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 4 5 %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/T1196 8— 1997的要求 .
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 than 0.6 mm, and most of the pore size distributed in the range of 0.2～0.5 mm. 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—1997 which is the standard of autoclaved aerated concrete.
出处
《华南理工大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2003年第9期57-61,共5页
Journal of South China University of Technology(Natural Science Edition)
基金
广州市建委资助项目 (9811)
关键词
蒸养
轻骨料
粉煤灰
加气混凝土
结构
性能
steam-cured
light weight aggregate
fly-ash
aerated concrete
structure
performance
