摘要 为实现将粉煤灰与电石渣两种固体废弃物协同处理的目的,将二者混合后掺入高水充填材料中,研究粉煤灰与电石渣的不同配合比对高水充填材料物理力学性能的影响。将电石渣作为粉煤灰的碱激发剂,以激发粉煤灰的火山灰特性。试验结果表明:粉煤灰掺量相同时,随着电石渣掺量的增加,高水充填材料的凝结时间延长,干容重和湿容重都出现先增加后减小的现象,而含水率刚好相反。高水充填材料的峰值强度呈现先增后减的变化趋势。粉煤灰掺量为20%,电石渣含量占粉煤灰5%为最优掺量,所得的改性高水充填材料在物理及力学参数上与纯高水充填材料十分接近,不仅提高了高水充填材料的经济性,也丰富了粉煤灰与电石渣的利用途径。 Aiming at achieving the purpose of synergistic treatment of two solid wastes:fly ash and calcium carbide slag,the mixture of fly ash and cal-cium carbide slag was mixed into high water filling materials to study the effect of different mixture ratio of fly ash and calciumc arbide slag on the physical and mechanical properties of high water filling material.Calcium carbide slag was used as alkali activator of fly ash to stimulate pozzolanic characteristics of fly ash.The test results show that:under the same fly ash content,with the increase of calcium carbide slag content,the setting time of the high water filling material is prolonged,the dry and wet bulk density increase first and then decrease,while the water content is just opposite.The peak strength of high water filling materials increases first and then decrease.According to the analysis,the optimal content of fly ash is 20%,and the optimal content of carbide slag in fly ash is 5%.The physical and mechanical parameters of the modified high water filling material are very close to that of pure high water filling material,which not only improves the economy of high water filling material,but also enriches the utilization way of fly ash and carbide slag.
出处 《材料导报》 EI CAS CSCD 北大核心 2021年第7期7027-7032,共6页 Materials Reports
