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李国荣¹  ,  刘玉芝²

( 1 .  杨凌职业技术学院 ，杨凌 712100 ;  2.  杨凌工业园区投资创业服务有限公司 ，杨凌 712100)

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 302.9kg/cm3 、 1  276. 6 N  ·m/kg 、0. 079 1 W/m ·k 、0. 128 MPa 和 2. 93 mm/m。

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

中图分类号：TU528           

文献标志码：A            

文章编号： 1005- 8249   (2025)  01- 0029- 05 

DOI:10. 19860/j.cnki.issn1005 - 8249.2025 .01 .006

 

LI Guorong¹  ,  LIU Yuzhi²

( 1 . Yangling Voactional & Technical College ,  Yangling 712100 ,  China;

2. Yangling Industrial Park Investment Venture Service Co. ，Ltd. ，Yangling 712100 ,  China)

Abstract: 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 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, but it will also 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/cm3, 1276.6 N * m/kg, 0.0791 W/m * k, 0.128 MPa and 2.93 mm/m.

Key words: ultralight foam concrete; high belite sulphoaluminate cement; fly ash; Substitution rate

作者简介： 李国荣  (1984—) ,  男 ，硕士， 副教授 ，研究方向 ：结构工程。

收稿日期：2023 - 02 - 06