碳化条件下循环流化床粉煤灰的水化性能  

Hydration Properties of Circulating Fluidized Bed Fly Ash under Carbonation Condition

作　　者：刘洋 李驰[1,2,3] 高瑜[1,2,3] 李拴虎 LIU Yang;LI Chi;GAO Yu;LI Shuanhu(College of Civil Engineering,Inner Mongolia University of Technology,Hohhot 010051,China;Inner Mongolia Engineering Research Center of Geological Technology and Geotechnical Engineering,Inner Mongolia University of Technology,Hohhot 010051,China;Key Laboratory of Geological Hazards and Geotechnical Engineering Defense in Sandy and Drought Regions at Universities of Inner Mongolia Autonomous Region,Inner Mongolia University of Technology,Hohhot 010051,China)

机构地区：[1]内蒙古工业大学土木工程学院,内蒙古呼和浩特010051 [2]内蒙古工业大学地质技术与岩土工程内蒙古自治区工程研究中心,内蒙古呼和浩特010051 [3]内蒙古工业大学沙旱区地质灾害与岩土工程防御自治区高等学校重点实验室,内蒙古呼和浩特010051

出　　处：《建筑材料学报》2024年第9期837-845,共9页Journal of Building Materials

基　　金：国家自然科学基金资助项目(12262031,52378348);内蒙古自治区科技计划项目(2021GG0344);内蒙古自治区自然科学基金青年基金资助项目(2023QN04016)。

摘　　要：以固废——循环流化床粉煤灰和脱硫石膏为矿物掺合料制备砂浆,通过碳化试验、强度试验以及X射线衍射仪、扫描电镜-能谱等微观测试手段,探究了砂浆在碳化条件下的固碳能力、力学性能和反应机理.结果表明:固废的掺入增加了浆体孔隙,提高了钙源含量,使砂浆的CO_(2)吸收量显著提高;碳化养护后砂浆的力学性能显著提高,消除了高硫带来的膨胀问题;应用该工艺可将内蒙古地区工业固废利用率提高至36.5%.Mortars were prepared using solid waste—circulating fluidized bed fly ash and flue gas desulphurisation gypsum as mineral admixtures.The carbon sequestration capacity,mechanical properties and reaction mechanism of mortars under carbonation conditions were investigated through carbonation tests,strength tests,X-ray diffraction and scanning electron microscopy-energy spectroscopy.The results show that the incorporation of solid waste increases the pore space and the content of calcium source,and significantly improves the CO_(2)absorption of the mortars.Furthermore,the mechanical properties of the mortars are significantly improved after carbonation and maintenance,and the expansion problem caused by high sulphur is eliminated.The application of this process can increase the utilisation rate of industrial solid waste in Inner Mongolia region by up to 36.5%.

关 键 词：循环流化床 粉煤灰 碳化 CO_(2)吸收量 资源化利用 

分 类 号：TU528.09[建筑科学—建筑技术科学] X773[环境科学与工程—环境工程]