防冻剂对掺减水剂煤矸石混凝土抗冻性能研究

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1、第39卷第1期非金属矿Vo1．39No．12016年1月Non—MetallicMines防冻剂对掺减水剂煤矸石混凝土抗冻性能研究张向东李庆文宋洋(辽宁工程技术大学土木与交通学院，辽宁阜新123000)摘要为探究防冻剂对掺减水剂自燃煤矸石混凝土的抗冻工作性能影响，考虑不同掺量4种防冻剂、不同掺量减水剂和不同冻融介质等因素进行坍落度与冻融试验，分析其坍落度和抗冻融破坏等情况。结果表明：通过拟合分析出防冻剂与减水剂对煤矸石混凝土拌舍物坍落度影响为二次函数关系，掺无机盐防冻剂对其减水剂作用无显著影响，乙二醇对掺减水剂混凝土坍落度有负作用；随无机盐防冻剂掺量增加，劣化

2、煤矸石混凝土抗冻性能显著性逐渐增强，但硝酸钙劣化程度较轻。乙二醇在较低掺量0～1．0％范围，使其抗冻融破坏能力得到提升，提升空间为10％-~30％；无机盐防冻剂对其盐冻融剥蚀性能随掺量增加而降低，小掺量乙二醇增强其抗盐冻性能，其抗剥蚀能力显著性表现为乙二醇>硝酸钙>氯化钙>亚硝酸钙。关键词防冻荆；自燃煤矸石混凝土；坍落度；冻融循环；盐冻剥蚀中图分类号：TU528．042+．6文献标识码：A文章编号：1000-8098(2016)01-0048-04StudyofAnti—freezingAgentonFrostResistanceofCoalGangueCon

3、creteMixingwithWaterReducersZhangXiangdongLiQingwen。Song"fang(SchoolofCivilEngineeringandTransportation，LiaoningTechnologyUniversity,Fuxin，Liaoning123000)AbstractInordertoexploretheefectsofanti—freezingagentontheworkabilitybehaviorandfreezingresistanceofconcretemixingwithwaterreduce

4、rs，concreteslumpandfreezing—thawingtestswerecarriedoutconsideringsensitivityfactorswhichwasfourkindsanddiferentdosagesofanti—freezing，differentdosagesofwaterreduceranddifferentfreezing—thawingmedia，whichanalyzeditsinfluenceonconcreteslumpandfreezing—thawingresistingdamage．Theresults

5、revealthattherelationshipbetweenmixingwithdiferentdosagesofanti—freezingandwaterreduceragentsandconcreteslumpwasquadraticfunctionrelationbyfittinganalysis．Dopedinorganicsaltanti-freezingagentshadnosignificantimpactonwaterreducingagent．Ethyleneglycolhadnegativeefectsonslumpofconcrete

6、mixingwithwaterreduceragent．Thedeteriorationofconcretefrostresistanceperformancehadsignificantlyincreasedwiththeincreasingdosagesofinorganicsaltanti—freezingagents，butcalciumnitratehadlessinfluenceondeterioratingtheconcretefrostresistance．Withthelowerdosagesof0~1．O％ethyleneglyco1．th

7、efreezing—thawingresistingabilityofconcretegotpromoted．whichthespacewas10％-30％．Frost—saltscalingresistanceofconcretedecreasedwithincreasingdosagesofinorganicsaltanti—freezingagents．Withsmalldosagesofethyleneglycol，frost—saltscalingresistanceofconcretegotreinforced．Thesignificanceoff

8、rost—saltscalingres