粉煤灰
硅酸盐水泥
抗压强度
材料科学
固化(化学)
水泥
碱金属
微观结构
氢氧化钙
氢氧化钠
硅粉
复合材料
化学工程
化学
有机化学
工程类
作者
Oscar Tarique,Maxim Kovtun
出处
期刊:Advances in Cement Research
[Thomas Telford Ltd.]
日期:2022-10-01
卷期号:34 (10): 458-471
被引量:1
标识
DOI:10.1680/jadcr.21.00144
摘要
Alkali-activated cements utilising fly ash can be a low-carbon alternative to Portland cement. However, fly ash alkali-activated cements require curing at elevated temperature and have cost plus environmental implications owing to the use of strong alkali solutions. Unclassified fly ash, silica fume, calcium hydroxide and sodium carbonate were used to develop novel one-part fly ash alkali-activated cements. When cured at ambient conditions, the cements gained compressive strength up to 11.0 and 44.2 MPa at 3 and 28 days, respectively. Microstructural investigations revealed that cation exchange reaction between the activators was the key element in the development of the microstructure and strength of the cements. The novel fly ash alkali-activated cements have at least 50% lower impact on global warming than highly blended Portland cements.
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