橡胶集料自密实混凝土的抗硫酸盐侵蚀性能

发布时间：2018-02-03 04:51

本文关键词： 橡胶集料自密实混凝土硫酸盐侵蚀相对动弹模量质量损失率抗压强度耐蚀系数　出处：《建筑材料学报》2017年03期 　论文类型：期刊论文

【摘要】：采用干湿循环硫酸盐侵蚀试验方法,研究了橡胶集料自密实混凝土(RSCC)的相对动弹模量、质量损失率及抗压强度耐蚀系数的变化规律.结果表明:RSCC的相对动弹模量和抗压强度耐蚀系数随着干湿循环次数的增加先增大后减小,当水胶比相同时,试验结束时(经历150次干湿循环后)两者随着橡胶颗粒取代量(以砂体积计)的增加而减小,当强度等级相同时,试验结束时两者随着橡胶颗粒取代量的增加而增大;RSCC的质量损失率在干湿循环初期迅速增大,之后慢速增加,当水胶比相同时,试验结束时RSCC质量损失率随着橡胶颗粒取代量的增加而增大,当强度等级相同时,试验结束时RSCC质量损失率随着橡胶颗粒取代量的增加而减小,当橡胶颗粒取代量为10%时,RSCC的综合性能较为理想.改进的两阶段、三区域RSCC抗压强度耐蚀系数预测模型能够有效体现RSCC的抗压强度耐蚀系数与橡胶颗粒取代量之间的关系.
[Abstract]:By the dry wet circulation, sulfate corrosion test method, rubber aggregates self compacting concrete (RSCC) on the relative dynamic elastic modulus variation, the mass loss rate and corrosion resistance coefficient of compressive strength. The results show that the RSCC of the relative dynamic elastic modulus and compressive strength corrosion resistance coefficient increased with dry wet cycles increases and then decreases when the ratio of phase at the same time water glue, at the end of the experiment (150 times after dry wet cycles) with two rubber particles substitution amount (in sand volume) decreased, when the same strength grade, at the end of the experiment, both with the increase of rubber particle content increasing; the quality loss rate of RSCC increased rapidly in the early dry wet cycle after a slow increase, when the water cement ratio is same, at the end of the experiment, the mass loss rate of RSCC increases with the substitution amount of rubber particles, when the same strength grade, the test at the end of RSCC mass loss The rate decreases with the increase of rubber content, when the rubber particles replace quantity is 10%, the comprehensive performance of RSCC is better. The two stage improved prediction model can effectively reflect the relationship, corrosion resistance coefficient of compressive strength and the rubber particles of RSCC substitution amount between three RSCC compressive strength corrosion resistance coefficient.

【作者单位】：西安建筑科技大学土木工程学院;中南大学土木工程学院;宁波大学建筑工程与环境学院;
【基金】：国家自然科学基金资助项目(51590914,51608432) 中国博士后科学基金面上项目(2015M580822) 宁波市自然科学基金资助项目(2015A610300)
【分类号】：TU528
【正文快照】： 橡胶制品具有不溶于水、难溶于有机物和不易腐烂等特点,因此,橡胶轮胎的废弃、堆积对环境造成了巨大的污染[1].将废旧轮胎粉碎成橡胶颗粒后掺入混凝土中制备得到的橡胶混凝土,是一种具有较好抗冲击性能、阻尼性能和疲劳性能的弹性混凝土,在工程中得到了一定应用,并取得了较好

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