轻集料的吸水率与预处理时间对混凝土工作性的影响  

Influence of Water Absorption and Pre-wetted Method of Lightweight Aggregate on the Workability of Concrete

作　　者：胡曙光[1] 王发洲[1] 丁庆军[1] 彭波 

机构地区：[1]武汉理工大学材料科学与工程学院,湖北武汉430070 [2]武汉市商品混凝土管理站,湖北武汉430015

出　　处：《华中科技大学学报（城市科学版）》2002年第2期1-4,共4页Journal of Huazhong University of Science and Technology

基　　金：湖北省重点科技攻关项目 ( 2 0 0 1AA10 3B0 1)

摘　　要：轻集料的预湿处理时间对混凝土性能尤其是工作性能的影响非常显著 ,因此研究了三种类型陶粒的孔结构与吸水率的关系以及预处理时间对混凝土工作性能的影响规律 .研究表明 ,根据陶粒的初始吸水率、吸水率随饱水时间的变化以及压力吸水率等指标 ,选择合适的预处理时间 。Lightweight aggregate must be pre-wetted before mixing. The pre-wetting time is a main factor to the properties of concrete, especially to the workability. The relationship between the pore structure of lightweight aggregate and absorption, and the influence of absorption on the workability of concrete are studied. By the absorption at 0.5 hour and absorption development with pre-wetting time as well as absorption under the condition of pressure, the new method about how to reduce the slump damage and improve the workability is obtained.

关 键 词：轻集料 吸水率 混凝土 孔结构 高强度混凝土 

分 类 号：TU528.041[建筑科学—建筑技术科学]