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不同预处理方式的半干法脱硫灰对蒸压加气混凝土性能的影响
作者：曹宇1，董庆广2，陈宁2，王娟2，周志云1
（1.上海理工大学 环境与建筑学院，上海 200093；2.上海市建筑科学研究院有限公司，上海 200003）
摘要：研究了不同预处理方式的半干法脱硫灰对制备的加气混凝土性能和微观结构的影响。结果表明，半干法脱硫灰在低温潮湿环境下生成了碳硫硅钙石，该物质会在制备加气混凝土时降低其抗压强度；采用加水消化后的半干法脱硫灰提高了加气混凝土的抗压强度，降低其绝干密度；采用球磨磨细后的半干法脱硫灰提高了加气混凝土的抗压强度，降低其绝干密度，并减少了化学组分中CaSO4的含量，使托贝莫来石的结晶度提高，空间分布更加紧密。
关键词：半干法脱硫灰；预处理；蒸压加气混凝土；抗压强度；绝干密度
中图分类号：TU528.2 文献标识码：A 文章编号：1001-702X（2022）02-0115-05
Effect of semi dry FGD ash with different pretreatment methods on properties of autoclaved aerated concrete
CAO Yu1，DONG Qingguang2，CHEN Ning2，WANG Juan2，ZHOU Zhiyun1
（1.School of Environment and Architecture，University of Shanghai for Science and Technology，Shanghai 200093，China；
2.Shanghai Academy of Building Science Co. Ltd.，Shanghai 200003，China）
Abstract：The effects of semi dry desulfurization ash after different pretreatment methods on the properties and microstructure of aerated concrete were studied. The results show that after being stored in low temperature and humid environment，the semi dry FGD ash will produce carbon sulfur wollastonite，which will reduce its compressive strength when preparing aerated concrete. Using semi dry FGD ash digested by water to prepare aerated concrete will improve the compressive strength of aerated concrete and reduce its absolute dry density. The preparation of aerated concrete with ball milled semi dry desulfurization ash will improve the compressive strength of aerated concrete，reduce its absolute dry density，reduce the content of CaSO4，improve the crystallinity of tobermorite and make the spatial distribution more compact.
Key words：semi dry desulfurization ash，pretreatment，autoclaved aerated concrete，compressive strength，absolute dry density