Sodium Sulphate Effect on Cement Produced with Building Stone Waste

E. Sancak, Ş. Özkan
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引用次数: 20

Abstract

In this study, the blended cements produced by using the building stone waste were exposed to sulphate solution and the cement properties were examined. Prepared mortar specimens were cured under water for 28 days and then they were exposed to three different proportions of sodium sulphate solution for 125 days. Performances of cements were determined by means of compressive strength and tensile strength tests. The broken parts of some mortar bars were examined with scanning electron microscope (SEM). Besides, they were left under moist atmosphere and their length change was measured and continuously monitored for period of 125 days. In blended cements, solely cements obtained by replacing 10–20% of diatomites gave similar strength values with ordinary Portland cement (CEM I 42.5R) at the ages of 7, 28, and 56 days. In all mortar specimens that included either waste andesite (AP) or marble powder (MP) showed best performance against very severe effective sodium sulphate solutions (13500 mg/L).
硫酸钠对建筑石材废料生产水泥的影响
在本研究中,利用建筑石料废料制备水泥,并将其暴露于硫酸盐溶液中,对水泥性能进行了研究。制备好的砂浆试件在水下固化28天,然后在三种不同比例的硫酸钠溶液中暴露125天。水泥的性能通过抗压强度和抗拉强度试验来确定。用扫描电镜对砂浆杆的断裂部位进行了观察。将其放置在潮湿的空气中,测量其长度变化,连续监测125 d。在混合水泥中,单独替换10-20%硅藻土获得的水泥在7、28和56天龄时的强度值与普通波特兰水泥(CEM I 42.5R)相似。在所有砂浆样品中,包括废安山岩(AP)或大理石粉(MP),在非常严重的有效硫酸钠溶液(13500 mg/L)中表现出最佳性能。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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