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Dissertations / Theses on the topic 'Geopolymer concrete'

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Published: 4 June 2021
Last updated: 25 July 2025

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1

Lo, Xin Yin. "Analysis and reproduction of geopolymer concrete." Thesis, Massachusetts Institute of Technology, 2020. https://hdl.handle.net/1721.1/127289.

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Thesis: M. Eng., Massachusetts Institute of Technology, Department of Civil and Environmental Engineering, May, 2020<br>Cataloged from the official PDF of thesis.<br>Includes bibliographical references (page 36).<br>Geopolymers are inorganic polymers based on aluminosilicates that are produced from synthesizing pozzolanic compounds or aluminosilicate source materials with highly alkaline solutions. Geopolymer concrete is a stronger, more durable and more environmentally friendly alternative to ordinary Portland cement (OPC) concrete. Based on Joseph Davidovits' recipe for geopolymer concrete,
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2

Matenda, Amanda Zaina. "GEOPOLYMER CONCRETE PRODUCTION USING COAL ASH." OpenSIUC, 2015. https://opensiuc.lib.siu.edu/theses/1654.

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Coal powered power plants account for more than 40 percent of the electricity production of the United States. The combustion of coal results in a large number of solid waste materials, or coal combustion byproducts (CCBs). These waste materials are stored in landfill or ponds. The construction industry is heavily reliant on concrete which is used to make the building blocks for any type of structures, bricks. Concrete is a composite material made of a binder and coarse and fine aggregate. The most widely used binder in concrete production is Ordinary Portland Cement (OPC). Since cement manufa
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3

Hardjito, Djwantoro. "Studies of fly ash-based geopolymer concrete." Thesis, Curtin University, 2005. http://hdl.handle.net/20.500.11937/634.

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The use of Portland cement in concrete construction is under critical review due to high amount of carbon dioxide gas released to the atmosphere during the production of cement. In recent years, attempts to increase the utilization of fly ash to partially replace the use of Portland cement in concrete are gathering momentum. Most of this by-product material is currently dumped in landfills, creating a threat to the environment. Geopolymer concrete is a ‘new’ material that does not need the presence of Portland cement as a binder. Instead, the source of materials such as fly ash, that are rich
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4

Hardjito, Djwantoro. "Studies of fly ash-based geopolymer concrete." Curtin University of Technology, Dept. of Civil Engineering, 2005. http://espace.library.curtin.edu.au:80/R/?func=dbin-jump-full&object_id=18580.

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The use of Portland cement in concrete construction is under critical review due to high amount of carbon dioxide gas released to the atmosphere during the production of cement. In recent years, attempts to increase the utilization of fly ash to partially replace the use of Portland cement in concrete are gathering momentum. Most of this by-product material is currently dumped in landfills, creating a threat to the environment. Geopolymer concrete is a ‘new’ material that does not need the presence of Portland cement as a binder. Instead, the source of materials such as fly ash, that are rich
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5

Deb, Partha Sarathi. "Durability of fly ash based geopolymer concrete." Thesis, Curtin University, 2013. http://hdl.handle.net/20.500.11937/2126.

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Inclusion of ground granulated blast furnace slag (GGBFS) together with fly-ash can have significant effects on the development of mechanical and durability properties of geopolymer concrete when cured at normal temperature. The slag blended geopolymer concretes showed durability properties comparable to those of the control OPC concrete. In general, the results show that it is possible to design fly ash and slag blended geopolymer concrete suitable for ambient curing with similar or better durability properties of conventional OPC concrete.
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6

Neupane, Kamal. "Investigation of Structural Behaviour of Geopolymer Prestressed Concrete Beam." Thesis, The University of Sydney, 2020. https://hdl.handle.net/2123/24951.

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Production of ordinary Portland cement (OPC) is a carbon-intensive process that generates significant amounts of carbon dioxide (CO2) gas from the combustion of fossil fuels and thermal decomposition of limestone. Overall, cement industries are responsible for around 7% of global CO2 emissions which poses a considerable threat to global climate change because of its greenhouse effects. Geopolymer is an inorganic polymer material having similar binding properties to OPC which can be produced from aluminosilicate compounds, such as fly ash when activated by alkaline solution. The recent advent o
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7

Chang, Ee Hui. "Shear and bond behaviour of reinforced fly ash-based geopolymer concrete beams." Thesis, Curtin University, 2009. http://hdl.handle.net/20.500.11937/468.

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Concrete is by far the most widely used construction material worldwide in terms of volume, and so has a huge impact on the environment, with consequences for sustainable development. Portland cement is one of the most energy-intensive materials of construction, and is responsible for some emissions of carbon dioxide — the main greenhouse gas causing global warming. Efforts are being made in the construction industry to address these by utilising supplementary materials and developing alternative binders in concrete; the application of geopolymer technology is one such alternative. Indeed, geo
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8

Alanazi, Hani Mohammed. "Explore Accelerated PCC Pavement Repairs Using Metakaolin-Based Geopolymer Concrete." Thesis, North Dakota State University, 2015. https://hdl.handle.net/10365/27633.

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In order to adopt geopolymer concrete as a pavement repair material due to its better durability, splitting and slant shear tests are performed. Effect of curing time, degradation of the pavement concrete under different acid conditions on the bond strength of geopolymer with conventional concrete, and comparison of the metakaolin geopolymer with other pavement repair materials are analyzed. It was found curing time affects the interface bond strength greatly and the interface bond strength degrades quickly in an acid environment. Effect of molar ratio of SiO2/Na2O, calcium aluminate cement, a
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9

Paija, Navin. "FEASIBILITY STUDY OF USING GROUND BOTTOM ASH IN GEOPOLYMER CONCRETE." OpenSIUC, 2017. https://opensiuc.lib.siu.edu/theses/2134.

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AN ABSTRACT OF THE THESIS OF NAVIN PAIJA, for the Master of Science degree in CIVIL ENGINEERING, presented on 04/06/2017, at Southern Illinois University Carbondale. FEASIBILITY STUDY OF USING GROUND BOTTOM ASH IN GEOPOLYMER CONCRETE MAJOR PROFESSOR: Dr. Sanjeev Kumar Dr. Manoj K. Mohanty United States alone has about three quarters of the accessible worldwide reserve of coal. There are about 511 coal-powered electric plants and generates about 33% of the nation’s electricity. The combustion of coal results in a large number of solid waste materials known as coal combustion
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10

Rahman, Muhammad Motiur. "Geopolymer concrete columns subjected to axial load and biaxial bending." Thesis, Curtin University, 2013. http://hdl.handle.net/20.500.11937/1410.

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This thesis focuses on the behaviour of fly ash based geopolymer concrete columns under axial load and biaxial bending. Tests showed that failure load of columns increased with the increase of concrete compressive strength and longitudinal reinforcement ratio, and decreased with the increase of load eccentricity. Use of the Bresler’s reciprocal load formula with an iterative procedure for slender columns in uniaxial bending conservatively predicted the strength of the test columns.
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11

Deb, Partha Sarathi. "Properties of Geopolymer Concrete Using Ultrafine Fly Ash and Nanosilica." Thesis, Curtin University, 2018. http://hdl.handle.net/20.500.11937/75529.

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This study investigated the effects of ultrafine fly ash and nanosilica in geopolymers cured at room temperature. It was found that the optimum percentages of ultrafine fly ash and nanosilica with fly ash alone or that blended with 15% GGBFS or 10% OPC significantly improved strength and durability of geopolymers. The properties of geopolymer improved by enhancement of the hydrated phases and microstructure that reduced porosity.
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12

Karmokar, Trijon R. "Tensile performance of cast-in headed anchors in geopolymer concrete." Thesis, Edith Cowan University, Research Online, Perth, Western Australia, 2023. https://ro.ecu.edu.au/theses/2657.

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Geopolymer concrete is an ecofriendly alternative to normal concrete and its use in construction industry is growing due to the increased awareness of global warming. The relationships between the mechanical properties, such as the compressive strength, elastic modulus and mode I fracture energy of geopolymer concrete are not similar to those of normal concrete; these are specifically important for the prediction of the tensile capacity of structural anchors in a concrete substrate. As there are limited studies on the fracture energy of ambient-temperature cured geopolymer concrete, experiment
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13

Chang, Ee Hui. "Shear and bond behaviour of reinforced fly ash-based geopolymer concrete beams." Curtin University of Technology, Department of Civil Engineering, 2009. http://espace.library.curtin.edu.au:80/R/?func=dbin-jump-full&object_id=120482.

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Concrete is by far the most widely used construction material worldwide in terms of volume, and so has a huge impact on the environment, with consequences for sustainable development. Portland cement is one of the most energy-intensive materials of construction, and is responsible for some emissions of carbon dioxide — the main greenhouse gas causing global warming. Efforts are being made in the construction industry to address these by utilising supplementary materials and developing alternative binders in concrete; the application of geopolymer technology is one such alternative. Indeed, geo
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14

Suwan, Teewara. "Development of self-cured geopolymer cement." Thesis, Brunel University, 2016. http://bura.brunel.ac.uk/handle/2438/12975.

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To support the concept of environmentally friendly materials and sustainable development, the low-carbon cementitious materials have been extensively studied to reduce amount of CO2 emission to the atmosphere. One of the efforts is to promote alternative cementitious binders by utilizing abundant alumina-silicate wastes from the industrial sectors (e.g. fly ash or furnace slag), among which “Geopolymer (GP) cement” has received most attention as it can perform a wide variety of behaviours, in addition to cost reduction and less environmental impacts. The most common geopolymer production, fly
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15

Shadnia, Rasoul, and Rasoul Shadnia. "Green Geopolymer with Incorporated PCM for Energy Saving in Buildings." Diss., The University of Arizona, 2016. http://hdl.handle.net/10150/622931.

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This research studies the green geopolymer incorporated with phase change material (PCM) for energy saving in buildings. First class F fly ash (FA) based-geopolymer binder was studied. In order to improve the mechanical properties, low calcium slag (SG) was added to the FA to produce geopolymer. The effect of different factors including SG content (at different relative amounts FA/SG = 0/100, 25/75, 50/50, 75/25 and 100/0), NaOH solution at different concentrations (7.5, 10 and 15 M), various curing times (1, 2, 4, 7, 14 and 28 days) and curing temperatures (25 (ambient), 45, 60, 75 and 90°C)
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16

Soltaninaveh, Kaveh. "The properties of geopolymer concrete incorporating red sand as fine aggregate." Thesis, Curtin University, 2008. http://hdl.handle.net/20.500.11937/2481.

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Concrete is the most common building material in the world and its use has been increasing during the last century as the need for construction projects has escalated. Traditionally, concrete uses Ordinary Portland Cement (OPC) as binder, water as the activator of cement and aggregate. Finding an appropriate replacement for traditional concrete is a desirable solution to obviate the environmental problems caused by cement production. The use of fly ash as a partial replacement for Portland cement is a method to maintain the properties of concrete and reduce the need for cement. Fly ash is a by
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17

Ryno, Barnard. "Mechanical properties of fly ash/slag based geopolymer concrete with the addition of macro fibres." Thesis, Stellenbosch : Stellenbosch University, 2014. http://hdl.handle.net/10019.1/95866.

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Thesis (MEng) -- Stellenbosch University, 2014.<br>ENGLISH ABSTRACT: Geopolymer concrete is an alternative construction material that has comparable mechanical properties to that of ordinary Portland cement concrete, consisting of an aluminosilicate and an alkali solution. Fly ash based geopolymer concrete hardens through a process called geopolymerisation. This hardening process requires heat activation of temperatures above ambient. Thus, fly ash based geopolymer concrete will be an inadequate construction material for in-situ casting, as heat curing will be uneconomical. The study inv
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18

Soltaninaveh, Kaveh. "The properties of geopolymer concrete incorporating red sand as fine aggregate." Curtin University of Technology, Curtin Engineering Faculty, Department of Civil Engineering, 2008. http://espace.library.curtin.edu.au:80/R/?func=dbin-jump-full&object_id=115093.

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Concrete is the most common building material in the world and its use has been increasing during the last century as the need for construction projects has escalated. Traditionally, concrete uses Ordinary Portland Cement (OPC) as binder, water as the activator of cement and aggregate. Finding an appropriate replacement for traditional concrete is a desirable solution to obviate the environmental problems caused by cement production. The use of fly ash as a partial replacement for Portland cement is a method to maintain the properties of concrete and reduce the need for cement. Fly ash is a by
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19

Slabbert, Michael Charles. "Utilising waste products from Kwinana industries to manufacture low specification geopolymer concrete." Thesis, Curtin University, 2008. http://hdl.handle.net/20.500.11937/606.

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One technology that makes concrete without cement and does not have the associated carbon footprint is geopolymer concrete. This technology utilizes waste fly ash from power stations and mixes it with activating chemicals to form a binder with similar or better properties than cement. Not only does this technology directly reduce carbon emissions by replacing cement it also utilizes the waste bi-product from power stations and prevents it from going to landfill. Concrete is composed of coarse aggregates, sand and cementitious paste. It seemed possible to make geopolymer concrete from 100% wast
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20

Król, Maciej R. "Studies of concrete properties based on geopolymer binders : PhD thesis summary." Rozprawa doktorska, [s.n.], 2017. http://dlibra.tu.koszalin.pl/Content/1039.

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21

Nath, Pradip. "Study of fly ash based geopolymer concrete cured in ambient condition." Thesis, Curtin University, 2014. http://hdl.handle.net/20.500.11937/190.

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This research studied the properties of concrete using fly ash geopolymer as a low-emission alternative of Portland cement. Inclusion of small quantity of additives enabled curing in normal ambience eliminating the need for elevated heat. Mixtures suitable for curing in ambient condition were found that provided the setting time, workability and strength comparable to those of traditional cement concrete. Blending of additives with fly ash resulted in enhanced engineering and durability properties of geopolymer concrete.
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22

Olivia, Monita. "Durability related properties of low calcium fly ash based geopolymer concrete." Thesis, Curtin University, 2011. http://hdl.handle.net/20.500.11937/506.

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Geopolymer material using by-products can lead to a significant reduction of the carbon footprint and have positive impact on the environment. Geopolymer is recognized as an alternative construction material for the Ordinary Portland Cement (OPC) concrete. The mechanical properties of geopolymer concrete are superior for normal exposure environments. In terms of durability in the seawater, a limited number of publications were available. The seawater environment contains chloride ions and microorganisms that are harmful for reinforced concrete structures. Hence, a study of the durability of fl
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23

Cheema, Didar Singh. "Low calcium fly ash based geopolymer concrete: Long term durability properties." Thesis, Curtin University, 2014. http://hdl.handle.net/20.500.11937/2146.

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Alkaline activated low-calcium fly ash geopolymer (LCFG) was investigated for durability compared to conventional concrete. The investigation involved simulated laboratory testing mimicking the severe field environments and in-situ field observations of commercially produced culverts. Laboratory test data: pore structure, porosity, chloride diffusion, scaling, strength and electrochemical testing supported and explained the observed field data. Research investigated the impact of slag and reinforcing pre-treatment. Geopolymer binder being non-cement one using by-products, can be significantly
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Slabbert, Michael Charles. "Utilising waste products from Kwinana industries to manufacture low specification geopolymer concrete." Curtin University of Technology, Department of Civil Engineering, 2008. http://espace.library.curtin.edu.au:80/R/?func=dbin-jump-full&object_id=117996.

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One technology that makes concrete without cement and does not have the associated carbon footprint is geopolymer concrete. This technology utilizes waste fly ash from power stations and mixes it with activating chemicals to form a binder with similar or better properties than cement. Not only does this technology directly reduce carbon emissions by replacing cement it also utilizes the waste bi-product from power stations and prevents it from going to landfill. Concrete is composed of coarse aggregates, sand and cementitious paste. It seemed possible to make geopolymer concrete from 100% wast
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25

Williams, Franklin. "The formation of geopolymer concrete from bauxite-refining residue and fly ash: Application in sustainable concrete production." Thesis, Williams, Franklin (2021) The formation of geopolymer concrete from bauxite-refining residue and fly ash: Application in sustainable concrete production. Honours thesis, Murdoch University, 2021. https://researchrepository.murdoch.edu.au/id/eprint/63765/.

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Bauxite-refining residue is generated in the processing of bauxite into alumina using the Bayer process, and fly ash is a by-product of burning pulverized coal in an electricity generating. Bauxite-refining residue (red mud) and its’ concentrated sodium aluminate solution (Spent Liquor) are known to have properties of high alkalinity and fly ash consisting of fine powder are easily dispersed into the surrounding environment, such as aquatic, air and soil which may lead to ecological problems. This research synergistically incorporates red mud, fly ash, and the Spent Liquor from the Bayer proce
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Bondar, Dali. "Alkali activation of Iranian natural pozzolans for producing geopolymer cement and concrete." Thesis, University of Sheffield, 2009. http://etheses.whiterose.ac.uk/14553/.

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The challenge for the civil engineering community in the near future will be to realize the building of structures in harmony with the concept of sustainable development, through the use of high performance materials which have low environmental impact and can be produced at reasonable cost. Geopolymers are novel binder materials that could provide a route towards this objective. Although research on geopolymer has advanced, most of the previous research conducted on geopolymers has dealt with pastes and concentrated on the material's chemistry and microstructure. There is little information a
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27

Gildenhuys, Hendrik. "Pioneering a new approach to sustainable concrete in Western Australia: Geopolymer concrete from fly-ash with recycled aggregates." Thesis, Gildenhuys, Hendrik (2020) Pioneering a new approach to sustainable concrete in Western Australia: Geopolymer concrete from fly-ash with recycled aggregates. Honours thesis, Murdoch University, 2020. https://researchrepository.murdoch.edu.au/id/eprint/59791/.

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This study investigates the suitability of a closed-loop approach to the management of useful waste derived materials such as recycled aggregates from construction waste and fly-ash to manufacture recycled aggregate geopolymer concrete. This investigation was carried out in two parts. Part 1 considered the particle size distribution, water absorption and particle densities for both recycled coarse and fine aggregates. These materials were used to create recycled aggregate concrete specimens used for part 2 – compressive strength and slump test for both conventional Portland cement concrete
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28

Abu, Bakar Asif. "Effects of Nano Silica and Basalt Fibers on Fly Ash Based Geopolymer Concrete." Thesis, North Dakota State University, 2018. https://hdl.handle.net/10365/31729.

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Emission of carbon dioxide gas has been a source of major concern for the construction industry. To curb this emission, geopolymer concrete has been deemed as a potential alternative in the recent studies. Previous research also indicates that silica and fibers provide strength benefits to ordinary Portland cement concrete OPC. This study was undertaken to recognize the benefits of adding silica and basalt fibers in Class F fly ash based geopolymer concrete and comparing it with OPC concrete. One OPC and four Geopolymer mixtures were prepared. The results show a tremendous potential of using g
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29

Dlamini, Mandla. "Performance of geopolymer concrete subjected to mineral acid corrosion and related to microbially-induced corrosion (MIC) of concrete in sewers." Master's thesis, Faculty of Engineering and the Built Environment, 2021. http://hdl.handle.net/11427/33644.

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worse than degradation at the crown of the sewer pipe. Furthermore, results from this study show that high resistance under the static acid corrosion exposure condition cannot be extended to mean high resistance under the erosion-corrosion exposure condition for some concrete mixes. In this study, the static HCl test and the dynamic HCl test were used to measure the resistance of concrete mixes under the static corrosion exposure condition and erosion-corrosion exposure condition respectively. However, concretes that exhibited high resistance to the erosion-corrosion exposure condition were co
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30

Paudel, Shree Raj. "Pore Structure and Pore Solution in Alkali Activated Fly Ash Geopolymer Concrete and Its Effect on ASR of Aggregates with Wide Silicate Contents." Thesis, North Dakota State University, 2019. https://hdl.handle.net/10365/31687.

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Alkali silica reaction (ASR) is detrimental to concrete. It is a time-dependent phenomenon, which can lead to strength loss, cracking, volume expansion, and premature failure of concrete structures. In essence, it is a particular chemical reaction involving alkali hydroxides and reactive form of silica present within the concrete mix. Geopolymer is a type of alkaline activated binder synthesized through polycondensation reaction of geopolymeric precursor and alkali polysilicates. In this thesis, three types of reactive aggregates with different chemical compositions were used. Systematic labor
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31

Hosan, Md Anwar. "Residual mechanical properties of steel fibre reinforced geopolymer concrete (SFRGC) after exposure to elevated temperatures." Thesis, Curtin University, 2016. http://hdl.handle.net/20.500.11937/1341.

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This study presents the effects of two types of alkali activators (Na and K-based) on the residual mechanical properties of steel fibre reinforced geopolymer concretes (SFRGC) after exposed to various elevated temperatures and compared with those of steel fibre reinforced concrete (SFRC). Results show that the SFRGC containing Na- based activators exhibited much higher residual compressive and indirect tensile strength at all elevated temperatures including at ambient condition than its K-based counterpart and SFRC.
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32

Bosch, Giner Juan. "Chloride and Carbonation Induced Corrosion of Steel in Fly Ash Geopolymer Pore Solution." University of Akron / OhioLINK, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=akron1627755030968028.

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33

Ren, Xin. "Complete Recycling and Utilization of Waste Concrete Through Geopolymerization." Diss., The University of Arizona, 2015. http://hdl.handle.net/10150/577187.

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This research investigates complete recycling and utilization of waste concrete to produce new structural concrete through geopolymerization. The investigation was conducted through both macro-and micro/nano-scale studies. First the geopolymer paste synthesized using a mixture of waste concrete fines (WCF) and class F fly ash (FA) as the source material and a mixture of NaOH solution (N) and Na2SiO3 solution (SS) as the alkaline activating agent was studied. Various NaOH concentrations, SS/N ratios, and WCF contents were used to produce geopolymer paste specimens in order to study their effect
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Tran, Thanh Tung. "Structural Analysis and Design of Fibre-reinforced Ambient-cured Geopolymer Concrete Beams under Static and Dynamic Loading." Thesis, Curtin University, 2020. http://hdl.handle.net/20.500.11937/84212.

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This study through intensive static and impact tests demonstrated the possibility of replacing conventional Portland cement concrete beams with steel reinforcements by greener ambient-cured geopolymer concrete (GPC) beams reinforced with corrosion-resistant basalt fibre reinforced polymer (BFRP) bars. Analytical formulae were also derived by taking into consideration the unique material properties of GPC and BFRP, and verified against testing results for design analysis of this new type of sustainable and durable structures in construction.
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Al-Majidi, Mohammed Kadhim Haloob. "Development of Fibre Reinforced Geopolymer Concrete (FRGC) cured under ambient temperature for strengthening and repair of existing structures." Thesis, University of Brighton, 2017. https://research.brighton.ac.uk/en/studentTheses/13f703df-e33a-42d7-ad73-8511390fd582.

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Most of the previous research on plain and fibre reinforced geopolymer concrete (FRGC) has concerned on the properties of geopolymer mixtures hardened under heat curing conditions, which is a severe limitation for on-site, cast-in-place applications. This study focuses on the material and structural properties of novel fibre reinforced geopolymer concretes cured under ambient temperature. The overall aim of the study was to develop and test a more environmentally sustainable concrete material with improved structural characteristics, which utilises waste rather than primary mineral products, s
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Kothari, Ankit. "Effects of Fly Ash on the properties of Alkali Activated Slag Concrete." Thesis, Luleå tekniska universitet, Geoteknologi, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-63534.

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This master thesis presents the effects of fly ash on the properties of alkali activated slag concrete, commonly referred as Geopolymer concrete (GPC). Cement manufacturer are major producers of CO2 which negatively affects the environment. Due to the increased construction activities and environmental concern, it is necessary to introduce alternative and eco-friendly binders for concrete. Slag and fly ash based concrete, which is by-product from industrial waste, is probably the best replacement for OPC concrete due to less or nil environmental issue. Most of the researchers have already conc
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Ahmari, Saeed. "Recycling and Reuse of Wastes as Construction Material through Geopolymerization." Diss., The University of Arizona, 2012. http://hdl.handle.net/10150/223338.

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Storage of mine tailings and waste concrete imposes economical and environmental impacts. Researchers have attempted to reuse wastes as construction material by utilizing ordinary Portland cement (OPC) to stabilize them. This method, however, has a number of limitations related to OPC. In this research, a recent technology called geopolymerization is used to stabilize mine tailings and concrete waste so that they can be completely recycled and reused. The research includes three main parts. The first part studies the effect of different factors on the mechanical properties, micro/nano structur
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Shearer, Christopher R. "The productive reuse of coal, biomass and co-fired fly ash." Diss., Georgia Institute of Technology, 2014. http://hdl.handle.net/1853/52298.

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Stricter greenhouse gas emission limits and renewable energy requirements are expected to further increase the worldwide practices of firing biomass and co-firing biomass with coal, which are both considered more sustainable energy sources than coal-only combustion. Reuse options for the by-products of these processes -biomass ash and co-fired fly ash -remain limited. Therefore, this research examines their use as supplementary cementitious materials (SCMs) in concrete and as precursors for alkali-activated geopolymers. Toward their potential use as an SCM, after characterizing these ashes as
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Kuranchie, Francis Atta. "Characterisation and applications of iron ore tailings in building and construction projects." Thesis, Edith Cowan University, Research Online, Perth, Western Australia, 2015. https://ro.ecu.edu.au/theses/1623.

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The mine tailings are generated as the wastes worldwide as a result of exploration, excavation, blasting, beneficiation and extraction of mineral ores. In Western Australia, due to the extensive mining activities and increasing low grade ores, there is generation of mine tailings in large quantities, which could lead to environmental and disposal problems. The common practice of handling the tailings are to store them in tailing dams or as stockpiles near mine sites. Limited quantities are sometimes used as backfills and other applications. The utilisation of tailings in building and construct
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40

Fialová, Barbora. "Rehydratace alkalicky aktivované strusky po vysokoteplotním namáhání." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2016. http://www.nusl.cz/ntk/nusl-239940.

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Ground granulated blast furnace slag is a by-product of the steel industry and is often used in combination with ordinary Portland cement as a binder in concrete. When concrete is exposed to high temperatures, physical and chemical transformations lead to significant loss of mechanical properties. This study aims to investigate the effect of high temperatures and rehydration on the mechanical properties, microstructure and phase composition of alkali activated slag. The results of the research could make an important contribution to decisions made concerning the reconstruction of structures af
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Lee, William K. "Solid-gel interactions in geopolymers." Connect to thesis, 2002. http://repository.unimelb.edu.au/10187/1071.

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This is partly because the requirements for such an ultimate material change with people’s perception about its properties as well as its environmental impact. Thus, the once-believed ultimate Portland cement binder is now becoming unacceptable for a number of reasons including poor durability as well as severe environmental impact during production. Thus, an improved mineral binder is required by modern society to serve the same purposes as the existing Portland cement binder, as well as to reduce the current environmental impact caused by Portland cement production.<br>Geopolymerisation is s
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Hasnaoui, Abdelaziz. "Optimisation d'un géopolymère à base de laitier et de metakaolin pour la rélisation d'un béton de structure." Thesis, Cergy-Pontoise, 2019. http://www.theses.fr/2019CERG1019.

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Ce travail concerne le comportement des bétons géopolymères formulés à base de laitier et de métakaolin en utilisant une solution de silicate de sodium comme activateur. La première partie de l’étude s’attache à l’optimisation de la formulation du ciment géopolymère. Pour atteindre cet objectif, un mortier Portland de référence et vingt-quatre mortiers géopolymères ont été développés en faisant varier le rapport massique Laitier/Métakaolin (25/75, 50/50, 75/25) et le rapport molaire SiO2/Na2O, noté RM, des solutions alcalines (RM compris entre 1,0 et 2,0). Les mortiers ont été caractérisés à l
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Zheng, Yong Chu. "Shrinkage behaviour of geopolymers /." Connect to thesis, 2010. http://repository.unimelb.edu.au/10187/7157.

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Wasserbauer, Jaromír. "Mechanické vlastnosti mikrostrukturních komponent anorganických materiálů." Doctoral thesis, Vysoké učení technické v Brně. Fakulta chemická, 2013. http://www.nusl.cz/ntk/nusl-233368.

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Disertační práce se zabývá studiem strukturních a mechanických vlastností anorganických materiálů. Cílem je nalezení jednotlivých fází ve zkoumaném materiálu a hlavně lokalizace (mechanicky) nejslabšího místa, jeho ovlivnění a následně výroba materiálu o lepších mechanických vlastnostech. Z důvodu velkého množství použitých metod je základní teorie vložena vždy na začátku příslušné kapitoly. Taktéž z důvodu značného množství výsledků jsou na konci kapitol uvedeny dílčí závěry. Práce je rozdělena na tři části, kdy první se zabývá seznámením s možnostmi modelování mikro-mechanických vlastností a
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Mohelská, Lucie. "Modifikace betonových prvků pro chladicí věže." Master's thesis, Vysoké učení technické v Brně. Fakulta chemická, 2013. http://www.nusl.cz/ntk/nusl-216998.

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This master´s thesis deals with the suppression of the growing of algae in cooling towers. Subject of the work is suggestion and testing surface modification of the existing mature concrete in order to suppress the growth of algae. In the frame surface modification, several commercially available and newly developed systems were tested. Testing systems are based on the basis of portland cement, geopolymers or formation of insoluble complex compounds containing metal elements (Zn, Cu). Experimental methods were applied in the real environment of cooling towers of Dukovany Nuclear power plant.
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Muntingh, Yolandi. "Durability and diffusive behaviour evaluation of geopolymeric material." Thesis, Stellenbosch : University of Stellenbosch, 2006. http://hdl.handle.net/10019.1/2882.

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Thesis (MScEng (Process Engineering))--University of Stellenbosch, 2006.<br>The study presented in this thesis symbolises one of the first ever efforts to better understand and describe the durability of geopolymers used in large scale commercial applications. In terms of the construction industry, geopolymers can be seen as a value-added approach to substitute the Ordinary Portland Cement (OPC) monopoly. It is particularly the fly ash-based geopolymers that are the main attraction, due to their economic and environmental advantages, over and above the large quantities of this material that ar
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Guimarães, Paulo Victor Campos. "Estudo da aderência de concretos ativados alcalinamente à base de cinza da casca de arroz e metacaulim /." Ilha Solteira, 2019. http://hdl.handle.net/11449/182264.

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Orientador: José Luiz Pinheiro Melges<br>Resumo: A indústria do cimento Portland é responsável direta por uma carga de poluentes de significativo dano ambiental. Os Concretos Ativados Alcalinamente (CAA) são matrizes compostas por um ativador alcalino e um aglomerante alternativo. O material comumente utilizado para a ativação alcalina é o silicato de sódio, cuja fabricação também se mostra como ambientalmente nociva. O silicato de sódio, junto ao cimento Portland, podem ser dispensados, uma vez que a produção do ativador pode se dar através de um composto rico em silício (materiais pozolânico
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Citeroni, Chiara. "Alkali-activated expanded lightweight aggregates for the production of special asphalt concretes." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2018.

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La presente tesi sperimentale si focalizza sulla produzione e successiva analisi, tramite test prescritti dalla normativa europea, di conglomerati bituminosi costituiti da aggregati leggeri che vadano a sostituire il 12% degli aggregati naturali, presenti in un tipico strato d’usura. Questi aggregati leggeri sono stati originati partendo da due differenti polveri di scarto ad attivazione alcalina, quali polvere di basalto e bentonite esausta impiegati come principali precursori. Infatti, l’utilizzo di materiali di riciclo come prodotti sostenibili desta molto interesse nell’ambito ingegneris
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Chiu, Wei-Ting, and 邱緯婷. "Development of FA/GGBFS Geopolymer Concrete." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/5e48n3.

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碩士<br>國立臺北科技大學<br>土木工程系土木與防災碩士班<br>106<br>Iron blast-furnace slag is a by-product produced by the steel plant during the iron making process, and fly ash is a major by-product of coal-fired power plants. Every year, a large amount of blast-furnace slag and fly ash produced. With great difficulty, if it is disposed of as waste, it will not only be environmentally unfriendly, but will also cost a lot of costs. If blast-furnace slag is water-quenched cooling, grinding into fine powder and adding to concrete can replace part of the cement, it is generally considered that the concrete can be made d
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Chen, Jing-Len, and 陳敬仁. "Preparation of Geopolymer Green Concrete and Pervious concrete by using Marble." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/y8322w.

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碩士<br>國立臺北科技大學<br>資源工程研究所<br>106<br>In this study, by using the cement raw material –marble and slag as the main material, mix with the alkali solution to make the marble based geopolymer green cement, concrete and pervious concrete. This research can be divided into three parts, the first part uses the marble based geopolymer to make the geopolymer green cement paste, which the result shows the setting time of green cement paste can control more than 80 mins, and the compressive strength can reach more than 70MPa after 28 days curing time. By Comparing with traditional Portland cement, green
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