酸雨对再生骨料混凝土实心砖砌体抗压性能影响试验研究

发布时间：2018-07-02 21:17

本文选题：再生骨料混凝土实心砖砌体 + 酸雨腐蚀　；参考：《工程力学》2017年02期

【摘要】：为了研究酸雨腐蚀对再生骨料砖混凝土实心砖砌体抗压性能的影响,该文以32榀相同特性的再生骨料混凝土实心砖砌体抗压试件为研究对象,利用国内先进的人工模拟大气环境实验室,对其进行喷淋-光照循环加速腐蚀试验及轴心抗压试验,对比分析了试件抗压强度、破坏形态、弹性模量和应力-应变关系随腐蚀循环次数的变化。试验结果表明:经酸雨腐蚀后的再生骨料混凝土实心砖砌体开裂荷载较小,裂缝出现较早,破坏相对严重;随着腐蚀次数的增加,应力-应变曲线斜率逐渐减小,弹性模量逐渐降低,抗压强度呈先升后降的趋势。经300次酸雨腐蚀,抗压强度下降29%,弹性模量下降42%。
[Abstract]:In order to study the effect of acid rain corrosion on compressive performance of recycled aggregate brick concrete solid brick masonry, 32 specimens of recycled aggregate concrete solid brick masonry with the same characteristics were studied in this paper. In this paper, the advanced laboratory of artificial simulated atmospheric environment is used to carry out the accelerated corrosion test and axial compression test of spray-light cycle, and the compressive strength and failure pattern of the specimen are compared and analyzed. The relationship between elastic modulus and stress-strain varies with the number of corrosion cycles. The test results show that the cracking load of recycled aggregate concrete solid brick masonry after acid rain corrosion is small, the cracks appear earlier and the damage is relatively serious, and the slope of stress-strain curve decreases gradually with the increase of corrosion times. The elastic modulus decreases gradually, and the compressive strength increases first and then decreases. After 300 times of acid rain corrosion, the compressive strength and elastic modulus decreased by 29% and 42% respectively.
【作者单位】：西安建筑科技大学土木工程学院;
【基金】：国家科技支撑计划项目(2013BAJ08B03) 教育部高等学校博士学科点专项科研基金项目(20136120110003) 陕西省科研项目(2013JC16)
【分类号】：TU522

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