Preparation of sintered foam materials by alkali-activated coal fly ash.
Coal fly ash from coal fired power stations is a potential raw material for the production of ceramic tiles, bricks and blocks. Previous works have demonstrated that coal fly ash consists mainly of glassy spheres that are relatively resistant to reaction. An objective of this research was to investigate the effect of alkali on the preparation process of the foam material. Moreover, the influence of foam dosage on the water absorption, apparent density and compressive strength was evaluated. The experimental results showed that homogenous microstructures of interconnected pores could be obtained by adding 13 wt.% foaming agent at 1050 degrees C, leading to foams presenting water absorption, apparent density and compressive strength values of about 126.5%, 0.414 g/cm(3), 6.76 MPa, respectively.
State Key Laboratory of Fine Chemicals and School of Chemical Engineering, Dalian University of Technology, 158 Zhongshan Road, Dalian 116012, PR China.
Yelong
Y
Zhao
Junwei
J
Ye
Xiaobin
X
Lu
Mangang
M
Liu
Yuan
Y
Lin
Weitao
W
Gong
Guiling
G
Ning
D002244:Carbon; D003031:Coal; D060729:Coal Ash; D008855:Microscopy, Electron, Scanning; D052638:Particulate Matter; D014961:X-Ray Diffraction
D003031:Coal; D060729:Coal Ash; D052638:Particulate Matter; D002244:Carbon