摘要
进行了一系列全机制砂C130混凝土配合比试验,结果发现在水胶比为0.19,配合比为水泥:矿渣粉:硅粉;微珠粉:水:外加剂:5-10石:10-15石:机制砂=469:105:56:70:133:22:460:434:773时,倒筒排空时间7s,扩展度710mm,3h扩展度无损失,最符合C130高层泵送高性能机制砂混凝土技术要求。经测试,所成型C130混凝土试块28d轴心抗压强度强度就已达到123.1MPa,静力受压弹性模量为52.1GPa,抗折强度达到15.2MPa。采用该配合比拌制的C130混凝土在广州市增城区某高层住宅的顶层成功泵送,泵送高度达220m,此次实践促进了C130机制砂高性能混凝土首次在实体工程中的应用,为机制砂高强混凝土在高层泵送中的应用提供了参考。
A series of fully mechanized sand C130 concrete mix ratio tests were conducted,and the results showed that at a water cement ratio of 0.19,the mix ratio was cement:slag powder:silicon powder;Micro bead powder:water:admixture:5-10 stone:10-15 stone:machine made sand=469:105:56:70:133:22:460:434:773,the emptying time of the inverted tube is 7 seconds,the expansion is 710mm,and there is no loss of expansion after 3 hours,which best meets the technical requirements of C130 high-rise pumping high-performance machine made sand concrete.After testing,the axial compressive strength of the formed C130 concrete specimen after 28 days has reached 123.1 MPa,the static compressive modulus of elasticity is 52.1 GPa,and the flexuralstrength has reached 15.2 MPa.The C130 concrete mixed with this mix ratio was successfully pumped on the top floor of a high-rise residential building in Zengcheng District,Guangzhou,with a pumping height of 220m.This practicepromoted the first application of C130 machine-made sand high-performanceconcrete in real projects,and provided a referencefor the applicationof machine-madesand high-strength concrete in high-rise pumping.
作者
贺慧
HE Hui(Guangzhou Xingye Concrete Mixing Limited Company,Guangzhou 510705)
出处
《广州建筑》
2023年第3期73-76,共4页
GUANGZHOU ARCHITECTURE
关键词
机制砂
C130
高性能混凝土
配合比
Machine-made sand
C130
High performanceconcrete
mix proportion
