新型无碱液体速凝剂的制备与性能研究.pdf

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1、全国中文核心期刊新癯建巍粉押中国科技核心期刊新型无碱液体速凝剂的制备与性能研究杨力远1，田俊涛“z，胡小峰3，杨艺博4(1．郑州大学材料科学与工程学院，河南郑州450052；2．思研建材科技有限公司，河南郑州450052；3．黄河建工集团有限公司，河南郑州450045；4．南安普顿大学土木工程学院，英国南安普顿S0171BJ)摘要：采用硫酸铝、氟铝络合溶液、草酸、二乙醇胺、稳定剂为主要原材料合成无碱液体速凝剂，对其匀质性指标进行了测试，并测试了该速凝剂对水泥凝结时间、胶砂强度的影响以及与水泥的适应性。并通过XR

2、D、SEM等手段对该速凝剂促凝机理进行分析。结果表明，该速凝剂掺量6％时可使长城P·042．5水泥2．3min初凝，7．4min终凝，1d抗压强度比为148％，28d抗压强度比为106％。该速凝剂在6％～8％掺量范围内，对不同品牌的P·042．5水泥及长城P·152．5、P·C32．5具有良好的适应性。添加该速凝剂提高了水泥浆体中【Al(0H)4]一的浓度，促进了钙矾石的生成，钙矾石在水泥颗粒间搭接使水泥速凝。关键词：速凝剂；硫酸铝；草酸：适应性；二乙醇胺中图分类号：TU528．42文献标识码：A文章编号：10

3、01—702X(2017)05—0029—04Studyonpreparationandperformanceofnewalkali-freeliquidacceleratorYANGLiyanga，TIANJunt001,2HUXiaofen93，YANGYib04(1．MaterialScienceandEngineeringInstitute，ZhengzhouUniversity，Zhengzhou450052，China；2．SiYanBuildingMaterialsTechnologyCo．Ltd

4、．，Zhengzhou450052，China；3．YellowRiverConstructionandEngineeringGroupCo．Ltd．，Zhengzhou450045，China；4．CivilEngineeringInstitute，UniversityofSouthampton，SouthamptonS0171BJ，UK)Abstract：Analkali-freeliquidsettingacceleratorwaspreparedusingaluminumsulfate，fluoride

5、aluminumcomplexsolution，oxalicacid，diethanolamineandstabilizerasmainmaterials．Homogeneityindexofthealkali-fleesettingacceleratorWS,Stested．Theinfluenceofacceleratoronthesettingtimeandstrengthofmortaraswellastheadaptationofcementwereinvestigated．Themechanismo

6、falkali-freeacceleratorWasanalyzedbymeansofXRDandSEM．TheresultsindicatedthattheinitialsettingtimeandfinalsettingtimeoftheGreatWallP-042．5cementwere2．3rainand7．4minrespectively，the1dand28dcompressivestrengthratiowere148％and106％respectivelywhenthedosageofliqui

7、dacceleratorwas6％．TheliquidsettingacceleratorhasgoodadaptabilitywithP·042．5cementofdifferentbrands，theGreatWallP·152．5cementandP·C32．5cementwhenthedosagewasvar—iedbetween6％to8％．Theconcentrationofpresentincementpastewasincreasedbytheadditionofthealkali-fleeac

8、celerator，thuspromotingthecrystallizationofettringitebetweenthecementparticles，thusconnectingthemandacceleratingthesetting．Keywords：accelerator，aluminumsulfate，oxalicacid，compatibility，diethanol