西部恶劣自然环境下硫酸钠半浸泡混凝土抗压性能
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摘要
研究了西部大温差、大湿差的自然环境下,早期受5%和10%两种硫酸钠溶液半浸泡混凝土28d抗压强度.结果表明:硫酸钠溶液浓度越高,半浸泡混凝土28d抗压强度下降越大;10%硫酸钠溶液半浸泡混凝土28d抗压强度比仅自然干湿条件下降27.2%.
Compressive strengths of twenty-eight day for ordinary concrete partly submerged in 5% and 10% sodium sulfate solution in its early stage under natural large temperature difference and large relative humidity difference in the west of China are studied.The results show that the higher concentration of solution leads to bigger compressive strength loss.Compared with only natural dry-wet,the loss ratio of compressive strength of twenty-eight day for concrete partly submerged in 10% sodium sulfate solution reaches 27.2%.
Compressive strengths of twenty-eight day for ordinary concrete partly submerged in 5% and 10% sodium sulfate solution in its early stage under natural large temperature difference and large relative humidity difference in the west of China are studied.The results show that the higher concentration of solution leads to bigger compressive strength loss.Compared with only natural dry-wet,the loss ratio of compressive strength of twenty-eight day for concrete partly submerged in 10% sodium sulfate solution reaches 27.2%.
引文
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[2]梁咏宁,袁迎曙.硫酸盐腐蚀后混凝土单轴受压本构关系[J].哈尔滨工业大学学报,2008,40(4):532-535.
[3]SAHMARAN M,ERDEM T K,YAMAN I O.Sulfate resistance of plain and blended cements exposed to wetting-drying and heating-cooling environments[J].Construction&Building Materials,2007,21(8):1771-1778.
[4]高润东,赵顺波,李庆斌,等.干湿循环作用下混凝土硫酸盐侵蚀劣化机理试验研究[J].土木工程学报,2010,(2):48-54.
[5]王海龙,董宜森,孙晓燕,等.干湿交替环境下混凝土受硫酸盐侵蚀劣化机理[J].浙江大学学报:工学版,2012,46(7):1255-1261.
[6]梁咏宁,袁迎曙.硫酸钠和硫酸镁溶液中混凝土腐蚀破坏的机理[J].硅酸盐学报,2007,35(4):504-508.
[7]王恺.环境气候与混凝土的结晶类腐蚀[J].勘察科学技术,1992(1):6-9.
[8]张洪亮,朱月风,韩劲草.硫酸盐渍土地区半埋混凝土耐久性研究[J].混凝土,2015(10):4-8.
[9]金祖权,赵铁军,孙伟.硫酸盐对混凝土腐蚀研究[J].工业建筑,2008,38(3):90-93.
[10]王琴,杨鼎宜.干湿循环对混凝土硫酸盐侵蚀的影响[J].混凝土,2008(3):22-24.
[11]马昆林.混凝土盐结晶侵蚀机理与评价方法[D].长沙:中南大学,2009:84-85.
[12]马昆林,龙广成,谢友均.硫酸盐半浸泡侵蚀下水泥基材料中腐蚀产物的试验研究[J].混凝土,2013(9):33-35.