摘要
为有效降低超轻泡沫混凝土的材料成本,采用Ⅰ级、Ⅱ级和Ⅲ级三种不同等级粉煤灰等量替代超轻泡沫混凝土中的高贝利特硫铝酸盐水泥,研究不同等级粉煤灰在不同取代率下的超轻泡沫混凝土物理力学性能。结果表明:掺入粉煤灰后可以进一步降低超轻泡沫混凝土的干密度和导热系数,起到良好的减重和隔热效果,但同时也会降低超轻泡沫混凝土的强度,增加收缩变形量;采用Ⅱ级粉煤灰、取代率为15%时,超轻泡沫混凝土的力学性能较佳,干密度、比强度、导热系数、拉伸黏结强度和28 d收缩值分别为302.9 kg/cm 3、1276.6 N·m/kg、0.0791 W/m·k、0.128 MPa和2.93 mm/m。
In order to effectively reduce the material cost of ultra light foam concrete,three different grades of fly ash,Grade Ⅰ,Grade Ⅱ and Grade Ⅲ,were used to replace the high belite sulphoaluminate cement in ultra light foam concrete equally,and the physical and mechanical properties of different grades of fly ash under different replacement rates of altra light foam concrete were tested.The results show that the addition of fly ash can further reduce the dry density and thermal conductivity of ultra light foam concrete,playing a good role in weight reduction and heat insulation,reduce the strength of ultra light foam concrete,while increasing the shrinkage deformation;When Grade II fly ash is used and the substitution rate is 15%,the mechanical properties of ultra light foam concrete are better,with dry density,specific strength,thermal conductivity,tensile bond strength and 28 day shrinkage values of 302.9 kg/cm 3,1276.6 N·m/kg,0.0791 W/m·k,0.128 MPa and 2.93 mm/m.
作者
李国荣
刘玉芝
LI Guorong;LIU Yuzhi(Yangling Voactional&Technical College,Yangling 712100,China;Yangling Industrial Park Investment Venture Service Co.,Ltd.,Yangling 712100,China)
出处
《粉煤灰综合利用》
2025年第1期29-33,共5页
Fly Ash Comprehensive Utilization
关键词
超轻泡沫混凝土
高贝利特硫铝酸盐水泥
粉煤灰
取代率
ultralight foam concrete
high belite sulphoaluminate cement
fly ash
substitution rate
