模拟酸雨侵蚀环境下普通混凝土腐蚀机理及时效性能研究进展  

Research progress on corrosion mechanism and aging performance of ordinary concrete under simulated acid rain erosion

作　　者：靳红华 任青阳 肖宋强[1,2] 王飞飞 陈斌 JIN Honghua;REN Qingyang;XIAO Songqiang;WANG Feifei;CHEN Bin(State Key Laboratory of Mountain Bridge and Tunnel Engineering,Chongqing Jiaotong University,Chongqing 400074,China;School of Civil Engineering,Chongqing Jiaotong University,Chongqing 400074,China)

机构地区：[1]重庆交通大学山区桥梁及隧道工程国家重点实验室,重庆400074 [2]重庆交通大学土木工程学院,重庆400074

出　　处：《自然灾害学报》2022年第6期1-14,共14页Journal of Natural Disasters

基　　金：国家自然科学基金项目(U20A20314,41472262);重庆市自然科学基金重点项目(cstc2020jcyj-zdxmX0012);重庆市高校创新研究群体项目(CXQT19021);首批重庆英才创新领军人才(CQYC201903026);重庆市研究生科研创新项目(CYB21210)。

摘　　要：为深化对酸雨侵蚀环境下混凝土腐蚀机理及时效性能演变机制的认识,论述了酸雨侵蚀作用下混凝土材料腐蚀机理;归纳总结了已有酸雨侵蚀混凝土理论模型;梳理了酸雨单因素作用、酸雨-环境因子耦合作用、酸雨-荷载作用及酸雨-环境因子-荷载作用4种环境下混凝土材料物理力学性能演变过程的最新进展及研究不足,并展望了未来的研究方向与重点。研究结果表明:考虑酸雨离子成分交互作用的酸雨腐蚀混凝土机理尚未清晰,已有酸雨侵蚀混凝土理论模型缺乏扩展性,酸雨侵蚀作用下混凝土时效性能虽取得一定成果,但室内加速试验规范尚未统一,且多忽略了实际混凝土结构承载状态及服役环境的复杂性及时变性,所获混凝土物理力学性能依时变化规律仅适用于特定试验环境,同时由于试验工况单一导致试验数据匮乏,对混凝土-酸雨-环境因子-荷载相互作用机制揭示不足,仍需增设试验工况,扩大试验延度,加强混凝土细观结构演变及微观化学分析,进一步探索酸雨侵蚀混凝土机理,改进混凝土时效性能量化指标及评价体系,完善混凝土-酸雨-环境因子-荷载多场关联下混凝土时效性能研究。In order to deepen the understanding of the corrosion mechanism and aging performance evolution mechanism of concrete under acid rain erosion environment,the corrosion mechanism of concrete materials under acid rain erosion was discussed. The existing theoretical models of concrete erosion by acid rain were summarized.The latest progress and research deficiencies of the evolution process of physical and mechanical properties of concrete materials under four types of environments,namely acid rain single factor,acid rain-environmental factor coupling,acid rain-load and acid rain-environmental factor-load,were sorted out,and the future research directions and priorities were foreseen. The results show that the mechanism of acid rain corrosion of concrete considering the interaction of acid rain ion composition is not yet clear,and the existing theoretical model of acid rain erosion of concrete lacks scalability. Although some results have been achieved in the temporal performance of concrete under the effect of acid rain erosion,the indoor accelerated test specifications have not been unified,and the complexity and time-varying of the actual concrete structure bearing state and service environment are mostly ignored. The obtained time-dependent variation law of the physical and mechanical properties of concrete is only applicable to specific test environments. At the same time,due to the lack of experimental data caused by the single test condition,the interaction mechanism of concrete-acid rain-environmental factors-load is not sufficiently revealed. It is still necessary to add test conditions,expand the test extension,strengthen the evolution analysis of concrete mesostructure and micro chemical analysis,further explore the mechanism of acid rain erosion of concrete,improve the quantitative index and evaluation system of concrete aging performance,and improve the research on the aging performance of concrete under the multi field correlation of concrete,acid rain,environmental factors and load.

关 键 词：普通混凝土 酸雨侵蚀 环境因子 荷载作用 腐蚀机理 时效性能 

分 类 号：TU528[建筑科学—建筑技术科学]