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Showing 1 to 7 of 7 for “"Fly Ash Replacement"”.
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Verifying the Calcium Oxychloride Threshold in Cementitious Pastes
… over time in paste specimens exposed to CaCl2. Fly ash is used to replace cement (up to a 50% mass replacement) in order to limit CAOXY deterioration. While compressive strength reduction was observed in all specimens despite fly ash replacement level, the results generally validate the current …
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Performance of No Vibration/No Admixture Masonry Grout Containing High Replacement of Portland Cement with Fly Ash and Ground Granulated Blast Furnace Slag
… proportions of Portland cement with Type F fly ash and/or ground granulated blast furnace slag (GGBFS). The percentages of Portland cement replacement evaluated were 0%, 50%, 60%, and 70% for Type F fly ash. The percentages of Portland cement replacement evaluated were 0%, 60%, 70% and 80% …
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Surface and microstructural properties of photocatalytic cements for pavement applications
… curtailed by replacing some of the cement with fly ash or increasing TiO2 content by mass of cement. Spectrophotometer testing showed that reflectance of the mortar samples also factored into photocatalytic performance. More reflective specimens demonstrated greater NOx removal ability, which …
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The nanostructure and degradation of C-S-H in Portland and blended cements
… white Portland cement (WPC) and blends with 30% fly ash (PFA) have been characterised using a multi-technique approach, With particular emphasis on the nature of the C-S-H phase. The neat and fly ash blended pastes were activated with water or a 5M KOH solution and cured for one year at 25'C, one …
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EFFECTS OF DEICING SALTS ON THE DURABILITY OF CONCRETE INCORPORATING SUPPLEMENTARY CEMENTITIOUS MATERIALS
… materials (SCMs), slag cement or Class C fly ash, exposed to sodium chloride (NaCl), calcium chloride (CaCl2), or magnesium chloride (MgCl2) is evaluated based on damage due to wetting and drying and scaling, with the goal of determining appropriate replacement levels of portland cement …
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Use phase performances of photocatalytic cements
… respectively. Replacing both types of cement by fly ash decreased NOx removal in the non-carbonated state, but helped to reduce the adverse effect of carbonation. Based on XRD measurements, CSAB samples carbonated more than the OPC samples. CaCO3 content in white OPC and CSAB samples decreased …
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Abrasion resistance of IV-RCC used to construct spillway concrete steps of South African dams
… of concrete included conventional concrete, fly ash concrete and slag (GGBS) concrete. DWS uses fly ash in the majority of their mass concrete projects due to its pozzolanic properties which help slowing down the heat of hydration. The slag was included in these mixes in order to have …