新型粉煤灰基防水涂料制备及性能评价

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关键词：建筑施工；碳化粉煤灰；防水涂料；疏水性能；泡沫混凝土；保温性能中图分类号：TQ630；TU56 文献标志码：A 文章编号：1005-8249（2025）03-0063-05DOI：10.19860/j.cnki.issn1005-8249.2025.03.012

Abstract：Inorder to improve the waterprof performance ofconcrete structure inbuildingconstruction，carbonizedflyash was preparedbycarbonizationreaction withflyashandcarbideslagasraw materials，andthenanewtypeofflyashbased waterprof coating suitable forbuildingconstructionwasprepared bycombining it withcement，polymerlotionand otheraditives.The influenceoftheamountofcarbonizedflyashontheperformanceof waterprofcoating was investigatedthroughlaboratorytests， andtheinfluenceoftheamountofcarbonizedflyashontheperformanceoffoamconcretewasevaluated.Theresultsshowthat when the mass fraction of carbonized fly ash is 30% ，it has good hydrophobicity，tensile properties，and aging resistance. The surface contact angle can reach over 150∘ ，the tensile strength is3.61 MPa，the elongation at break is 340.85% ，and the tensile strength after28daysof thermalagingcanstillreach3.51MPa.Compared withthe blank foam concretesample，the waterabsorptionandthermalconductivityoftheconcretesamplearesignificantlyreduced，thefrostresistanceissignificantly improved，andtheconcretesamplehasgoodwaterproof propertiesandthermalinsulationefect，whichissuitableforuse inthe waterproof construction of concrete structures.

Key words：constructionof buildings；carbonizedflyash；waterprof coating；hydrophobicperformance；foamconcrete; thermal insulation performance

0 引言

混凝土结构长期暴露在恶劣的环境中极易出现破损、强度减小以及耐久性能下降的问题，尤其是在湿度较高或者雨水较多的环境中，混凝土结构内部水分含量增大，而水分中如果含有较多的盐离子或者酸性气体（ CO2 和 SO2 ）时更易引起盐侵蚀和混凝土中钢筋的锈蚀，导致其耐久性能降低，缩短混凝土结构的使用寿命[1-2]。（剩余5775字）