摘要
文中以03省道复线高架南延工程为依托,进行了机制砂替代河砂的高性能混凝土应用研究工作,试验采用细度模数、石粉含量不同的7种机制砂进行C30混凝土试配,并选取混凝土工作性能较好的样品5机制砂配置了C35混凝土。试验结果表明:当石粉含量在6.0%~7.0%时,混凝土的包裹性、保水性良好。当石粉含量小于6.0时,混凝土的包裹性和保水性较差,增加砂率并不能有效改善混凝土的包裹性和保水性。当石粉含量为11.8%和12.3%时,混凝土包裹性良好,但是保水性较差。用机制砂配置的混凝土强度整体优于河砂配置的混凝土强度。
Based on the South extension project of 03 provincial highway double track viaduct, this paper studies the application of manufactured sand instead of river sand in high performance concrete. Seven kinds of manufactured sand with different fineness modulus and stone powder content are used to pour C30 concrete, and the sample 5 manufactured sand with better working performance is selected to pour C35 concrete. The test results show that when the content of stone powder is 6.0% ~ 7.0%, the wrapping and water retention of concrete are good. When the stone powder content less than 6.0, the encapsulation and water retention of concrete are poor, and increasing the sand rate cannot effectively improve the encapsulation and water retention of concrete. When the content of concrete is 11.8%, the water retention is poor. The strength of concrete with machine-made sand is better than that with river sand.
作者
巫亚明
张正伟
Wu Yaming;Zhang Zhengwei(Jiangsu Transportation Engineering Group Co.Ltd.,Zhenjiang,Jiangsu 212100)
出处
《江西建材》
2021年第3期29-31,共3页
Jiangxi Building Materials
关键词
机制砂
混凝土
石粉含量
工作性能
力学性能
Machine-made sand
Concrete
Stone powder content
Working performance
Mechanical properties
