Journal Published Online: 26 March 2019
Volume 48, Issue 4

Synthesis and Characterization of the Blast Furnace Cinder–Based Geopolymer-Solidified Pile Mud

CODEN: JTEVAB

Abstract

For evaluating the effect of the blast furnace cinder–based geopolymer solidified pile mud, the relationship of the solidified blocks between the compressive strength and the n(silicon):n(aluminum) (n[Si]:n[Al]), n(sodium):n(aluminum) (n[Na]:n[Al]) and n(water):n(binder) are fitted using the Box–Behnken experimental design, and the optimal values of the solidified block are selected. The mineral compositions, microstructure, and pore structure are determined through X-ray analysis, micromorphology, and static equilibrium adsorption test, respectively. Based on these experiments, the following conclusions are presented. The response surface model can well evaluate the relationship between the compressive strength and multiple factors. The theoretical maximum strength of the block is 1.90 MPa when the n(Si):n(Al), n(Na):n(Al), and n(water):n(binder) are 2.873, 0.706, and 2.329, respectively. The compressive properties of the blocks meet the requirements of the China Standards JTG E30-2005, Test Method of Cement and Concrete for Highway Engineering. Zeolite A, kröhnkite, rankinite, sidorenkite, and berthierite are formed through geopolymerization. The dense lamellar particles have disappeared into the microstructure, and the amorphous substances are clearly observed. The isotherms of the pile mud and the solidified blocks belong to Category IV with an H3-type hysteresis loop. The absorbance and the specific surface area (SBET) of the specimen in optimal ratio are 14.24 g/cm3 and 2.314 m2/g, respectively. The total pore volume decreases by 67.19–77.08 %. In the process, Si–O–Si and Al–O–Si are broken down during hydration, and polymers such as Si–O–Na, Si–OH, Al(OH)4−, Al(OH)52−, and Al(OH)63− were formed.

Author Information

Dong, Yiqie
School of Resource and Environmental Sciences, Wuhan University, Wuhan, People’s Republic of China
Zhou, Min
School of Resource and Environmental Sciences, Wuhan University, Wuhan, People’s Republic of China Hubei Environmental Remediation Material Engineering Technology Research Center, Wuhan, People’s Republic of China
Liang, Anna
School of Resource and Environmental Sciences, Wuhan University, Wuhan, People’s Republic of China
You, Yiwen
School of Resource and Environmental Sciences, Wuhan University, Wuhan, People’s Republic of China
Wang, Zhongyi
School of Resource and Environmental Sciences, Wuhan University, Wuhan, People’s Republic of China
Hou, Haobo
Hubei Environmental Remediation Material Engineering Technology Research Center, Wuhan, People’s Republic of China
Pages: 19
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Stock #: JTE20180438
ISSN: 0090-3973
DOI: 10.1520/JTE20180438