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Dissertations / Theses on the topic 'Crushed rock'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 July 2025

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1

Paterson, James P. H. "Species establishment and vegetation development on crushed rock substrates." Thesis, University of Ulster, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.274546.

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2

Ouyang, Shoung. "Sealing performance assessments of bentonite and bentonite/crushed rock plugs." Diss., The University of Arizona, 1990. http://hdl.handle.net/10150/185275.

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Bentonite and mixtures of bentonite and crushed rock are potential sealing materials for high level nuclear waste repositories. The materials have been used to form cap layers to reduce infiltration for mined waste tailings and can also be used to construct clay liners for municipal as well as industrial waste managements. This study includes a systematic investigation of the sealing performance of bentonite and bentonite/crushed rock plugs under diverse conditions. American Colloid C/S granular bentonite and Apache Leap tuff have been mixed to prepare samples for laboratory flow testing. Bent

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3

Myers, William Scott Elton David J. "Dewatering rock crushing fines using geotextile tubes." Auburn, Ala., 2010. http://hdl.handle.net/10415/2033.

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4

Yeo, Yang Sheng. "Characterisation of cement-treated crushed rock basecourse for Western Australian roads." Thesis, Curtin University, 2011. http://hdl.handle.net/20.500.11937/2277.

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Cement treatment for pavement basecourse materials results in the creation of cement treated basecourse which is either classified as "modified" or "stabilised". The two classifications perform differently in service, with susceptibility to fatigue being the most obvious characteristic delineating the two. This classification methodology is currently quantified based on Unconfined Compressive Strength (UCS) ranges.Throughout the 1990s to the early 2000s, Main Roads Western Australia (MRWA) has investigated various basecourse products created by adding cement. However, due to unexpected behavio

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5

McLauchlan, Nathaniel Ross. "Crushed rock thermal energy storage & nuclear technology : option space & economic impacts." Thesis, Massachusetts Institute of Technology, 2018. http://hdl.handle.net/1721.1/117794.

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Thesis: S.M. in Technology and Policy, Massachusetts Institute of Technology, School of Engineering, Institute for Data, Systems, and Society, 2018.<br>Thesis: S.M., Massachusetts Institute of Technology, Department of Nuclear Science and Engineering, 2018.<br>This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.<br>Cataloged student-submitted from PDF version of thesis.<br>Includes bibliographical references (pages 101-103).<br>Increasing amounts of intermittent renewables have led to zero and negativ

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6

Williams, J. R. (James Robert) 1960. "THE SEALING PERFORMANCE OF BENTONITE/CRUSHED ROCK BOREHOLE PLUGS (NUCLEAR, BASALT, WASTE, REPOSITORY)." Thesis, The University of Arizona, 1986. http://hdl.handle.net/10150/275560.

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7

Ceruti, Portia Odessyl. "Crushed rock and clay amelioration of a nutrient decifient, sandy soil of Maputaland." Master's thesis, University of Cape Town, 1999. http://hdl.handle.net/11427/9881.

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Bibliography: leaves 57-62.<br>Various studies have suggested the possibility that food derived through subsistence agriculture in the Mseleni region of Maputaland contributes to malnutrition within the local community, particularfy within the high proportion of the population which suffers from a severe, disabling form of osteoarthritis. This study was conducted to determine if the application of local crushed rock or black clay to these nutrient deficient, sandy soils would increase available nutrient concentrations and improve the growth of plants in the ameliorated soil.

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8

Abbasi, Vahid. "Short and long term behaviour of assemblages of crushed rock particles in oedometer compression." Doctoral thesis, Université Laval, 2016. http://hdl.handle.net/20.500.11794/27288.

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Au cours des dernières décennies, un noyau plutôt mince supporté par des épaulements en enrochement a été le modèle le plus économique et sans danger pour les barrages. Plusieurs rapports d'inspection de tassement et de déformation des barrages en enrochement au cours de la mise en eau et le fonctionnement de ces structures. Les tassements rapides ont été associés à la mise en eau. Cependant, la pression hydrostatique peut également contribuer à des changements considérables dans les déformations volumétriques au début de fonctionnement de barrages en amont. Le premier objectif de cette thèse

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9

Massey, S. W. "Investigation of the in-service performance of crushed rock aggregates in bituminous macadam wearing courses in S.W. England." Thesis, University of Hertfordshire, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.370943.

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10

Chummuneerat, Suphat. "Performance, evaluation, and enhancement of hydrated cement treated crushed rock base (HCTCRB) as a road base material for Western Australian roads." Thesis, Curtin University, 2014. http://hdl.handle.net/20.500.11937/884.

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Hydrated Cement Treated Crushed Rock Base (HCTCRB) is produced by mixing a standard crushed rock base with 2% cement (by mass) and water then a re-mixing process is performed after the specific hydration period. This technique improves the engineering characteristics of the materials while still maintain the unbound properties. Performance evaluation of HCTCRB was investigated with variation of factors during manufacturing and construction. Finally, the experimental results were implemented for the pavement analysis and design.

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11

Haji, Hassan Yasin, and Younes Beigi. "Ersättning av naturgrus med krossat berg i betong." Thesis, Högskolan i Borås, Akademin för textil, teknik och ekonomi, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:hb:diva-13846.

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Betong är ett av de mest använda byggnadsmaterialen i världen. Den består av en blandning av cement, vatten och ballast. Ballasten utgör cirka 65-75 % av betongmassan. Merparten av denna ballast kommer i nuläget från naturgrus. En ersättning av naturgrusballasten är önskvärd i enlighet med Regeringens miljömål för ”Grundvatten av god kvalitet” som innebär att uttaget på naturgrus ska minskas till 1-3 miljoner ton/år fram till år 2020. Detta examensarbete fokuserar på att testa ersätta naturgrus med krossberg i betong. Målet var att få likvärdiga egenskaper i den nya betongblandningen både när

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12

Horta, Andre. "Impacts of Using Crushed Rocks in Concrete." Thesis, KTH, Teknisk geologi och geofysik, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-96093.

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Concrete in Sweden has traditionally been manufactured with natural aggregate from glaciofluvial eskers. There is a need to preserve the remaining eskers because of their cultural value and importance for water filtration, thus natural aggregate has to be replaced. The most realistic alternative is to use crushed rocks. The major problem with crushed rocks in concrete production is the workability. This is because crushed rocks have less favorable properties. The fragments are flakier and have a rougher surface than natural aggregates that have been rounded in water. Without any amelioration o

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13

Siripun, Komsun. "Characterisations of base course materials in Western Australia pavements." Thesis, Curtin University, 2010. http://hdl.handle.net/20.500.11937/960.

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Western Australia (WA) has a road network of approximately 177,700 km, including a 17,800 km stage highway system (Main Roads Western Australia 2009). This infrastructure supports a population of only about two million, and road funds always have to be carefully considered when allocated to highway authorities or other organisations. Pavement design is a process intended to find the most economical combination of suitable materials and layer thicknesses for construction. The pavement must have a carefully-specified unbound granular base to further reduce construction costs, and must be surface

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14

Bearman, Richard Anthony. "The application of rock mechanics parameters to the prediction of crusher performance." Thesis, University of Exeter, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.334395.

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15

Li, Huiqi. "Discrete element method (DEM) modelling of rock flow and breakage within a cone crusher." Thesis, University of Nottingham, 2013. http://eprints.nottingham.ac.uk/14528/.

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A cone crusher is a crushing machine which is widely used in the mining, construction and recycling industries. Previous research studies have proposed empirical mathematical models to simulate the operational performance of a cone crusher. These models attempt to match the size distributions of the feed and product streams. The flow of the rock and its breakage within the cone crusher chamber are not explicitly modelled by these methods. Moreover, the ability to investigate the changes in crusher performance affected by changes to the crusher design geometry and/or operating variables (includ

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16

Donovan, James George. "Fracture Toughness Based Models for the Prediction of Power Consumption, Product Size, and Capacity of Jaw Crushers." Diss., Virginia Tech, 2003. http://hdl.handle.net/10919/28544.

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There is little process control employed at aggregate crushing plants and essentially no optimization at the primary or jaw crushing stage. Jaw crusher selection is very dependent on the subjective judgment/experience of individuals, the characterization of rock material using inadequate and unrepresentative tests, and the desire to limit secondary breakage, resulting in the conservative selection and operation of jaw crushers. A method for predicting the power consumption, product size, and volumetric capacity of jaw crushers based on fracture toughness has been proposed in this study. A n

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17

ENGIDASEW, TESFAYE ASRESAHAGNE. "Engineering geological characterization of volcanic rocks of ethiopian and sardinian highlands to be used as construction materials." Doctoral thesis, Università degli Studi di Cagliari, 2014. http://hdl.handle.net/11584/266456.

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This thesis presents the results of the study conducted on the “Geoengineering characterization of volcanic rocks from Ethiopian and Sardinian highlands to be used as construction materials”. Though, the two project areas are geographically far apart, both are partly covered with volcanic rocks mainly consisting of basic and subordinate felsic rocks. The research was conducted in two countries; part I, the Ethiopian Project area located on the northwestern central Highlands of the Amhara regional state. It is characterized by rugged topography being situated on the western margin of the

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18

Wojtowicz, Maria. "Macro composites for crushing - additive manufacturing of hard phase : Development and testing of macro composites for crushing purposes." Thesis, Uppsala universitet, Tillämpad materialvetenskap, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-447459.

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During this master thesis a crushing material composite was developed in order to determine if a specific design consisting of a pointy hard phase with a ductile phase in between can reduce the load needed to crush stone and therefor decrease the energy consumption during stone crushing. The steel hard phase (ASP 2012) was printed using an additive manufacturing method called selective laser melting (SLM). A process parameter optimization was performed in order to achieve a dense material and a pre-heated building platform was used to prevent cracking. The hard phase designs were printed and t

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19

Kuo, Ming-Feng, and 郭明峰. "The compaction properties of bentonite-crushed rock mixtures." Thesis, 2004. http://ndltd.ncl.edu.tw/handle/01206428355926158042.

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碩士<br>國立中央大學<br>土木工程研究所<br>92<br>Buffer materials are used to retard the migration of radionuclides emitted from high level wastes in a repository. Bentonite is the primary candidate for the buffer materials at the present day. The uniaxial compaction method is generally used to produce the bentonite block. The wall friction is produced between the materials and the compaction mold during the compaction process, so we can’t obtain the relationship between the actual compaction stress and the density of the bentonite block. The first target for this study is to search the literature of compacti

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20

Lee, Ming-Jan, and 李明仁. "The Influence of Crushed-Rock Gradation on the Swelling Behavior of Backfill Materials." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/39954748871099063277.

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碩士<br>淡江大學<br>土木工程學系碩士班<br>95<br>Before closure of the radioactive waste repository, all the connecting shafts and rooms in a deep geological disposal are required to be backfilled. The backfill is proposed to consist of a mixture of 30% bentonite and 70% field crushed rock. The bentonite within the crushed rock is to be compacted to a high density to ensure sufficient swelling upon wetting to seal the voids. The Fuller maximum density curve is employed for the aggregates to achieve the optimal compaction property of backfill materials. However, the distribution of voids within the backfill ma

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21

Snížek, Petr. "Změny vnitřní stavby klastických sedimentárních hornin při zkoušce Schmidtovým kladivem." Master's thesis, 2013. http://www.nusl.cz/ntk/nusl-321071.

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iv Summary Schmidt hammer is the instrument which is used for the assessment of rock mechanical properties and this instrument is classified as the indirect method. This method is based on the assessment of rebound value (R) of the Schmidt hammer, which is measurred by the amount of rebound of the impact plunger from the surface of tested rock. Schmidt hammer is called as the non-destructive method of rock assessment and it is called as in situ testing method as well. The main objective of this work is provement, that Schmidt hammer testing is destructive method and define degree of damage whi

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22

Rembuluwani, Ndivhudzanyi. "Development of an integrated approach of dealing with challenges of selected small-scale rock aggregate mines in Vhembe District, Limpopo Province, South Africa." Diss., 2016. http://hdl.handle.net/11602/829.

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23

Watson, Bryan Philip. "Rock behaviour of the Bushveld Merensky Reef and the design of crush pillars." Thesis, 2011. http://hdl.handle.net/10539/9629.

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PhD, Faculty of Engineering and the Built Environment, University of the Witwatersrand, 2010<br>The aim of this investigation was to provide a proper design procedure for Merensky crush pillars, based primarily on underground measurements. Three sites with a variety of geotechnical conditions were selected. An interaction between the pillars and the rock mass around the stopes was shown by the literature, relevant laboratory tests and numerical modelling. During the investigations, nonlinear rock behaviour was observed at one of the sites. Further studies revealed that nonlinear behaviou

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24

Čermák, Martin. "Vztah mezi petrografickými charakteristikami a vybranými technologickými vlastnostmi klastických sedimentárních hornin pro výrobu drceného kameniva." Master's thesis, 2012. http://www.nusl.cz/ntk/nusl-305674.

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This diploma thesis is focused on the finding and describing of the relationships between petrological parameters and technological properties of rocks used for the production of aggregates (crushed stone). Rock specimens were selected from a geological area of Culm (Lower Carboniferous age) in the area of Nízký Jeseník Mts. and Drahanská vrchovina uplands in the Czech Republic. Studied localities were selected on the basis of the current quarrying operations and also to represent the different strata. The six studied localities encompass Kobylí, Chabičov, and Bělkovice where Horní Benešov for

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