焚烧飞灰火山灰活性测试及评价方法研究
Pozzolanic Activity Test and Evaluation Method of MSWIFA
陈佳庆 1陈萍 1谢育朦 1王寅 1王子昂 2詹良通2
作者信息
- 1. 浙江理工大学建筑工程学院,杭州 310018
- 2. 浙江大学建筑工程学院,杭州 310058
- 折叠
摘要
生活垃圾焚烧飞灰的资源化利用正受到关注,火山灰活性是其应用的重要性能,但目前缺乏可靠的火山灰活化评价方法.鉴于粉煤灰与焚烧飞灰均是焚烧产物,借鉴现有粉煤灰的火山灰活性评价方法,从物质组成(成分结构分析法)、胶凝性能(强度指数法)和化学反应(结合水含量法)三个角度对两种焚烧飞灰(炉排炉、流化床)进行火山灰活性测试和分析,同时与三个等级粉煤灰的测试结果进行对比.结果表明:成分结构分析法和强度指数法均可用于评价焚烧飞灰的火山灰活性,而结合水含量法不适用;非晶相硅铝含量可以作为火山灰活性的表征指标,与强度指数具有一定相关性;强度指数法测试结果受非晶相硅铝与钙相对含量的影响,对于焚烧飞灰,14 d胶砂强度指数即可反映其火山灰活性,而对于粉煤灰,需要考虑采用90 d甚至更长龄期的强度指数来进行评价.
Abstract
Resource utilization of municipal solid waste incineration fly ash(MSWIFA)is attracting attention,and the pozzolanic activity of MSWIFA is an important property for its utilization.However,there has yet no reliable evaluating methods.Given that fly ash and MSWIFA are both incineration products,borrowing the existing pozzolanic activity methods of fly ash,two types of MSWIFA(from grate furnace and fluidized bed)were tested and analysized by pozzolanic activity test from three perspectives,such as material composition(composition structure analysis method),cementation properties(strength activity index method)and chemical reaction(combined water content method),and compared with the test results of three grades of fly ash.The results show that the composition structure analysis method and strength activity index method are suitable for evaluating pozzolanic activity of MSWIFA,and the combined water content method is not suitable.The amorphous phase silica-alumina content can characterize pozzolanic activity of MSWIFA and correlated with strength activity index.The results of strength activity index method are affected by relation content of amorphous phase silica-alumina content and calcium.The strength activity index of 14 d can characterize pozzolanic activity of MSWIFA,the strength activity index of 90 d or even more curing ages can better characterize pozzolanic activity of fly ash.
关键词
焚烧飞灰/火山灰活性/非晶相硅铝含量/成分结构分析法/强度指数法/结合水含量法Key words
MSWIFA/pozzolanic activity/amorphous phase silica-alumina content/composition structure analysis method/strength activity index method/combined water content method引用本文复制引用
基金项目
国家自然科学基金面上项目(42377173)
国家自然科学基金面上项目(41977250)
浙江省双边产业联合计划(2023C04033)
出版年
2024
国家科技期刊平台
NSTL
维普
万方数据