Study on quaternary concrete micro-structure, strength, durability considering the influence of multi-factors
Study on quaternary concrete micro-structure, strength, durability considering the influence of multi-factors
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DOI：
10.1016/j.conbuildmat.2017.02.068
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发表时间：
2017-05-15
影响因子：
7.4
通讯作者：
Kaushik, Surendra Kumar
中科院分区：
文献类型：
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作者：
Dave, Niragi;Misra, Anil Kumar;Kaushik, Surendra Kumar
试验研究了不同辅助胶凝材料对四元胶凝材料力学性能的影响。以粉煤灰（FA）、磨细矿渣（GGBS）、偏高岭土（MK）和硅灰（SF）按预定比例混合，取代30- 50重量%的普通波特兰水泥（OPC）。对于所有混合料，预先确定的M40等级四元混合料的水/粘合剂比和总胶凝材料分别保持恒定在0.40和440 kg/m3。进行了测试，以表征在7，28，56，90，180和365天的四元混合混凝土的机械性能，并获得的结果进行了比较与控制混凝土（100%OPC）以及二元混合物（70%OPC：30%FA和50%OPC：50%FA）获得的相应值。按照印度标准实践规范制备、固化和测试整个样本。此外，通过快速氯化物渗透性测试（RCPT）和硫酸盐侵蚀测试来确定四元混合物的耐久性。水泥与添加辅助胶凝材料的协同作用对耐久性具有积极的影响，并且在少数组合中，发现具有四元粘结剂的混凝土的混合强度优于受控和二元混合混凝土。根据试验结果，与100%控制混凝土相比，FA、SF和GGBS/MK的最佳混合物作为OPC的部分替代物作为四元粘结剂将是更好的选择。(C)2017爱思唯尔有限公司版权所有
Experimental study on the effect of mechanical behavior of quaternary binders, prepared using various supplementary cementitious materials was performed. Fly ash (FA), Ground Granulated Blast furnace Slag (GGBS), Metakaolin (MK) and Silica Fume (SF) were blended in pre-determines proportions by replacing 30-50% of Ordinary Portland Cement (OPC) by weight. The water/binder ratio and total cementitious materials for pre-decided M40 grade quaternary mix were kept constant for all mixes at 0.40 and 440 kg/m(3), respectively. Tests were carried out to characterize the mechanical behavior of quaternary blended concretes at 7, 28, 56, 90, 180 and 365 days and results obtained were compared with the corresponding values obtained for controlled concrete (100% OPC) as well as binary mixes (70% OPC:30% FA and 50% OPC: 50% FA). The entire specimen were prepared, cured and tested as per the Indian standard code of practice. In addition to that durability of the quaternary mix was determined via Rapid Chloride Permeability Test (RCPT) and sulfate attack test. The synergistic action of the cement with the addition of supplementary cementitious materials has a positive effect vis-a-vis the durability and in few combinations of mixes strength of the concrete with quaternary binders was found better than that of the controlled and binary mix concrete. Based on the test results, optimum mixes of FA, SF and GGBS/MK as partial replacement to the OPC as quaternary binder would be a better option compare to 100% controlled concrete. (C) 2017 Elsevier Ltd. All rights reserved.