矿物掺和料和再生骨料对再生混凝土工作性的影响  

Influence of Mineral Admixture and Recycled Aggregate on Workability of Recycled Concrete

作　　者：曹剑[1] 张健[1] 李秋义[1] 

机构地区：[1]青岛理工大学土木工程学院,青岛266033

出　　处：《青岛理工大学学报》2009年第4期140-144,165,共6页Journal of Qingdao University of Technology

基　　金：国家"十一五"科技支撑计划重点课题资助项目(2006BAJ02B0504)

摘　　要：本试验利用废弃混凝土制作再生骨料混凝土,并分析了再生骨料的种类、取代率、粉煤灰、矿粉等矿物掺和料的掺量诸因素对再生混凝土工作性的影响.结果表明:颗粒整形再生粗骨料混凝土的用水量接近于天然骨料混凝土;颗粒整形再生细骨料混凝土的用水量高于天然骨料混凝土的用水量;粉煤灰、普通矿粉、超细矿粉、硅灰等矿物掺和料能明显改善混凝土的坍落度、和易性.In this paper,the recycled aggregate is made of waste concrete. The influences on workability of recycled concrete have been analyzed, which include the type of the recycled aggregate, the replace rate of recycled aggregate, the amount of fly ash, slag, and other mineral admixture factors. The results show that the water consumption of particle shaping recycled coarse aggregate concrete is close to that of natural aggregate concrete. The water consumption of particle shaping recycled fine aggregate concrete is higher than that of natural aggregate concrete. Fly ash, slag-general, ultra-fine slag and silica fume can significantly improve the slump and workability of concrete.

关 键 词：矿物掺和料 工作性 用水量 再生骨料 

分 类 号：TU528[建筑科学—建筑技术科学]