酸雨环境下混凝土中性化及抗压强度研究  

Concrete neutralization depth and compressive strength research under acid rain environment

作　　者：陈梦成[1] 韩英俊[1] 谢力[1] 夏峰[1] 

机构地区：[1]华东交通大学土木建筑学院建筑过程模拟与控制江西省重点实验室,江西南昌330013

出　　处：《混凝土》2015年第1期9-12,共4页Concrete

基　　金：国家自然科学基金项目(51378206);江西省重大科技创新项目(20114ACB01000);江西省教育厅科技计划落地项目(赣财教(2011)243号);江西省优势科技创新团队项目(20133BCB24008)

摘　　要：依据江西酸雨的实际情况,采用p H=3.5,SO2-4离子浓度分别为0、0.06、0.1、0.15 molL的四种酸雨溶液进行模拟不同的酸雨环境。为了得到酸雨对混凝土耐久性的影响,采用干湿交替的试验方法分析研究了受侵蚀混凝土外观、中性化和立方体抗压强度的变化规律。试验结果表明:随着侵蚀时间的延长,试件外观逐渐劣化;中性化深度随着SO2-4离子浓度的增大而增大;立方体抗压强度随侵蚀时间先缓慢增大后快速减小,并且,随着SO2-4离子浓度的增大,劣化现象更加明显。According to the actual situation of acid rain in Jiangxi, four kinds of solutions with pH of 3.5 and SO4^2- ion concentrations of 0,0.06,0.1,0.15 mol/L were prepared to simulate the acid situation in laboratory. In order to analysis the effect of acid rain to concrete, cube compressive strength, neutralization depth and appearance were determined using of alternating wet with dry accelerated test method. It is shown that, the appearance of the concrete deteriorated significantly with the extension of corrosion time;neutralization depth continued to increase with increasing concentration of SO4^2- ions;cube compressive strength increased first slowly and then decreased with the extension of corrosion time;deterioration became more and more seriously with the increase of concentration of SO4^2- ion.

关 键 词：混凝土 酸雨 中性化深度 抗压强度 

分 类 号：TU528.01[建筑科学—建筑技术科学]