新型粉煤灰基防水涂料制備及性能評(píng)價(jià)

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關(guān)鍵詞：建筑施工；碳化粉煤灰；防水涂料；疏水性能；泡沫混凝土；保溫性能中圖分類號(hào)：TQ630；TU56 文獻(xiàn)標(biāo)志碼：A 文章編號(hào)：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

混凝土結(jié)構(gòu)長期暴露在惡劣的環(huán)境中極易出現(xiàn)破損、強(qiáng)度減小以及耐久性能下降的問題，尤其是在濕度較高或者雨水較多的環(huán)境中，混凝土結(jié)構(gòu)內(nèi)部水分含量增大，而水分中如果含有較多的鹽離子或者酸性氣體（ CO2 和 SO2 ）時(shí)更易引起鹽侵蝕和混凝土中鋼筋的銹蝕，導(dǎo)致其耐久性能降低，縮短混凝土結(jié)構(gòu)的使用壽命[1-2]。（剩余5775字）