摘要
基于装配式建筑用灌浆料的基本性能要求,从石英砂级配、砂灰比、水灰比、外加剂等角度开展对灌浆料工作性和强度的影响研究,在确定的理想配合比的基础上,通过采用低水灰比净浆包裹骨料的方法,探索进一步提高灌浆料抗压强度的可能。研究结果表明：当石英砂级配为20～40目∶40～70目=1∶0.798、水灰比0.26、聚羧酸减水剂0.4%、四硼酸钠5‰、有机硅消泡剂2‰、羟丙基甲基纤维素0.1‰、硫铝酸钙型膨胀剂4%时,灌浆料满足早期强度高、后期强度高、工作性好、微膨胀、自密实、不泌水、不离析等装配式建筑用灌浆料的要求;通过采取低水灰比净浆包裹石英砂的方法,可进一步提升灌浆料的抗压强度。
It bases on the basic performance requirements of grouting material on the prefabricated construction to research the worka-bility and strength of grouting material from aspects of quartz sand gradation,sand-cement ratio,water-cement ratio,additives.On the basis of the determined stoichiometry,the test uses the low water-cement ratio paste to wrap the aggregate to explore higher compressive strength of grout material.The results show that when it is that quartz sand grading 20 mesh to 40 mesh∶40 mesh to 70 mesh is 1∶0.798,water-cement ratio is 0.26,polycarboxylate superplasticizer is 0.4%,sodium tetraborate is 5‰,silicone defoamer is 2‰,hydrox-ypropyl methyl cellulose is 0.1‰and sulphoaluminate expansion agent is 4%.The grouting material meets the requirements of grouting material on prefabricated construction.It owns higher early strength and late strength,good workability,micro expansion,self-compaction, no bleeding and no segregation.By taking a low water-binder ratio paste to wrap quartz sand,it further enhances the compressive strength of grouting material.
出处
《混凝土》
CAS
北大核心
2016年第7期133-137,共5页
Concrete
基金
国家"十二五"科技支撑计划(2012BAJ20B03)
关键词
灌浆料
砂灰比
水灰比
外加剂
高强度
工作性
grouting material
sand-binder ratio
water-binder ratio
admixture
high strength
workability
