硅酸盐通报2024，Vol.43Issue(7)：2530-2538,9.
CFB灰渣混凝土的组成设计与应用研究
Composition Design and Application of CFB Ash-Slag Concrete
摘要
Abstract
With the large-scale application of clean combustion technology of circulation fluidized bed(CFB)boiler,the disposal CFB ash-slag has become an urgent problem to solve.CFB ash-slag concrete was prepared by using crushed stone as coarse aggregate,CFB slag as fine aggregate and CFB ash as mineral admixture.The effects of CFB slag sand rate and CFB ash content on workability and mechanical properties of CFB ash-slag concrete were discussed,and the mix proportion of CFB ash-slag concrete was optimized.The Cl-permeability resistance,freeze resistance and dry shrinkage of CFB ash-slag concrete and machine-made sand concrete were compared.The results show that compressive strength of CFB ash-slag concrete first increases and then decreases with the increase of CFB slag sand rate.With the increase of CFB ash content,the slump of CFB ash-slag concrete gradually decreases,and the compressive strength first increases and then decreases.The optimal mix proportion is cement 280 kg/m3,CFB ash 120 kg/m3,mineral powder 40 kg/m3,CFB slag 620 kg/m3,gravel 1 013 kg/m3,water 223 kg/m3,water reducing agent 8.8 kg/m3.Compared with machine-made sand concrete,CFB ash-slag concrete has better Cl-permeability resistance,freeze resistance and less drying shrinkage,and the small precast components prepared by CFB ash-slag concrete have better application effects in practical engineering.关键词
CFB灰渣/坍落度/抗压强度/耐久性/配合比/工程应用Key words
CFB ash-slag/slump/compressive strength/durability/mix proportion/engineering application分类
交通工程引用本文复制引用
李卫红,郭文斌,郭向兵,陈潇,周明凯..CFB灰渣混凝土的组成设计与应用研究[J].硅酸盐通报,2024,43(7):2530-2538,9.基金项目
国家自然科学基金(52272025) （52272025）
