14·2023年5月试验与研究江西建材灌注无机保温芯材的烧结复合保温砌块制备关键技术研究曾兴华12,杨良12,吴炎平1,21.江西省建材科研设计院有限公司,江西南昌330001;2.江西省建材产品质量监督检验站有限公司,江西南昌330001摘要:文中研究了一种灌注保温芯材的城市污泥烧结复合保温砌块。混合料的塑性指数和热值是制备烧结保温砌块两个重要技术指标,按照城市污泥:页岩:煤研石为10:70:20的比例制得的混合料塑性指数为12.1,干燥敏感性系数为0.6,烧制的保温砌块表面平整,无过烧、欠火等质量问题。掺入适量的速凝剂(SQ)或SAC可制备出稳定不塌模的保温芯材,其干密度为197kg/m²、抗压强度为0.35MPa、导热系数为0.0703W/(mK)。经孔型孔结构设计,综合利用孔洞内空气与保温芯材对热流的阻隔作用,提高复合保温砌块的保温性能。制备的城市污泥烧结复合保温砌块的干密度为1089kg/m²、抗压强度为5.9MPa、传热系数K值为1.27W/(m²·K),可应用于建筑外墙自保温围护结构体系。关键词:城市污泥;发泡水泥;保温芯材;烧结复合保温砌块中图分类号:TU522.3文献标识码:A文章编号:1006-2890(2023)05-0014-03ResearchonKeyTechnologiesforthePreparationofSinteredCompositeInsulationBlockswithInjectedInorganicInsulationCoreMaterialsZengXinghual,YangLiang",WuYanping"1,21.JiangxiBuildingMaterialsResearchandDesignInstituteCo.Ltd.,Nanchang,Jiangxi330001;2.JiangxiBuildingMaterialsProductQualitySupervisionandInspectionStationCo.Ltd.,Nanchang,Jiangxi330001Abstract:Thisarticlestudiesatypeofurbansludgesinteredcompositeinsulationblockfilledwithinsulationcorematerials.Theplasticityindexandcalorificvalueofthemixturearetwoimportanttechnicalindicatorsforpreparingsinteredinsulationblocks.Theplasticityindexofthemixturepreparedintheratioof(urbansludge:shale:coalgangue)(10:70:20)is12.1,andthedryingsensitivitycoefficientisO.6.Thesurfaceofthefiredinsulationblocksisflat,withoutqualityissuessuchasoverburningorunderfire.Astableandnoncollapsinginsulationcorematerialcanbepreparedbyaddinganappropriateamountofaccelerator(SQ)orSAC,withadrydensityof197kg/m,compressivestrengthof0.35MPa,andthermalconductivityof0.0703W/(mK).Throughthedesignofholestructure,theinsulationperforman...