华南理工大学学报(自然科学版) ›› 2003, Vol. 31 ›› Issue (9): 57-61.

• 土木建筑工程 • 上一篇    下一篇

蒸养轻骨料—粉煤灰加气混凝土砌块结构与性能

吴笑梅 樊粤明   

  1. 华南理工大学 材料科学与工程学院‚广东 广州510640
  • 出版日期:2003-09-20 发布日期:2022-05-20
  • 作者简介:吴笑梅(1974—)‚女‚博士生‚讲师‚主要从事高 性能无机材料的研究.
  • 基金资助:
    广州市建委资助项目(9811) 

Structure and Performance of Steam-cured Fly-ash Aerated Concrete with Light Weight Aggregate

Wu Xiao-mei Fan Yue-ming   

  1. College of Material Science and Engineering‚South China Univ.of Tech.‚Guangzhou510640‚China
  • Online:2003-09-20 Published:2022-05-20

摘要: 采用 SEM、容重、强度、干缩和碳化等检测方法‚研究了添加轻骨料、微沫剂、发气 剂和微细集料等制成的蒸养轻骨料—粉煤灰加气混凝土砌块的结构与性能.研究结果表 明‚制品中气孔结构均匀、细化‚最大孔径小于0.6mm‚以0.2~0.5mm 为主;当轻骨料与 料浆的密度等级、体积比例、强度相互匹配时‚轻骨料均匀分布在料浆中‚并形成紧密的界 面结构;随着轻骨料体积分数由30%增至45%时‚制品干缩值明显减小‚碳化系数下降. 通过上述措施制成的制品在95℃养护1d 后‚其强度、干缩和碳化性能可达到蒸压加气 混凝土砌块国家标准 GB/T11968—1997的要求.

关键词: 蒸养, 轻骨料, 粉煤灰, 加气混凝土, 结构, 性能

Abstract: The structure and performance of steam-cured fly-ash aerated concrete with light weight aggregate prepared by adding light weight aggregate‚air-entraining agent and gas-forming agent‚finely ground aggregate were studied by SEM and other testing methods.The results show that the pore structure was improved.The aperture was less than0. 6mm‚and most of the pore size distributed in the range of0.2~0.5mm.When the density‚volume mixed ratio and strength of light weight aggregate and paste matched with each other‚light weight aggregate could disperse evenly in the sample and formed an intense boundary surface with the paste.As the volume fraction of light weight aggregate increased from 30% to 45%‚the dry shrinkage decreased significantly‚and the coefficient of carbonization lowed down.Performance such as compressive strength‚dry-shrin-kage and carbonization-resistance of the sample cured at 95℃ for one day could meet the requirements of standard GB/T11968—1997which is the standard of autoclaved aerated concrete. 

Key words: steam-cured, light weight aggregate, fly-ash, aerated concrete, structure, performance

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