the high level of variability in dynamic measurements. Moreover, triaxial tests of soil can be very lengthy and manual dynamic measurements can be very tedious and impractical for long stress-path tests. In this research a computer program has been developed to automate the stiffness measurement (using bender elements) based on the cross- correlation technique. In this method the program records all the peaks and corresponding arrival times in the cross-correlation signal during the test. The stiffness is calculated and displayed on the screen continuously. The Bender Element enabled to get the small strain shear modulus. An arbitrary “Chirp” waveform of 4 kHz frequency was used for this purpose. Subsequently Bender Element test results were checked by ‘Sine’ waveforms of frequencies 5kHz to 20kHz, as well as by manual inspection of the arrival time. This thesis discusses the method and some of the difficulties in truly automating the process. Finally some results from a number of stress path tests on uncemented and cemented calcareous sediments are presented. Bender elements have been used by many researchers to determine the shear modulus at small strain. Most previous studies have used visual observation of arrival time, which is time consuming and often requires some judgement from the operator. This thesis will describe the use of cross-correlation as a method for automation of Gmax measurement. Cross-correlation has been claimed to be unreliable in the past. However, it will be shown that provided several peaks in the cross-correlation signal are monitored it is possible to follow the variation of Gmax throughout consolidation and shearing. The measurement can be made at regular intervals within the software controlling a stress-path apparatus. Details of the apparatus used and practical considerations including selection of waveform and frequency are discussed. A series of drained cyclic triaxial tests was carried out on artificially cemented and uncemented calcareous soil of dry unit weights 13, 15, and 17 kN/m3 and sheared with constant effective confining stress 300 kPa. Gypsum cement contents of 10%, 20% and 30% of the dry soil weight were used. In addition a series of stress path tests were performed on Toyuora sand samples. Results will be presented for two uncemented and one cemented sand. In addition to the bender elements, all tests had internal instrumentation to monitor axial and lateral strains. Results will be presented for Toyura sand to show that the measurements are consistent with those obtained by other methods. Results will also be presented for carbonate sand subjected to a wide range of stress paths. Finally, results will be presented for the carbonate sand cemented with gypsum. The degradation of Gmax of the cemented soil subjected to variety of monotonic and cyclic stress-paths is presented. Analysis of the results includes assessment of the factors influencing Gmax for uncemented sand. Preliminary analysis indicates that in order of importance these are the mean effective stress, the stress history, void ratio and stress ratio. For cemented sand, Gmax is initially constant and independent of stress path. After yielding the modulus degrades, becoming increasingly stress level dependent and eventually approaches the value for uncemented sand. Factors influencing the rate of degradation are discussed. For the Toyuora sand samples the effects of end restraint on the stress-strain response at small strains were investigated. The conventional method of mounting triaxial specimen has the effect of introducing friction between sample and end platen during a compression test. This inevitably restricts free lateral movement of the specimen ends. Frictional restraint at the sample ends causes the formation of 'dead zones' adjacent to the platens, resulting in non-uniform distribution of stress and strain (and of pore pressure if undrained). On the other hand the specimen with 'free' ends maintain an approximate cylindrical shape instead of barrelling when subjected to compression, resulting in a more uniform stress distribution.
Longpradit, Panchan. "Effect of substrate pretreatment on CVD diamond coated cemented tungsten carbide tools for wood cutting application." Thesis, University of Nottingham, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.326525.
Повний текст джерелаBrumby, Scott Andrew. "The effect of surface roughness and a collar on fixation of cemented femoral stems in vivo /." Title page, table of contents and summary only, 1996. http://web4.library.adelaide.edu.au/theses/09PH/09phb8934.pdf.
Повний текст джерелаBarker, D. S. "A numerical analysis of the effect of surface finish and cement creep in cemented total hip replacement /." Title page, abstract and contents only, 1996. http://web4.library.adelaide.edu.au/theses/09ENS/09ensb255.pdf.
Повний текст джерелаDhakal, Pashupati. "NUMERICAL INVESTIGATIONS OF THE EFFECT OF FILL FACTOR IN AN INTERNAL MIXER FOR TIRE MANUFACTURING PROCESS." University of Akron / OhioLINK, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=akron1466964421.
Повний текст джерелаAhmed, Istiaque. "NON-ISOTHERMAL NUMERICAL INVESTIGATIONS OF THE EFFECT OF SPEED RATIO AND FILL FACTOR IN AN INTERNAL MIXER FOR TIRE MANUFACTURING PROCESS." University of Akron / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=akron1524584349185209.
Повний текст джерелаLittle, Lauren M. "INVESTIGATING THE EFFECT OF STRESS, WETTING, AND COMPACTION ON SETTLEMENT POTENTIAL OF MINE SPOILS." UKnowledge, 2008. http://uknowledge.uky.edu/gradschool_theses/525.
Повний текст джерелаPark, Bongcheol. "Effect of cavity pre-fill and geometry on flow patterns and air entrapment in the die cavity in cold chamber die casting /." The Ohio State University, 2001. http://rave.ohiolink.edu/etdc/view?acc_num=osu1486399451963137.
Повний текст джерелаMahal, Raj-Deep Singh. "A standardized approach to determine the effect of thermocycling and long term storage on the shear bond strength of orthodontic brackets cemented to bovine enamel." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape4/PQDD_0021/MQ53415.pdf.
Повний текст джерелаJAIN, NAVEEN KUMAR. "EFFECT OF CEMENTED FILL ON STRENGTH OF JOINTED SPECIMEN." Thesis, 2015. http://dspace.dtu.ac.in:8080/jspui/handle/repository/14368.
Повний текст джерелаTeye, Vida Dede. "The effect of fill density on rectal balloon dosimetry." 2013. http://liblink.bsu.edu/uhtbin/catkey/1713805.
Повний текст джерелаLiterature review -- Interaction of radiation with matter -- Radiation dosimetry -- Materials and methods -- Results -- Discursion.
Access to thesis permanenty restricted to Ball State community only.
Department of Physics and Astronomy
Peng, Yang-Ching, and 彭揚景. "Investigation of the effect of cobalt concentration on the grindability of cemented carbide." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/36712686547623951853.
Повний текст джерела淡江大學
機械與機電工程學系碩士班
100
Glass molding process (GMP) is regarded as a very promising technique for mass producing high precision optical components such as spherical/aspheric glass lenses and free-form optics. However, only a handful of materials can sustain the chemical reaction, mechanical stress and temperature involved in the glass molding process and almost all of these mold materials are classified as hard-to-machine materials. This makes the machining of these materials to sub-micrometer form accuracy and nanometer surface finish a rather tough and expensive task. Amongst those handful choices, tungsten carbide (WC) is by far the most commonly used mold material in GMP industry. WC, also known as sintered/cemented WC with cobalt (Co) binder, is a metal matrix composite of WC particles and Co matrix. Cobalt concentration plays an important role in shaping mechanical properties of the obtained WC/Co materials. This research aimed to investigate the effect of Co concentration on the grindability of WC/Co materials. Efforts have been made to correlate grinding parameters such as spindle speed, cut depth and feed to the obtained surfaces. It is found that, despite of higher hardness values, better surface finish can be achieved on WC/Co specimen of lower Co concentration. In the present study, surface roughness (Ra) values better than 5nm and 10nm were obtained on WC/Co specimens of 0~3% and 6~13% Co concentrations respectively.
Zhi-Huang, Juan, and 簡志晃. "Effect of Fill/Postfill Switch on the Quality of In jection olded Plastics." Thesis, 1995. http://ndltd.ncl.edu.tw/handle/21464462925657940089.
Повний текст джерелаChien, Cheng-hao, and 簡誠浩. "Effect of fill-in material in a flaw in pile on wave propagation." Thesis, 1996. http://ndltd.ncl.edu.tw/handle/16418819246725428145.
Повний текст джерелаBahorich, Benjamin Lee. "Examining the effect of cemented natural fractures on hydraulic fracture propagation in hydrostone block experiments." Thesis, 2012. http://hdl.handle.net/2152/ETD-UT-2012-08-6394.
Повний текст джерелаtext
Sun, Kuang-Tung, and 孫光東. "Effect of Setback Distance on Loading Behavior of Shallow Foundation in a Poorly Cemented Sandstone." Thesis, 2004. http://ndltd.ncl.edu.tw/handle/31612276926453634638.
Повний текст джерела國立交通大學
土木工程系所
92
This study aims to investigate the effect of setback distance on the loading behaviors of the shallow foundation located on the crest of a slope of poorly cemented sandstone. Based on the loading curves and the phenomena of crack development during loading, the effect of setback distance of foundation bearing stress and the failure mechanisms are explored. From the observation, the foundation rock after failure can be categorized into three zones, the triangular active zone beneath the footing, the outer passive zone near the free surface and the transition zone between both. For a footing located on a horizontal ground, a symmetric failure mode with respect to the footing is observed at the foundation rock. Due to the existence of a slope, the failure mode of foundation rock for the footing located on a crest of an inclined ground is different with the footing on a horizontal surface. Because the volume of active zone at the slope side is less than that in the side of level ground, major fractures are developed at the active zone of the slope side. Consequently, the passive and transition zones connect and induce ruptures in the slope side. The ultimate bearing stress measured is due to lack of lateral support at the slope side, meanwhile the rock in the level ground side does not contribute to the bearing stress. Based on the experimental results, the fact reflects that the bearing capacity of the foundation on the slope crest varies with its setback distance. The bearing capacity increases with the increase of setback distance. The slope will not influence the bearing capacity while the failure surface does not extend to the slope. According to the results of loading tests conducted in this study, the bearing capacity is independent of the slope when the setback stance is more than 3 times of the width of the foundation (15 cm). Keywords : artificial poorly cemented sandstone , soft rock, foundation model for loading test , failure mechanism, setback distance, active zone, passive zone, transition zone, intact zone
Lee, Chun-wei, and 李俊葦. "Unconfined compression test on Fiber-Reinforced Cemented Silt: Effect of Cement on Fiber Bonding Strength." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/77710101265756948487.
Повний текст джерела國立臺灣科技大學
營建工程系
104
Marginal soils (i.e., silt and clay) have not been a preferred option of a backfill material for reinforced soil structures due to its low shear strength and permeability. In this research, fiber-reinforced silt (FRS) and fiber-reinforced cemented silt (FCS) were studied as a measure of improving the stability of reinforced soil structures backfilled with marginal soil. A series of triaxial unconfined compression tests are perform to investigate the effect of adding polypropylene (PP) fibers and cement on the shear behavior and failure mode of silty soil subject to undrained loadings. The test variables considered in this study are fiber content (0, 1, 2, 3%), fiber length (6, 12, 19 mm) and cement content (0, 5%). The specimens were prepared at a maximum dry unit weight and optimum moisture content based on standard proctor compaction test results. For FCS specimens, the 7 day curing strength was obtained and compared in this study. The experimental results revealed that adding fiber and cement substantially increased the undrained shear strength and reduced the loss of post peak strength of the reinforced soil. The failure mode steadily transformed from brittle to ductile type as the fiber content increased. Test results also indicated that the modulus of FRS under working stress conditions (at 2% of axial strain) decreased as fiber content increased but increased as fiber length increased. Regardless of fiber content and length, the modulus of FRS is less than that of unreinforced silt, whereas the modulus of FCS is larger than that of unreinforced silt. The improvement of undrained shear strength as a result of cement-induced extra boning strength was determined by quantifying the strength increment between FRS and FCS specimens. The analytical results suggested that for reinforced specimens with 2 and 3% of fiber content the strength improvement from the contribution of cement-induced extra boning strength is larger than that from the contribution of fiber alone. This observation demonstrated the significance of adding cement as an adhesive to improve the bonding strength between fiber and soil matrix. As a result, higher fiber tensile strength could be mobilized and contributed to the increase of overall undrained shear strength of reinforced soil. Images acquired from scanning electron microscope (SEM) also provided clear visual evidences of soil-fiber interaction improved by adding cement.
Wang, Bor-Hau, and 王柏皓. "Effect of Slope Inclination on the Loading Behavior of Shallow Foundation In a Poorly Cemented Sandstone." Thesis, 2004. http://ndltd.ncl.edu.tw/handle/6f3dg7.
Повний текст джерела國立交通大學
土木工程系所
92
This thesis aims to investigate the loading behavior of shallow foundation in poorly cemented sandstone on slope crest where slope angles are 10 degree,20 degree and 30 degree . In this thesis, an artificial soft rock was developed as the foundation material. The mechanical behavior of the artificial rock is analogous to the natural sandstone. A set of laboratory loading equipments for foundation model was assembled. The samples were prepared and loaded in a steel box with the dimension of 60 cm x 30 cm x 65 cm. To observe the fracturing of the specimen during test, a observed window was made on the upper and central part of one of the wall of the box using high strength glasses . Then, twelve sets of model loading tests were performed in the laboratory. Base on these tests, not only the bearing capacity but also the mechanisms of progressive failure are investigated by image processing analysis. We explore the behavior of the shallow foundation of poorly cemented sandstone by the progressive failure and the analyzed results. To prepare the model material the sandstone was first gently crushed and ground in order to appropriately represent actual grain size distribution of the natural sandstone. After grinding, the rock grains passing #30 sieve and retaining on the #200 sieve were adopted as the basic model material. The solution passing #200 sieve was used as the cementing material for producing the artificial soft rock model. The particles and the solution with fines were mixed thoroughly with the ratio of 1:1 by volume. After that, their mixture was poured into a model container. The load on the specimen was slowly increased up to 250 tons step by step. After the consolidation stage completed, the specimen was extruded from the container and was exposed to electric fans for three weeks to produce an air-dried specimen; Then the specimen was ready for a load bearing tests. The results of model bearing test on slope crest indicate that a load-settlement curve is analogous to that on horizontal specimens. It also can be roughly divided into the incipient stage, the linear stage, the non-linear stage, and the final stage. The peak point of the load-settlement curve is the ultimate stress and decreases varies with slope angles. Generally speaking, the bearing capacity of 10 degree slope is approximately about 91 percent of horizontal specimens; the bearing capacity of 20 degree slope is approximately about 79 percent of horizontal specimens; the bearing capacity of 30 degree slope is approximately about 63 percent of horizontal specimens. At the incipient stage, the specimens have no obvious cracks. And at the linear stage , cracks just beneath both edges of footing could be observed, these cracks were likely due to the stress concentration near both footing edges and extended outward with the increasing bearing load. At the non-linear stage, as the cracks grows completely, it reaches the peak point of the load-settlement curve and an active zone right under the foundation base was clearly formed. At the failure stage, the active zone slide toward the slope faces and the bearing stress decreases. After tests, the failure zones and mechanism were also identified. Failure zones were divided into the active zone, the transitional zone, and the passive zone. Not only the horizontal specimens but the inclination specimens, it was found that the bearing behavior on poorly cemented sandstone is distinct from the cases on hard rock or soil, with both plasticity and brittle characteristics. The bearing capacity formulas commonly used for soil or hard rock is not necessarily suitable for the case of poorly cemented soft sandstone.
Barker, D. S. "A numerical analysis of the effect of surface finish and cement creep in cemented total hip replacement." Thesis, 1996. http://hdl.handle.net/2440/120735.
Повний текст джерелаJamali-Firouz-Abadi, Maryam. "Effect of Binder Content and Load History on the One-dimensional Compression of Williams Mine Cemented Paste Backfill." Thesis, 2012. http://hdl.handle.net/1807/35326.
Повний текст джерелаAlhaddad, Abdulrahman Jafar M. "Effect of real time aging and cyclic fatigue on fused and cemented machined veneers to Y-TZP zirconia." Thesis, 2016. https://hdl.handle.net/2144/18657.
Повний текст джерелаSahoo, Biranchi Narayan. "Effect of Cryogenic Treatment of Cemented Carbide Inserts on Properties & Performance Evaluation in Machining of Stainless Steel." Thesis, 2011. http://ethesis.nitrkl.ac.in/2811/1/PRINT.pdf.
Повний текст джерелаBrumby, Scott Andrew. "The effect of surface roughness and a collar on fixation of cemented femoral stems in vivo / by Scott Andrew Brumby." Thesis, 1996. http://hdl.handle.net/2440/18921.
Повний текст джерелаxiii, 206 leaves : ill. (chiefly col.) ; 30 cm.
This thesis investigates the effect of femoral stem surface roughness and a collar on the fixation of cemented hip hemi-arthroplasty femoral stems in an in vivo sheep model up to nine months following implantation. Plain radiography, micromotion between prosthesis and bone during mechanical testing and histology are used.
Thesis (Ph.D.)--University of Adelaide, Dept. of Orthopaedics and Trauma, 1997?
"Effect of Series Resistance Increase on Fill Factor of PV Cells Extracted from Field Aged Modules of Different Climates." Master's thesis, 2016. http://hdl.handle.net/2286/R.I.40306.
Повний текст джерелаDissertation/Thesis
Masters Thesis Mechanical Engineering 2016
El-Ebrashi, Sameh Kamal. "The effect of coping/die fit of procera aluminum oxide copings cemented with different cements a thesis submitted in partial fulfillment ... for the degree of Master of Science in Prosthodontics ... /." 1998. http://catalog.hathitrust.org/api/volumes/oclc/68800579.html.
Повний текст джерелаHifeda, Nedda. "Bond strength between veneer porcelains and CAD/CAM ceramic to CP titanium and evaluation of fracture load and effect of aging on low fusing porcelain fired over CP TI and CAD / CAM materials cemented onto CP TI." Thesis, 2016. https://hdl.handle.net/2144/18673.
Повний текст джерела2018-09-28T00:00:00Z
(8848484), Arturo Garcia. "EXPERIMENT AND MODELING OF COPPER INDIUM GALLIUM DISELENIDE (CIGS) SOLAR CELL: EFFECT OF AXIAL LOADING AND ROLLING." Thesis, 2020.
Знайти повний текст джерела