Effect of Mechanism Sand of Skarn Tailings on Concrete Performance
The siliceous manufactured sand was prepared from the waste rock of skarn tailings in Laiyuan area.The lithofacies and mineral composition of tailings waste rock parent rock were analyzed,and the main performance indexes of the manufactured sand and the main components of the stone powder were determined.Compared with the limestone manufactured sand,the effects of the flake particle content and the stone powder content of the manufactured sand on the working performance,mechanical properties and durability of concrete were studied.The results show that:The increase of flake particles and powder content reduces the workability and strength of the skarn manufactured sand concrete and the limestone manufactured sand concrete.Compared with limestone machine-made sand,when the flaky particles are the same,the strength of skarn machine-made sand concrete is higher.When the powder content is less than 8%,the strength of the skarn manufactured sand concrete is higher.For the C30 skarn manufactured sand concrete,the increase of flake particles content will deteriorate the durability of the concrete,but a certain amount of powder has a certain improvement effect on the impermeability,frost resistance and chloride ion permeability resistance.
skarnmanufactured sandflake particlesstone powder contentperformance of concrete
NETL
NSTL
万方数据
维普
