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Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 38 for “"Geopolymers"”.
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Nucleation seeding in metakaolin geopolymers
Geopolymers are a class of amorphous, aluminosilicate-based binders proposed as an alternative to the cement binders used commonly in the construction industry. One of the main advantages of using geopolymer concrete is the fact that waste materials like fly ash are used as precursors for its …
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Evaluating shrinkage of fly ash - slag geopolymers
… help in evaluating the mechanical behavior of geopolymers when used in field. Since shrinkage causes volume change, any volume change after the binder has stiffened will cause stresses to develop and this will cause cracks and reduction in the load carrying capacity of the mix. The study was …
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Synthesis and characterization of geopolymers for infrastructural applications
… as well as mechanical properties of geopolymers generated by 3 different kinds of raw materials (i.e., metakaolin, mixture of red mud and fly ash, mixture of red mud and rice husk ash) was explored. For geopolymers from identical raw materials, variable parameters involved in the …
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An Experimental and Numerical Study on Metakaolin-based Geopolymers
… concrete without compromising its performance. Geopolymers (GPs) are a class of these alternative binders attracting significant attention in the past few decades. They are produced by mixing an aluminosiliceous powder such as metakaolin (MK) with an alkaline solution. Several parameters such as …
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Structural Evolution and Ceramic Formation in Metakaolin-Based Geopolymers
Geopolymers are increasingly being considered in a variety of refractory applications and as precursors to ceramic formation. However, fundamental details regarding their structure, thermal stability, and crystallization on heating are not well understood. In this dissertation, the structural …
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Use of organic bases in the synthesis of geopolymers
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2024-09-16 without embargo terms
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Use of organic bases in the synthesis of geopolymers
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2024-09-16 without embargo terms
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An Investigation of Geopolymers for Use In High Temperature Applications
This research explores the use of various geopolymer concretes at high temperatures. Geopolymer cement concretes (GCCs) do not require hydration to maintain a stable structure. This is beneficial in high temperature conditions, such as a core meltdown at a nuclear power plant or a structural fire, …
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Alkali-activated materials and Geopolymers from wastes and secondary raw materials: innovative and sustainable building products
L'abstract è presente nell'allegato / the abstract is in the attachment
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Material Design and Durability Characterization of “Non-Brittle” Geopolymer
Geopolymers are inorganic polymers that have resulted in wide scientific interest and broad development of applications. They possess intriguing characteristics that bridge polymer science and ceramics. Many inexpensive earth-abundant minerals and industrial wastes can form geopolymers; this …
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Understanding effects of silicon/aluminum ratio and calcium hydroxide on chemical composition, nanostructure and compressive strength for metakaolin geopolymers
… composition and nanostructure for metakaolin geopolymers. The second was to determine how the composition and nanostructure correlate with mechanical properties of the geopolymer. For this study, the geopolymers were made using metakaolin, calcium hydroxide, sodium hydroxide, sodium silicate …
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Development and qualification of a novel process for the treatment and conditioning of spent ion exchange resins into geopolymers
L'abstract è presente nell'allegato / the abstract is in the attachment
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Microstructure, Quasi-Static, And High-Strain Rate Dynamic Characterization Of Metakaolin And Fly Ash Based Geopolymers For Structural Applications
Geopolymers are a class of rapid setting cementing systems that have been used as mortar or additives in concrete mixes to improve properties. Several types of geopolymer systems such as metakaolin and fly ash based geopolymers are widely used, and are available in different mixture proportions [1, …
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Setting and nanostructural evolution of metakaolin geopolymer
Geopolymers are being promoted as a sustainable alternative to the ordinary cements mainly because their production is associated with much less CO2 emissions. They also show advantages including compressive strength comparable to portland cements, high temperature resistance, and stability under …
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Variations in rheological properties and fundamental processing of potassium-based geopolymers for optimal 3D printed layer adhesion for applications in extreme environment
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2025-10-19 without embargo terms
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Geopolymer composites and their applications in stress wave mitigation
… mechanical, thermal and electrical properties of geopolymers have been of interest for the past two decades. The processes and microstructures of potassium-based geopolymer (K2O ∙ Al2O3 ∙ 4SiO2 ∙ 11H2O) have been studied by many researchers with various techniques. However, the brittleness and …
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Understanding the role of slag on geopolymer hardening and microstructural development
… The study was performed on user-friendly geopolymers obtained by using Class F flyash/slag/K-silicate/H2O. This involves the use of low concentration alkaline activators and low-temperature curing. A detailed investigation of microstructural development and hardening rate was presented for …
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Geopolymer-derived ceramics and composites
… and characterized materials derived from geopolymers for use in extreme environments. In the first section, a method of engineering tectosilicate material systems with tailorable thermal expansion was developed with the goal of designing new candidate materials for environmental barrier …
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Novel, inorganic composites using porous, alkali-activated, aluminosilicate binders
Geopolymers are an inorganic polymeric material composed of alumina, silica, and alkali metal oxides. Geopolymers are chemical and fire resistant, can be used as refractory adhesives, and are processed at or near ambient temperature. These properties make geopolymer an attractive choice as a matrix …
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