石炭系灰岩机制砂干混砂浆性能的试验研究

sed, and the shrinkage rate decreased.When the sand ratio is 1:6,the frost resistance does not meet the requirements;When the sand ratio is constant,with the increase of fly ash in place of cement, the frost resistance and shrinkage decrease,when the replacement rate is 10%, the antifreeze performance is the best,the shrinkage rate is only 1/3~1/2 of the blank sample when the replacement rate is 20%. РKEY WORDS:machine-made sand,dry-mixed mortar, fly ash,proportion of colloidal, mix proportion optimizationР目录Р第一章绪论?1Р1.1课题研究背景?1Р1.2干混砂浆与传统砂浆对比?1Р1.2.1传统砂浆的弊端与局限性?1Р1.2.2干混砂浆的优势?2Р1.3国内外研究现状?3Р1.3.1机制砂的研究现状?3Р1.3.2干混砂浆研究现状?5Р1.4干混砂浆的生产工艺流程?7Р1.5课题的意义?7Р1.6本文研究的内容和技术路线?8Р1.6.1研究的主要内容?8Р1.6.2研究的技术路线?9Р第二章试验材料及试验方法?10Р2.1原材料的性能及相关指标?10Р2.1.1母岩?10Р2.1.2机制砂?10Р2.1.3水泥?10Р2.1.4粉煤灰?10Р2.1.5 纤维素醚?11