养护剂对混凝土耐久性能的影响  

Effects of Curing Agent on Durability Performances of Concrete

作　　者：石亮[1] 刘建忠[1] 刘加平[1] 

机构地区：[1]江苏省建筑科学研究院有限公司,南京210008

出　　处：《混凝土与水泥制品》2010年第5期19-23,共5页China Concrete and Cement Products

基　　金：国家自然科学基金资助项目(2009CB623205);西部交通建设科技项目(2006ZB12)

摘　　要：喷涂养护剂作为一种新型的养护方式正逐步被应用于混凝土工程领域。试验对比研究了养护剂对混凝土收缩性能、氯离子渗透性能、碳化性能及抗冻性能的影响。结果表明:涂覆养护剂对混凝土有较明显的减缩效果,7d减缩率在30%以上。相比标准养护及干燥养护,涂覆养护剂的混凝土抗氯离子渗透性能最好。涂覆养护剂能够提高低掺量粉煤灰混凝土的抗碳化性能。涂覆养护剂可改善无掺合料混凝土的抗冻性能,对掺有粉煤灰的混凝土抗冻性能提升不明显。Coating with curing agent is being used in field of concrete engineering as a new kind of curing method.The effects of curing agent on the shrinkage,chloride ion penetration,carbonation and frost resistance of concrete are comparatively investigated.The results show that coating with curing agent can obviously reduce shrinkage of concrete and the shrinkage reducing ratio is above 30% at early age（7d）.Comparing with standard curing and dry curing,concrete specimen coated with curing agent gets the best chloride ion pen-etration resistance.Coating with curing agent enhances the carbonation resistance of concrete with low amount of fly ash.Coating with curing agent can improve the frost resistance of concrete without mineral admixtures,however,the improvement becomes weak when fly ash was adding into concrete.

关 键 词：养护剂 收缩 氯离子渗透 碳化 抗冻性 

分 类 号：TU528[建筑科学—建筑技术科学]