Experimental Study on the Performance of C30 Mechanized Sand Concrete with Vibration Mixing
In order to improve the application of machine-made sand concrete in engineering,experimental research on the performance of C30 ordinary concrete and machine-made sand concrete was conducted in this paper.Under the same ratio,machine made sand completely replaces natural river sand to prepare two types of concrete(made sand concrete with vibration mixing and made sand concrete with ordinary mixing).A comparative study was conducted on the working performance and compressive strength at 7d and 28d of made sand concrete and ordinary concrete.The experimental results show that with machine made sand completely replacing natural river sand,the working performance of ordinary sand concrete is better than that of machine made sand concrete.The working performance of sand concrete produced by vibration mixer is better than that of ordinary concrete.The compressive strength of sand concrete produced by vibration mixer at 7d and 28d is 2.5%and 1.7%higher than that of ordinary concrete,respectively,and the coefficient of variation is smaller.Moreover,the durability of sand concrete produced by vibration mixer is better,indicating that vibration mixing compensates for the defects of mechanical sand and improves its performance.
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