碳化制度对加气混凝土性能及固碳量影响的研究  

Study on influence of carbonization system on performance and carbon fixation of aerated concrete

作　　者：张宾 谭新宇 周凤娇 王奕杰 陶从喜 邓恺 ZHANG Bin(China resources cement technology research and development CO.LTD.,Guangzhou 510460,Guangdong,China)

机构地区：[1]华润水泥技术研发有限公司,广东广州510460 [2]华润水泥技术研发(广西)有限公司,广西南宁530000

出　　处：《水泥》2024年第12期5-9,共5页Cement

摘　　要：采用二氧化碳养护的方式可以有效降低传统蒸压加气混凝土的碳排放并永久封存二氧化碳。以水泥、钢渣、尾矿等为原材料,通过二氧化碳养护,研究了碳化制度对加气混凝土性能及固碳量的影响。重点探究了碳化时间、碳化压力、二氧化碳浓度等对加气混凝土强度、干燥收缩、导热、固碳量等的影响。结果表明,碳化2 h内碳化时间对加气混凝土强度、固碳量的提高及干燥收缩的降低影响较大。当碳化压力低于0.5 MPa时,提高碳化压力有助于加气混凝土性能的提升,梯级碳化制度对加气混凝土性能的提高具有促进作用。当CO_(2)浓度高于75%时,CO_(2)浓度对加气混凝土性能和固碳量的影响不大。The use of carbon dioxide curing can effiectively reduce the carbon emissions of traditional autoclaved aerated concrete and permanently store carbon dioxide.This study used cement,steel slag,tailings and other raw materials,and studied the effect of carbonization system on the performance and carbon fixation of aerated concrete through carbon dioxide curing.The study focused on exploring the effiects of carbonation time,carbonation pressure,and carbon dioxide concentration on the strength,drying shrinkage,thermal conductivity,and carbon fixation of aerated concrete.The results showed that carbonation within 2 hours had a significant impact on improving the strength and carbon fixation of aerated concrete and reducing its drying shrinkage.When the carbonation pressure was lower than 0.5 MPa,increasing the carbonation pressure was beneficial to improve the performance of aerated concrete,and a stepwise carbonization system has a promoting effiect on improving the performance of aerated concrete.When the CO_(2) concentration was higher than 75%,the CO_(2) concentration had little effiect on the performance and carbon fixation of aerated concrete.

关 键 词：加气混凝土 二氧化碳 碳化制度 强度 固碳量 

分 类 号：TU528[建筑科学—建筑技术科学]