Properties of calcium enriched fly ash and its utilization in concrete

被引：0
|
作者：
Ma, X. [1 ]
Gong, Y. [1 ]
Gong, X. [2 ]
机构：
[1] Harbin Inst Technol, Harbin 150006, Heilongjiang, Peoples R China
[2] Harbin Honglin Supervis Co Ltd Civil Engn, Harbin, Heilongjiang, Peoples R China
来源：
SUSTAINABLE CONSTRUCTION MATERIALS AND TECHNOLOGIES | 2007年
关键词：
D O I：
暂无
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
Properties of Calcium enriched fly ash (CEFA) and its utilization is introduced in this paper. CEFA is combustion residue in electric power plants burning bituminous coal. The calcium is enriched intentionally by means of grinding limestone and coal powder together. CEFA is formed in the turbofurnace of the vertical cyclone boilers at the temperature of 1450 C to 1600 C. CEFA is characterized by higher calcium oxide and free lime lower ferric oxide, lower water requirement, and higher reactivity. Self-setting and self-hardening are the specific performance because of existence of lime, calcium silicates and calcium aluminates in it. In concrete mixture, the volume of fly ash can be as high as 20% to 70% of the binder. Concrete develops a satisfactory compressive strength when cement is partially replaced.
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页码：183 / +
页数：2
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