Pumpability of Manufactured Sand Self-compacting Concrete  

作　　者：LI Huajian HUANG Fali TU Haifeng SUN Deyi WANG Zhen YI Zhonglai YANG Zhiqiang XIE Yongjiang 

机构地区：[1]Railway Engineering Research Institute,China Academy of Railway Science Corporation Limited,Beijing 100081,China [2]School of Civil Engineering,Beijing Jiaotong University,Beijing 100044,China [3]China Railway Engineering Design and Consulting Group Co.,Ltd Beijing 100055,China

出　　处：《Journal of Wuhan University of Technology(Materials Science)》2023年第6期1382-1390,共9页武汉理工大学学报（材料科学英文版）

基　　金：Funded by the National Natural Science Foundation of China(Nos.U1934206 and 52108260);the Foundation of China Academy of Railway Science Corporation Limited(No.2020YJ049)。

摘　　要：By the addition of superplasticizer and air entraining agent,manufactured sand selfcompacting concrete(MS SCC)with slump flow varying from 500 to 700 mm and air content varying from 2.0%to 9.0%were prepared and the pumpability of MS SCC was studied by a sliding pipe rheometer(Sliper).According to the Kaplan’s model,the initial pump pressure and the pump resistance of MS SCC were obtained.Meanwhile,rheological properties including the yield stress and the plastic viscosity of MS SCC were measured by a rheometer.The experimental results show that the increase of slump flow contributes to a higher pumpability and a proper air content,i e,6%is beneficial for the pumpability of MS SCC.Due to the existence of stone powder and stronger angularity of MS,the initial pump pressure of MS SCC is only about 60%-88%that of river sand(RS)SCC with the same slump flow and air content,indicating that MS SCC possesses a higher pumpability than RS SCC.

关 键 词：manufactured sand self-compacting concrete PUMPABILITY sliding pipe rheometer RHEOLOGY 

分 类 号：U214.18[交通运输工程—道路与铁道工程]