自密实轻骨料混凝土工作性能的研究  

Workability of self-compacting lightweight aggregate concrete

作　　者：何廷树[1] 王振军[1] 伍勇华[1] 宋学锋[1] 

机构地区：[1]西安建筑科技大学建筑材料研究所,陕西西安710055

出　　处：《西安科技大学学报》2004年第4期422-425,437,共5页Journal of Xi’an University of Science and Technology

摘　　要：采用改进的L-800自密实混凝土拌合物流变性能测定仪,通过测定混凝土拌合物流过40cm,同时结合扩展度值、坍落度值及1h坍落度、扩展度损失情况,介绍了粉煤灰掺量、砂率大时的时间t40小、外加剂品种和硅灰掺量对自密实轻骨料混凝土拌合物工作性的影响。结果表明,30%左右Ⅰ级粉煤灰、50%左右体积砂率、2%～6%硅灰掺量和掺有粘塑组分的复合高效减水剂是保证自密实轻骨料混凝土拌合物具有较好工作性能的关键。The influences of fly ash, sand ratio, kinds of chemical admixtures and dosages of silicon fume on mixtures of self-compacting lightweight aggregate concrete were introduced by the ways of adopting L-800 rheological testing apparatus of concrete mixtures mended to test the value of t(40),which was the time when concrete mixtures flowing the length of 40 cm, combining with the values of expansion, slump and losses of both after an hour at the same time. The result indicated that the key techniques ensuring SCLC to have good workability were about 30% first-grade fly ash, about 50% volume sand ratio,2%～6% dosages of silicon fume and compounded superplasticicizers with viscous ingredient.

关 键 词：自密实轻骨料混凝土 工作性能 矿物掺合料 复合高效减水剂 

分 类 号：TU528.2[建筑科学—建筑技术科学]