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Self-Consolidating Mortars Using Various Secondary Raw Materials

机译:使用各种辅助原料的自固结砂浆

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摘要

A study made on 15 series of self-consolidating mortars (SCMs) using different types of secondary raw materials (SRMs) at high replacement levels of cement is reported. SRM particle characterization and the flow behavior, strength development, microstructure, and early volume stability of SCMs are reported. A simple procedure has been suggested for strength quantification of SCMs using various SRMs. The study demonstrates that shape, size, and surface morphology and porosity of SRMs play a very significant role in determining the water and high-range water-reducing admixture (HRWRA) demands of SCMs. SRM characterization also helps to understand various test results routinely performed on SCM systems. Based on the comparative tests, it can be said that limestone powder (LSP) alone is not the best SRM for self-consolidating cementitious systems (SCCS). Suitable blends of fly ash (FA) and silica fume (SF) or LSP can be good SRMs for an improved overall response of SCMs using well-graded aggregates.
机译:据报道,对15种系列的自凝结砂浆(SCM)进行了研究,这些砂浆使用了不同类型的次生原料(SRM),且水泥的替代含量很高。报道了SRM颗粒的表征以及SCM的流动行为,强度发展,微观结构和早期体积稳定性。已经提出了使用各种SRM对SCM进行强度定量的简单方法。该研究表明,SRM的形状,大小,表面形态和孔隙率在确定SCM的水和高减水剂(HRWRA)需求方面起着非常重要的作用。 SRM表征还有助于了解在SCM系统上常规执行的各种测试结果。根据比较测试,可以说仅石灰石粉(LSP)并不是自固结胶结体系(SCCS)的最佳SRM。粉煤灰(FA)和硅粉(SF)或LSP的合适混合物可以是良好的SRM,可使用分级良好的骨料来改善SCM的整体响应。

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