盐渍土环境输电线路基础防腐蚀技术对比试验研究  

Study on sulfate corrosion-resistance technology for concrete of transmission lines in saline soil environment

作　　者：孟振亚 王学明 谢德擎 袁俊 石亮 魏鹏 姜骞 朱梦伟 MENG Zhenya;WANG Xueming;XIE Deqing;YUAN Jun;SHI Liang;WEI Peng;JIANG Qian;ZHU Mengwei(State Key Laboratory of High Performance Civil Engineering Materials,Nanjing 210008,China;Jiangsu Sobute New Materials Co.,Ltd.,Nanjing 211103,China;Northwest Electric Power Design Institute Co.,Ltd.,China Power Engineering Consulting Group,Xi′an 710075,China;Shanghai Suke Building Technology Development Co.,Ltd.,Shanghai 201399,China)

机构地区：[1]高性能土木工程材料国家重点实验室,江苏南京210008 [2]江苏苏博特新材料股份有限公司,江苏南京211103 [3]中国电力工程顾问集团西北电力设计院有限公司,陕西西安710075 [4]上海苏科建筑技术发展有限公司,上海201399

出　　处：《混凝土》2020年第11期26-30,共5页Concrete

基　　金：国家重点研发计划(2017YFB0309904);中国电力工程顾问集团科技项目(DG1-T02-2017);江苏省重点研发计划(BE2017158);江苏省住房和城乡建设厅科技项目(2018JH017);江苏省自然科学基金资助(BK20171111,BK20181127);中国铁路总公司科技项目(2017G007-C)。

摘　　要：在输电线路基础常用混凝土配合比中掺入粉体防腐剂或液体抗侵蚀介质抑制剂,系统对比各配合比混凝土的新拌性能、力学性能、吸水率性能、氯离子快速迁移系数与抗硫酸盐半浸泡性能,结合X射线衍射仪对比腐蚀产物信息,明确了各配合比混凝土试件的抗盐结晶性能,并建立了抗盐结晶性能与混凝土测试指标的联系。研究表明:掺入粉体防腐剂后混凝土的抗盐结晶性与基准组相差无几,而掺入液体抗侵蚀介质抑制剂后混凝土的抗盐结晶性则大幅度提升,源自于掺入液体侵蚀介质抑制剂后试块的吸水速率变慢,盐水很难被传输至高位、且表面挥发缓慢。Powder sulfate inhibitor or liquid erosion inhibitor were mixed with commonly proportions of concrete mix of transmission lines in saline soil environment,the property of fresh concrete,mechanical property,water absorption,rapid chloride ion migration coefficient and resistance to sulfate half soaking performance were systematically studied.It cleared the sulfate half soaking performance and established the salt-resistance ability with concrete test index.Study showed the salt-crystal resistance ability of concrete mixed with powder sulfate inhibitor was almost the same as that of the reference concrete,while salt-crystal resistance resistance ability of concrete mixed with liquid erosion inhibitor was greatly improved,which was caused by the slow water absorption rate of test block after mixing liquid erosion inhibitor,and the saltwater was difficult to be transported to high position and the surface volatilization rate was slow.

关 键 词：盐渍土 输电线路基础 抗侵蚀介质抑制剂 粉体防腐剂 抗盐结晶性能 吸水性能 

分 类 号：TU528.33[建筑科学—建筑技术科学]