热活化盾构渣土基陶粒的制备及机理研究  

Preparation and Mechanism of Thermal Activation Shield Muck-Based Ceramsite

作　　者：张秀泽 黄敏[1,2] 黄慕洋[1,3] 黎梦珂 葛楚怡 廖先清 包申旭[1,3] ZHANG Xiuze;HUANG Min;HUANG Muyang;LI Mengke;GE Chuyi;LIAO Xianqing;BAO Shenxu(School of Resources and Environmental Engineering,Wuhan University of Technology,Wuhan 430070,China;Institute of Agricultural Quality Standards and Testing Technology Research,Hubei Academy of Agricultural Sciences,Wuhan 430064,China;Key Laboratory of Green Utilization of Critical Non-metallic Mineral Resources,Ministry of Education,Wuhan University of Technology,Wuhan 430070,China)

机构地区：[1]武汉理工大学资源与环境工程学院,武汉430070 [2]湖北省农业科学院农业质量标准与检测技术研究所,武汉430064 [3]武汉理工大学关键非金属矿产资源绿色利用教育部重点实验室,武汉430070

出　　处：《硅酸盐通报》2025年第4期1556-1565,共10页Bulletin of the Chinese Ceramic Society

基　　金：湖北省重点研发项目资助(2022BAA029)。

摘　　要：盾构渣土(SM)活性低、处理难度大,传统“预烧-烧结”制备烧结陶粒的工艺流程复杂、变温频繁、生产效率低。本文采用热活化和NaOH-水玻璃激发的联合工艺,利用热活化盾构渣土(BSM)和高炉矿渣(GGBFS)制备陶粒,探究热活化温度、原料配比、热活化时间和养护时间对陶粒物理性能的影响。结果表明:热活化温度为1000℃、m(SM/BSM)∶m(GGBFS)为6∶4、热活化时间为0.5 h、养护时间为28 d时制备的陶粒性能优异,28 d抗压强度达10.38 MPa,颗粒密度为1.90 g·cm^(-3),堆积密度为895 kg·m^(-3),吸水率为5.69%。微观形貌分析表明,陶粒内部水化反应产生了水化硅酸钙(C-S-H)和钠(钙)铝硅酸盐水合物(N(C)-A-S-H)复合凝胶,封闭大部分孔隙,使晶粒间紧密结合,从而提升了陶粒的抗压强度。本研究可优化盾构渣土基陶粒的制备工艺,提高实际生产效率。Shield muck(SM)is characterized by low activation and challenging disposal.The conventional‘pre-firing-sintering’process for preparing ceramsites is complex,the temperature changes frequently,and the production is low.In this paper,the combined process of thermal activation and NaOH-waterglass activation was used to prepare ceramsites from burning shield muck(BSM)and ground granulated blast furnace slag(GGBFS).The effects of thermal activated temperatures,material ratios,thermal activated time,and curing time on the physical properties of ceramsites were investigated in detail.The results show that when the thermal activation temperature is 1000℃,m(SM/BSM)∶m(GGBFS)is 6∶4,the thermal activation time is 0.5 h,and the curing time is 28 d,the performance of the prepared ceramsite is excellent.The 28 d compressive strength of ceramsite is 10.38 MPa,the particle density is 1.90 g·cm^(-3),the bulk density is 895 kg·m^(-3),and the water absorption is 5.69%.The results of micromorphology analysis show that the hydration reaction inside the ceramsites produced calcium silicate hydrate(C-S-H)and sodium(calcium)silicaluminate hydrate(N(C)-A-S-H)composite gel,which closed most of the pores and made the grains closely bonded,thus improving the compressive strength of the ceramsites.This study can optimize the preparation technology of shield muck-based ceramsites,improving the efficiency of industrial production.

关 键 词：陶粒 盾构渣土 热活化 碱激发 

分 类 号：X705[环境科学与工程—环境工程]