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首页> 美国卫生研究院文献>Materials >Effect of High Calcium Fly Ash Ladle Furnace Slag and Limestone Filler on Packing Density Consistency and Strength of Cement Pastes
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Effect of High Calcium Fly Ash Ladle Furnace Slag and Limestone Filler on Packing Density Consistency and Strength of Cement Pastes

机译：高钙粉煤灰钢包炉渣和石灰石填料对水泥浆料填料密度稠度和强度的影响

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摘要

Environmental considerations and technical benefits have directed research towards reducing cement clinker content in concrete, and one of the best ways to do this is to replace cement with supplementary cementitious materials. High calcium fly ash, ladle furnace slag, and limestone filler were investigated as supplementary cementitious materials in cement pastes, and binary mixtures were produced at 10%, 20%, and 30% cement replacement rates for each material. The water requirement for maximum packing and for normal consistency were obtained for each paste, and strength development was determined at 3, 7, 28, and 90 days for the 20% replacement rate. Furthermore, two ternary mixtures at 30% cement replacement were also prepared for maximum packing density and tested for compressive strength development. The results showed that high calcium fly ash decreased cement paste packing and increased water demand but contributed to strength development through reactivity. Ladle furnace slag and limestone filler, on the other hand, were less reactive and seemed to contribute to strength development through the filler effect. The ternary paste with 70% cement, 20% high calcium fly ash, and 10% limestone filler showed equivalent strength development to that of the reference cement paste.
机译：环境考虑和技术效益对减少混凝土中的水泥熟料含量的研究，以及最好的方法之一是用补充水泥材料取代水泥。研究了高钙粉煤灰，钢包炉渣和石灰石填料作为水泥糊剂的补充水泥材料，并且二元混合物以每种材料的10％，20％和30％水泥置换率产生。为每种糊剂获得最大填料和正常稠度的水需求，并在3,7,28和90天测定强度显影，以进行20％的更换率。此外，还制备了30％水泥置换的两种三元混合物用于最大填充密度并测试压缩强度显影。结果表明，高钙粉煤灰降低了水泥膏填料和增加的水需求，但通过反应性提高了强度发展。另一方面，钢包炉炉渣和石灰石填料较少，似乎通过填充效果有助于强度发展。三元浆料具有70％水泥，20％高钙粉煤灰和10％石灰石填料显示出对参考水泥浆料的等效强度显影。

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