赤泥-石膏复合激发蒸压加气混凝土的制备与性能研究  

Preparation and Properties of Autoclaved Aerated Concrete with Red Mud-Gypsum Composite Excitation

作　　者：黄利祥 刘泽[1] 原航 王栋民[1] 危鹏 姜宏健 HUANG Lixiang;LIU Ze;YUAN Hang;WANG Dongmin;WEI Peng;JIANG Hongjian(School of Chemical and Environmental Engineering,China University of Mining and Technology(Beijing),Beijing 100083,China;Shanghai Baiaoheng New Materials Co.,Ltd.,Shanghai 200042,China)

机构地区：[1]中国矿业大学(北京)化学与环境工程学院,北京100083 [2]上海百奥恒新材料有限公司,上海200042

出　　处：《硅酸盐通报》2023年第4期1393-1399,1427,共8页Bulletin of the Chinese Ceramic Society

基　　金：国家自然科学基金联合基金(U20A20324);宁夏回族自治区重点研发计划(2021BEG92002)。

摘　　要：利用赤泥-石膏复合激发矿粉、粉煤灰制备蒸压加气混凝土,对促进赤泥资源化利用,降低硅酸盐水泥消耗以及实现二氧化碳减排具有重要意义。本文以强度级别A3.5、密度级别B06的蒸压加气混凝土为设计目标,分析了赤泥、石膏、矿粉以及生石灰掺量对蒸压加气混凝土抗压强度的影响。结果表明,当m(粉煤灰)∶m(赤泥)∶m(石膏)∶m(矿粉)∶m(生石灰)质量比为60∶10∶3∶7∶20时,蒸压加气混凝土试块的干密度为623.4 kg/m^(3),抗压强度为3.6 MPa。水化产物分析表明,蒸压加气混凝土试块在蒸压反应前水化产物主要为钙矾石,经过蒸压反应后水化产物主要为托勃莫来石和水石榴石。The autoclaved aerated concrete is prepared by using red mud-gypsum to excite blast furnace slag(BFS)and fly ash,which is of great significance to promote the resource utilization of red mud,reduce the consumption of Portland cement,and achieve CO_(2) reduction.The autoclaved aerated concrete with strength grade A3.5 and density grade B06 was taken as the design goal,and the influences of red mud,gypsum,BFS,and quicklime on the compressive strength of autoclaved aerated concrete were analyzed.The results show that when the mass ratio of fly ash,red mud,gypsum,BFS and quicklime is 60∶10∶3∶7∶20,the dry density and compressive strength of autoclaved aerated concrete are 623.4 kg/m^(3) and 3.6 MPa,respectively.The analysis of hydration products shows that the hydration product before autoclave reaction is mainly ettringite,and the hydration products after autoclaved reaction are tobermorite and katoite.

关 键 词：蒸压加气混凝土 赤泥 二氧化碳减排 抗压强度 干密度 水化产物 

分 类 号：TU528[建筑科学—建筑技术科学]