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。
The sample of coal gangue concrete and the resistance to sulfate attack is made in order to study the durability of coal gangue concrete structure. The influence of fly ash content, water cement ratio and dry wet cycle times on the durability of coal gangue concrete is studied. The main conclusions are as follows： the compressive strength of coal gangue concrete increases first and then decreases with the increase of dry wet cycles. The compressive strength of coal gangue concrete is negatively correlated with the content of fly ash, and has little relationship with water cement ratio at 15 times of dry wet cycles. The compressive strength and corrosion resistance coefficient of coal gangue concrete is positively correlated with the content of fly ash and negatively correlated with water cement ratio when the dry wet cycle is more than 30 times. The performance of the correlation order was 90 times of dry wet cycle, 60 times, 30 times. The ability of resisting sulfate attack of coal gangue concrete can meet the requirements of the general building, which provides the experimental basis for the application of coal gangue concrete.
出处
《非金属矿》
CAS
CSCD
北大核心
2016年第1期8-10,共3页
Non-Metallic Mines
基金
国家自然科学基金(51008148
51274111)
辽宁省教育厅基金(L2013137)
关键词
煤矸石混凝土
抗硫酸盐侵蚀
干湿循环
抗压强度
coal gangue concrete
resistance to sulfate attack
dry wet cycle
compression strength
