高强轻集料混凝土桥面施工泵送技术  

Pumping technology of high-strength light weight aggregate concrete on bridge construction

作　　者：丁庆军[1] 张勇[1] 王发洲[1] 黄志刚 叶家军 张学锋 胡曙光[3] 

机构地区：[1]武汉理工大学,湖北武汉430070 [2]湖北省交通厅,湖北武汉430070 [3]湖北大学,湖北武汉430070

出　　处：《混凝土》2002年第1期58-60,共3页Concrete

基　　金：湖北省交通厅科技攻关项目 ( 2 0 0 1-0 0 10 )

摘　　要：轻集料混凝土 (LWAC)由轻质多孔集料和水泥石胶结而成。在施工过程中 ,LWAC由于集料多孔的性质 ,会从水泥浆中吸收水分 ,造成混凝土坍落度的降低 ,影响混凝土的泵送性能 ;另外 ,LWAC的收缩变形比普通混凝土大 ,更易使混凝土形成裂缝。通过对LWAC高性能化等技术手段 ,配制出干表观密度小于 195 0kg/m3 ,易于泵送和体积稳定性好的混凝土。使纤维增强泵送高强 (CL40 )Light weight aggregate concrete(LWAC)is composed of light weight poriferous aggregate and cement paste.Under the condition of pumping pressure,the aggregate will absorb some water from grout due to its poriferous character.Therefore,the slump of LWAC will reduce,and the pumping performance of LWAC becomes bad.In addition,the shrinkage of LWAC is bigger than that of Normal Concrete(NC),so the crack will bring about unavoidable.In this paper,the problems of pumping LWAC are resolved successfully through some technology.The bridge project,CaiDian HanJiang River,applies our technology firstly in China,and the effect is ideal.

关 键 词：轻集料 高强泵送 抗裂 桥面 工程施工 混凝土 

分 类 号：U444[建筑科学—桥梁与隧道工程]