特细砂混凝土受压与受拉尺寸效应试验研究
Experimental Study on the Compression and Tensile Size Effect of Ultra-Fine Sand
DOI: 10.12677/hjce.2025.147187, PDF,    科研立项经费支持
作者: 崔 岩, 薛 宁：宁夏农垦建设有限公司，宁夏 银川；车佳玲：宁夏大学土木与水利工程学院，宁夏 银川
关键词: USC；超声波速；力学性能；尺寸效应；USC； Ultrasonic Wave Velocity； Mechanical Properties； Size Effect
摘要: 为实现特细砂混凝土(USC)的工程应用，研究了特细砂替代率与试件尺寸对USC超声波速、抗压强度及劈裂抗拉强度的影响，探究了USC受压与受拉尺寸换算系数的变化规律。结果表明：USC的超声波速均随特细砂替代率的增加而降低，特细砂替代率为20%时，边长100 mm和150 mm的USC在28 d时超声波速最高，分别达到3.92 km∙s−1和4.24 km∙s−1。随特细砂替代率的增加，USC的受压尺寸换算系数逐渐降低，受拉尺寸换算系数先降低后增加再降低。特细砂替代率达60%时，受压与受拉尺寸换算系数均最大程度偏离基准值1。
Abstract: In order to achieve the engineering application of ultra-fine sand concrete (USC), the influences of the substitution rate of ultra-fine sand and the size of specimens on the ultrasonic wave velocity, compressive strength and splitting tensile strength of USC were studied, and the variation law of the conversion coefficient between compressive and tensile dimensions of USC was explored. The results show that the ultrasonic wave velocities of USC decrease with the increase of the substitution rate of ultrafine sand. When the substitution rate of ultrafine sand is 20%, the ultrasonic wave velocities of USC with side lengths of 100 mm and 150 mm are the highest at 28 d, reaching 3.92 km∙s−1 and 4.24km∙s−1 respectively. With the increase of the substitution rate of ultrafine sand, the compression dimension conversion coefficient of USC gradually decreases, and the tensile dimension conversion coefficient first decreases, then increases, and then decreases again. When the substitution rate of ultrafine sand reaches 60%, the conversion coefficients of compressive and tensile dimensions deviate from the reference value by 1 to the greatest extent.
文章引用：崔岩, 薛宁, 车佳玲. 特细砂混凝土受压与受拉尺寸效应试验研究[J]. 土木工程, 2025, 14(7): 1736-1744. https://doi.org/10.12677/hjce.2025.147187

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