摘要
研究了再生粗、细骨料取代量、矿物掺和料等因素对再生混凝土强度的影响.结果表明:高品质再生细骨料混凝土的强度高于天然骨料混凝土,且随着再生细骨料取代量的增加而增大;高品质再生粗骨料混凝土的强度接近天然骨料混凝土强度;在高效减水剂的作用下,粉煤灰、矿粉和硅灰大掺量复掺,可制备工作性能良好、早期强度满足要求和后期强度有极好发展的高性能混凝土;再生骨料和各种掺和料的适应性比较好,超细矿粉和普通矿粉复掺能够明显提高再生混凝土强度.
The influences of the replacement rate of recycled coarse and fine aggregate, mineral admixture on the strength of high-performance recycled concrete are studied in the present paper. The results indicates as follows; the strength of high-quality reeyeled fine aggregate concrete is higher than that of natural aggregate concrete, and it inereases with the replacement rate. The strength of high-quality recycled coarse aggregate concrete is close to that of natural aggregate concrete. By large amount combined admixture of fly ash, slag and silicon fume as well as the usage of super plasticizer, high-performance recycled aggregate concrete with good workability, high early strength and the well developed late strength is a- ble to be attained. Reeycled aggregate has good adaptability to various mineral admixtures and both superfine slag and the general slag co-doped are able to significantly increase the strength of recycled concrete.
出处
《青岛理工大学学报》
CAS
2008年第6期16-21,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)
关键词
废弃混凝土
高品质再生骨料
强度
高性能
矿物掺和料
abandoned concrete
high-quality recycled aggregate
strength
high-performance
mineral admixture
