煤矸石混凝土抗硫酸盐侵蚀试验研究

发布时间：2017-12-31 16:21

  本文关键词：煤矸石混凝土抗硫酸盐侵蚀试验研究　出处：《非金属矿》2016年01期 　论文类型：期刊论文

  更多相关文章： 煤矸石混凝土 抗硫酸盐侵蚀 干湿循环 抗压强度

【摘要】：针对煤矸石混凝土结构耐久性问题,制作煤矸石混凝土立方体试件,进行抗硫酸盐侵蚀试验,研究了粉煤灰掺量、水胶比和干湿循环次数对煤矸石混凝土耐久性的影响。结果表明:煤矸石混凝土抗压强度随干湿循环次数增加呈先升高后降低的趋势;干湿循环15次时,煤矸石混凝土抗压强度耐蚀系数与粉煤灰掺量呈负相关,与水胶比关系不大;干湿循环大于30次时,煤矸石混凝土抗压强度耐蚀系数与粉煤灰掺量呈正相关,与水胶比呈负相关,相关显著性强弱表现为干湿循环90次干湿循环60次干湿循环30次。煤矸石混凝土抗硫酸盐侵蚀能力能满足一般建筑物要求,这为煤矸石混凝土应用提供了试验依据。
[Abstract]:Aiming at the durability problem of coal gangue concrete structure, the cubic specimen of coal gangue concrete was made, the sulfate corrosion resistance test was carried out, and the amount of fly ash was studied. The effect of water-binder ratio and dry-wet cycle times on the durability of coal gangue concrete. The results show that the compressive strength of coal gangue concrete increases first and then decreases with the increase of dry and wet cycles. When dry and wet cycles are 15 times, the corrosion resistance coefficient of coal gangue concrete compressive strength is negatively related to the content of fly ash, but not related to the ratio of water to binder. When the dry and wet cycles are more than 30 times, the corrosion resistance coefficient of coal gangue concrete compressive strength is positively correlated with the content of fly ash, and negatively correlated with the water-binder ratio. The correlation significant performance is 90 times dry and wet cycle 60 times dry and wet cycle 30 times. Coal gangue concrete sulfate corrosion resistance ability can meet the general building requirements. This provides the test basis for the application of coal gangue concrete.
【作者单位】： 辽宁工程技术大学土木与交通学院;
【基金】：国家自然科学基金(51008148、51274111) 辽宁省教育厅基金(L2013137)
【分类号】：TU528;TD849.5
【正文快照】： 阜新市作为较早的煤炭生产基地,开采历史久,矸石存量大,废弃矸石于露天条件下堆存形成“矸石山”,不仅占据农田,且自燃时会产生大量CO、SO2和氮氧化物等有害气体[1-4]。在混凝土生产过程中,采用自燃煤矸石替代碎石制备自燃煤矸石混凝土,是解决资源浪费和环境污染的一条重要途，

本文编号：1360530