煤矸石粉制备混凝土用复合掺合料的性能研究

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DOI： 10.19860/j.cnki.issn1005-8249.2024.01.004

WANG Jianhua’，LAI Yiliang1，LIU Gang1，YANG Feng2，LIU Jianxin’，LI Guangsheng' （1.East China Survey and Design Institute（Fujian） Co.，Ltd.，Fuzhou 361OO5，China； 2.School of Civil Engineering，Fujian University of Technology，Fuzhou 35O108，China）

Abstract：Thecompositemineraladmixturesforconcretewerepreparedbypartiallyeplacingflyashwithcoalganguepowder.The effectsofcoal ganguepowder，flyashandphosphorusslagontheflexuralstrength，compresivestrength，activityindexadstregth growthratioofthetestedmortarwerestudiedthroughorthogonalexperiments.Theresultsshowedthattherewasastronginteraction betweenganguepowder，flyashandphosphorusresidueonthehydrationofcement，andwhenthedesignmixatioisapropriate，the7 day and 28- dayactivityindexandstrength growthratioof thetestedgumsandreachedtherequirementsoftheordinarygrade Il compositemineraladmitureofompositeadmixtureforonceteinicatingtatiwasompletelyfasibletopreparecompositeial admixture for concrete by replacing flyash with gangue powder，and the optimal scheme is to add 25. 0% coal gangue powder， 62.5% fly ash，and 12.5% phosphorus slag.

Keywords：gangue powder；fly ash；composite admixtures；concrete；phosphorus residue；property

0引言

混凝土掺合料是为改善混凝土性能，节约用水，调节混凝土强度等级，在混凝土拌和时掺入天然的或人工的能改善混凝土性能的粉状矿物质[1]。（剩余4650字）