酸雨作用下钢纤维煤矸石混凝土耐久性研究

发布时间：2018-05-28 11:31

本文选题：酸雨侵蚀 + 钢纤维煤矸石混凝土　；参考：《非金属矿》2016年06期

【摘要】：基于酸雨循环侵蚀试验,探究了在不同p H值酸雨溶液与钢纤维掺量条件下,钢纤维增强煤矸石混凝土质量、劈裂抗拉强度及碳化深度等耐久性指标的变化特性。结果表明:第1次酸雨循环时,p H值为2.0酸雨溶液中钢纤维煤矸石混凝土达到最大质量,其增加率为0.25%,随后骤降到最小质量,其质量损失率峰值2.37%;钢纤维煤矸石混凝土劈裂抗拉强度损失率与循环数呈近似线性关系,其最大损失率为21.91%;不同p H值酸溶液中钢纤维煤矸石混凝土碳化深度与酸雨循环数呈正相关,显著性表现为p H=2.0p H=3.0p H=4.0;1.0%钢纤维掺量是钢纤维煤矸石混凝土的最优掺量,可优化其空隙结构,有效抑制酸雨溶液的侵蚀。
[Abstract]:Based on acid rain cyclic erosion test, the variation characteristics of durability indexes such as quality, splitting tensile strength and carbonation depth of steel fiber reinforced coal gangue concrete under different pH value acid rain solution and steel fiber content were investigated. The results show that the maximum mass of steel fiber gangue concrete in acid rain solution is 2.0 in the first acid rain cycle, and the increase rate is 0.25%, and then decreases to the minimum mass. The peak value of mass loss rate is 2.37, and the loss rate of splitting tensile strength of steel fiber gangue concrete is approximately linear with the number of cycles. The maximum loss rate is 21.91%, the carbonation depth of steel fiber gangue concrete in different pH value acid solutions is positively correlated with the acid rain cycle number, and the significant difference is that the steel fiber content of 1.0% steel fiber is the optimal content of steel fiber coal gangue concrete. The pore structure can be optimized and the erosion of acid rain solution can be effectively inhibited.
【作者单位】：辽宁工程技术大学土木与交通学院;辽宁工程技术大学建筑工程学院;大连大学建筑工程学院;
【基金】：国家自然科学基金(51474045;51174038) 辽宁工程技术大学市场调研信息立项基金(SCDY2012010)
【分类号】：TU528.572

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