BFJ聚羧酸系混凝土泵送剂在辽沈地区的应用研究  

Study on the BFJ polycarboxylate concrete pumping aid adhibition in Liaoning Shengyang area

作　　者：李晓[1] 于红梅 

机构地区：[1]沈阳建筑大学材料科学与工程学院,辽宁沈阳110168 [2]沈阳兴北商品混凝土有限公司,辽宁沈阳110000

出　　处：《混凝土》2009年第12期61-64,共4页Concrete

摘　　要：采用不同缓凝组分和BFJ聚羧酸高效减水剂试验复配,确定了有机胺和葡萄糖酸钠复合掺加的较优BFJ聚羧酸系混凝土泵送剂配合比。该泵送剂初始减水效果好,坍落度增加值达135mm;保塑优异,60min几乎无坍落度损失;对混凝土促强作用明显,3d抗压强度比达141%,7d抗压强度比达134%,28d抗压强度比达122%。该泵送剂拌制混凝土拌合物和易性优异,对辽沈地区水泥的适应性较好,不低于甚至优于萘系泵送剂,对粉煤灰、砂、石质量也无苛刻要求,可以替代现有萘系泵送剂,满足泵送混凝土施工要求。Using different retarder and BFJ polycarboxylate-type superplasticizers,a large numbers of examinations are completed.The BFJ concrete pumping aid with organic amine and glucose-acid Na acts well.With the pumping aid,the slump increases 135 mm,and the loss of 60 m in is little.The 3,7,28 d strength ratio is 141%,134% and 122%.The compatibility of BFJ with different cements is better.The effect of different fly ash,sand or stone is little.So the BFJ can act well in the concrete of Liaoning Shengyang area.

关 键 词：聚羧酸 混凝土 坍落度 强度 

分 类 号：TU528.042[建筑科学—建筑技术科学]