C60超细粉煤灰高性能泵送商品混凝土的配制与工程应用  

PRODUCTION AND PROJECT APPLICATION OF C60 HIGH-PERFORMANCE PUMP PREMIXED CONCRETE CONTAINING ULTRA-FINE FLY ASH

作　　者：高英力[1] 周士琼[2] 马保国[3] 

机构地区：[1]长沙理工大学交通运输工程学院,长沙410114 [2]中南大学土木建筑学院,长沙410075 [3]武汉理工大学硅酸盐材料工程教育部重点实验室,武汉430070

出　　处：《建筑技术》2009年第3期225-228,共4页Architecture Technology

基　　金：重庆交通大学(桥梁)结构工程重点实验室开放基金(CQSLBF-Y07-1)

摘　　要：湖南湘潭电厂二期工程C60泵送混凝土掺入超细粉煤灰(UFA)等量取代水泥30%,并采用卵石成功配制了UFA高性能泵送商品混凝土。通过试验室及现场试验相结合,综合测试了混凝土各项性能。结果表明,混凝土拌合物性能优良,坍落度达到18 cm以上,坍落度损失小;硬化混凝土28 d强度满足工程要求的C60强度等级。试验室的耐久性试验结果表明,UFA高性能泵送混凝土的抗氯离子渗透性优良,干缩、抗裂性能等均优于普通混凝土。With the production of C60 pump concrete that is used for the second-stage project in Hunan Xiangtan power plant, ultra-fine fly ash （UFA） that replaced 30% equivalent cement was added into concrete, UFA high-performance pump premixed concrete was obtained by using river pebble successfully, and its some properties were studied by the combination of laboratory and site test. The results indicated that the workability of UFA concrete was well. The slump surpassed 18cm and the slump loss was small. The 28d strengths of the hardened concrete met the construction requirement that should conform to C60 strength grade. It is shown that the Chloride penetration resistance of UFA high-performance pump premixed concrete is excellence according to the experimental results of durability, the dry shrinkage resistance and cracking resistance are better than the ordinary concrete.

关 键 词：超细粉煤灰 泵送商品混凝土 力学性能 耐久性 

分 类 号：TU375[建筑科学—结构工程] TU755