NEWBUILDINGMATERIALSNEWBUILDINGMATERIALS摘要：在65℃条件下将硫酸铝、二乙醇胺、硫酸镁以一定比例混合溶解，再掺加一种二乙醇胺羧酸酯与硅溶胶的络合稳定剂，合成了高性能无碱无氟液体速凝剂HLA，对其性能进行测试。结果表明：在环境温度-10~30℃条件下速凝剂HLA储存2个月的性能稳定；掺量为7%~8%时，对不同牌号普通硅酸盐水泥的初凝时间为2~4min，终凝时间为6~10min；水泥胶砂6h抗压强度约1.0MPa，1d抗压强度为11.0~15.0MPa，28d抗压强度比>100%，符合Q/CR807—2020《隧道喷射混凝土用液体无碱速凝剂》通用要求。关键词：无碱液体速凝剂；稳定性；适应性；早期强度中图分类号：TU528.042+.1文献标识码：A文章编号：1001-702X（2023）02-0059-04Studyandapplicationofhigh-performancealkali-freeliquidacceleratorLIChongzhi1，DENGSongwen1，DONGPeng2，XIONGMengqin2，WANHailun2，LIGaocai2（1.SchoolofCivilandTrafficEngineering，BeijingUniversityofCivilEngineeringandArchitecture，Beijing100044，China；2.FuzhouIndustrialBranchofChinaRailway11thBureauGroupBridgeCo.Ltd.，Fuzhou344113，China）Abstract：At65℃，aluminumsulfate，diethanolamineandmagnesiumsulfateweremixedanddissolvedinacertainproportionintoasolution，andthenacomplexingstabilizerofdiethanolaminecarboxylateesterandsilicasolwasaddedtosynthesizehighperformancealkali-freefluorine-freeliquidacceleratingagentHLA.Thenitspropertiesweretested.TheexperimentalresultsshowthattheperformanceofHLAacceleratorisstablewhenstoredatambienttemperatureof-10~30℃for2months.Accordingtothecontentof7%~8%fordifferentordinaryPortlandcement，thesettingtimemeetstheinitialsettingof2~4min，thefinalsettingof6~10min：Thecompressivestrengthofcementmortarisabout1.0MPain6h，11.0~15.0MPain1d，andthecompressivestrengthratiois>100%in28d，meetingthegeneralrequirementsofQ/CR807—2020"Liquidalkali-freeacceleratingagentfortunnelshotcrete".Keywords：alkali-freeliquidaccelerator，stability，adaptability，earlystrength0引言高性能无碱液体速凝剂是喷射混凝土高性能化必不可少的化学外加剂。随着喷射混凝土施工工艺的提高，速凝剂的发展经历了粉体速凝剂，液体高碱、液体低（无）碱速凝剂3个过程。随着国家交通网络的不断延伸和...
