Global ETD Search
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 10 of 10 for “"Calcined clay"”.
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Durability of alkali-activated calcined clay - GGBFS concrete against carbonation and chloride diffusion
… derived from by-products or industrial residues. Calcined clay has emerged as a potential candidate as a precursor for this type of material. Large amounts of suitable clays are available in Australia and around the world. However, there is not enough data allowing to assess their durability, …
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Admixture compatibility and freeze-thaw resistance of concrete prepared using commercially produced limestone calcined clay cements
… prepared using commercially produced limestone calcined clay cements (LC3s) were evaluated during this study. Incompatibility was evaluated for commercially available high range water reducers (HRWRs) and air entraining agents (AEAs) by studying the impact on flow diameters and initial setting …
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Development of low-clinker concrete: partial replacement of cement with calcined clay and limestone, based on selected African raw materials
… LC3 binders, which consist of ground limestone, calcined kaolinite clay, and cement. In this study, the suitability of kaolinite clays for use in LC3 binders from selected deposits in South Africa and Tanzania was assessed. Four samples of clays were selected for the experimental work. The …
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Degradation of polylactic acid in the presence of microsize and nanosize fillers
… MMT) and anionic (hydrotalcite, HT) clay micro- or nanocomposites based on semicrystalline and amorphous polymers and unmodified and organomodified as well as calcined or non-calcined clays at 5wt% concentration are produced by melt mixing. Depending on the clay type, presence of …
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Advancements in concrete material sustainability : supplementary cementitious material development and pollutant interaction
Calcined clay and fly ash supplementary cementitious materials (SCMs) used in cement based materials were examined for their chemical and mechanical performance, as well as their pollutant interaction. This dissertation addresses three primary research questions, namely: (i) can zincite additions …
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Additive manufacturing of non plastic porcelain material by direct writing and freeze casting.
… that it is not possible to use conventional clay based porcelain materials with a platelet shaped microstructure which inhibits freeze casting. In this thesis the development and characterisation of non plastic porcelain slurry, based on substitution of kaolin (clay) with a calcined clay …
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Practical Applications of Infrared, Raman and Nuclear Magnetic Resonance Spectroscopic Techniques for Qualitative, Quantitative and Structural Analysis of Pharmaceutical Drugs, Cementitious Material and Organic Molecules Containing Phosphorous
… of this dissertation explains the analysis of calcined clay as supplementary cementitious material, obtained from Ghana, a West African nation, which does not have an abundance of commonly used SCMs such as fly ash, silica fume, metakaolin, and slag. However, the abundance of clay minerals in …
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The development of a geopolymer binder from the interbasaltic laterites of Northern Ireland
… of geopolymers. <br/><br/>However, impure clays containing kaolinite may be able to be used as precursors provided associated minerals do not affect the geopolymerisation process. Such clays are found in parts of Northern Ireland and have never been considered as precursors for a geopolymer …
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A review on the efficiency of different supplementary cementitious materials as a partial replacement for Portland cement in concrete
… are industry by-products; metakaolin, limestone calcined clay, which are naturally occurring minerals; rice husk ash, which is an agricultural waste material; and limestone-fly ash, which is a combination of an industrial by-product and a naturally occurring material. Firstly, an overview of the …
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A MULTISCALE EXPERIMENTAL INVESTIGATION OF MICROSTRUCTURAL DEVELOPMENT, MASS TRANSPORT, AND CARBONATION PHENOMENA IN LOW CLINKER CEMENTITIOUS MATERIALS
Concrete is the most widely used construction material in the world. However, there is a need to develop sustainable concrete mixtures considering that cement production accounts for 5-8% of anthropogenic CO2 emissions. Low-clinker cementitious materials offer enormous CO2 reduction potential due …