Comparison of rheological properties containing natural and crushed sands in self-compacting concretes
In recent, the crushed sand as a fine aggregate has increasingly used for concrete industry due to the shortage of natural sand from river and the growing demand for protection of natural environments.Aggregates may have a significant influence on the properties of self-compacting concrete (SCC) including self-compacting mortar (SCM). The rheological properties of SCC and SCM using crushed sand as a fine aggregate has been compared to that of SCC and SCM using natural sand and mixed sand of both. Test results indicate that the yield stress of SCM containing 50％ of mixed sand present higher than those prepared with natural sand and crushed sand according to SP content, the slump values of SCC with natural sand have approximately 5-15％higher than those of SCC with crushed sand.Also the L-box test values (H2/H1) of SCC with natural sand have approximately 20-30 higher than those of SCC with crushed sand under same water/cement ratio and viscosity enhancing admixture.
Rheology Crushed sand Slump flow self-compacting mortar self-compacting concrete
Keunsu Lee Yeol Chol Woong Jung Jaeik Lee
School of Architecture & Civil Engineering,Kyungpook National University,Daegu,Korea
国际会议
北京
英文
885-887
2008-10-01（万方平台首次上网日期，不代表论文的发表时间）