硅酸盐通报2018，Vol.37Issue(6)：1979-1982,2007,5.
冻融循环对混凝土酸雨侵蚀损伤进程的影响
Acid Rain Attack Damage Progress of Concrete in Freezing-thawing Environment
摘要
Abstract
Based on measuring the damage deterioration curves of the relative surface elastic modulus and relative dynamic elastic modulus of concretes, the influence of freezing-thawing cycles on the damage progress of concretes to acid rain attack were investigated.The results show that freezing-thawing cycles shorten the performance of concrete at the initial stage of acid rain corrosion so that it advanced into the damage reduction stage, and accelerate the damage progress of acid rain attack on concretes.And the damage rate of acid rain to concrete increases with the increases of freezing-thawing cycles and acid rain acidity.Microscopic studies demonstrate that this is due to that the frost heave stress caused by freezing-thawing cycles can accelerate acid rain corrosion products to quickly fall away from concrete surface and increase new internal cracks of concretes, and prompts the expansion of the existing micro cracks until link up, so that provides fast channel for acid rain erosion media into concretes.关键词
混凝土/酸雨侵蚀/冻融循环/损伤进程/微观机理Key words
concrete/acid rain attack/freezing-thawing cycle/damage progress/microscopic mechanism分类
建筑与水利引用本文复制引用
王凯,肖勇,林静,任亮..冻融循环对混凝土酸雨侵蚀损伤进程的影响[J].硅酸盐通报,2018,37(6):1979-1982,2007,5.基金项目
国家自然科学基金(51002050,51478183) （51002050,51478183）
江西省青年科学家培养对象计划(20142BCB23012) （20142BCB23012）
江西省高等学校科技落地计划(KJLD13039) （KJLD13039）
