废弃混凝土破碎细颗粒在加气混凝土中的应用研究
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（1 浙江工业大学工程设计集团有限公司，杭州 310014； 2 杭州市交通运输发展服务中心，杭州 310014； 3 浙江工业大学建筑工程学院，杭州 310014）
［摘要］采用废弃混凝土破碎细颗粒取代部分石英砂，用于生产加气混凝土。研究了破碎细颗粒掺量对加气混凝土料浆稠度和蒸压养护后的加气混凝土抗压强度和干密度的影响。结果表明，破碎细颗粒掺量低于10%时，有助于提高料浆的流动性，但随着掺量的继续增大，料浆流动性迅速下降；在浆料扩展度相近的条件下，随破碎细颗粒掺量的增大，需水量增大，对减小加气混凝土的干密度有利，但蒸压养护后，加气混凝土的抗压强度呈先增大后减小趋势。［关键词］废弃混凝土; 破碎细颗粒; 加气混凝土中图分类号：TU528 文献标识码：A 文章编号：1002-848X(2016)06-0091-04
Application study on crushed fine particles of waste concrete in autoclaved aerated concreteShan Yuchuan1, Zhang Xuefeng1, Liu Zhouzhou2, Wen Xingshui2, Kong Deyu3（1 Zhejiang University of Technology Engineering Design Group Co., Ltd., Hangzhou 310014, China; 2 Hangzhou Transportation Development Service Center, Hangzhou 310014, China; 3 College of Civil Engineering and Architecture, Zhejiang University of Technology, Hangzhou 310014, China）Abstract: The crushed fine particles of waste concrete were adopted to replace some quartz sands as raw materials in the production of the autoclaved aerated concrete. The effect of additive amount of the crushed fine particles on slurry consistency and the compressive strength and dry density of the autoclaved aerated concrete after autoclaved curing was studied. The results show that if addtive amount of the crushed fine particles is lower than 10%, the fluidity of the slurry is improved, but the fluidity of the slurry drops sharply with increase of additive amount. Under the condition that the slurry shows nearly the same flow value, the water requirement increases with the increase of additive amount of the crushed fine particles, which benefits reducing the dry density of autoclaved aerated concrete. However, after autoclaved curing, compressive strength of the autoclaved aerated concrete shows the trend of improvement first and then decrease.Keywords: waste concrete; crushed fine particle; autoclaved aerated concrete
通讯作者：章雪峰，高级工程师，一级注册结构工程师，Email：12639404@qq.com。
