透水模板布改善混凝土耐久性试验研究  

Study on durability of concrete improved by controlled permeable formwork liner

作　　者：唐崇正[1] 田正宏[2,3] 毛龙[2] 梁小勇[1] 

机构地区：[1]中国水利水电第七工程局有限公司,四川成都610081 [2]河海大学水利水电学院,江苏南京210098 [3]河海大学水文水资源与水利工程科学国家重点实验室,江苏南京210098

出　　处：《混凝土》2013年第5期42-45,49,共5页Concrete

基　　金：江苏省自然科学基金(BK2010517);南水北调工程科技创新(NSBD-SNEZ(F)/KY-01-20-2010);江苏省水利科技重点项目(2009021)

摘　　要：为研究透水模板布对混凝土构件耐久性的影响,运用抗冲磨法、抗收缩法、碳化法、抗渗法、单面冻融法、以及压汞法和SEM理论从外部环境和内部材料两方面分析透水模板布改善混凝土微观结构和抵抗各种劣化机理。试验结果表明:透水模板布可提高混凝土表层抗冲磨性能,抑制早期收缩,优化孔隙分布,改善覆盖质量,阻碍侵蚀性介质侵入,减缓表层混凝土劣化过程,提高构件耐久性能。In order to investigate the influence factors of controlled permeable formwork liner on concrete durability, abrasion-resisting method, anti shrinkage method, carbonization method, anti-permeability method, one side freeze-thaw method, mercury intrusion method and scanning electron microscope theory were used to analyze the mechanism of controlled permeable formwork liner help concrete member against degradation from two aspects of external environment and internal material.The results indicated that after applying controlled permeable formwork liner the covering quality and abrasion-resisting performance of surface concrete was enhanced, early shrinkage was restrained, the pore distribution of cover concrete was optimized and the concrete degradation process was slowed down by hinder corrosive mediums penetrating into concrete, hence the durability performance of concrete structure was improved.

关 键 词：透水模板布 耐久性 抗冲磨 抗收缩 致密度 孔径分布 

分 类 号：TU528.01[建筑科学—建筑技术科学]