摘要
可控性低强度材料(CLSM)是一种替代传统的回填材料,具有低强度、自流平、自我填充与自密实的特性,并在欧美地区得到广泛应用的一种材料。为了加强对可控低强度材料的研究,提出了以电石渣、钢渣、煤矸石为主要原料制备可控低强度材料,研究其不同温度、不同原料配比条件对其抗压强度的影响,通过X射线衍射分析了其物质发生的化学变化及变化规律。电石渣和钢渣的比例在1∶1附近时抗压强度达到最大,温度升高和氯化钙加入量的增加也有利于抗压强度的提高,氧化钙、二氧化硅等部分原料转变为复合硅酸盐晶体。
The controlled low-strength material（ CLSM）,an alternative traditional backfill material having the characteristics of low strength,self-leveling,self-filling and self-compacting,is widely used in Europe and America. For further study on CLSM,steel slag,carbide slag,and coal gangue were used as the main materials to prepare CLSM,and the influences of temperature and mass ratio of raw materials on unconfined compressive strength were studied. Related chemical reaction mechanisms were further discussed based on the X-ray diffraction phase identification of various final products. Results show that the optimal technical condition is observed at the 1 ∶ 1 ratio of steel slag to carbide slag. Unconfined compressive strength is enhanced by higher temperatures and increased dosage of calcium chloride. Moreover,a small portion of raw materials are transformed into silicate crystals.
出处
《环境工程学报》
CAS
CSCD
北大核心
2016年第4期1967-1972,共6页
Chinese Journal of Environmental Engineering
基金
同济大学污染控制与资源化国家重点实验室自主课题(PCRRK14001)
国家自然科学基金资助项目(51278350)
国家环境保护公益性行业科研专项(201309025)
关键词
可控性低强度材料
无侧限抗压强度
钢渣
电石渣
煤矸石
controlled low strength material
unconfined compressive strength
steel slag
carbide slag
coal gangue
