Materials 2013, 6(4), 1485-1495; doi:10.3390/ma6041485
Article

Mechanical Properties and Microstructure of Class C Fly Ash-Based Geopolymer Paste and Mortar

1 School of Civil Engineering, Harbin Institute of Technology, Harbin 150006, China 2 Department of Civil Engineering, Harbin Institute of Technology at WeiHai, Weihai 264209, China 3 Heilongjiang Provincial Hydraulic Research Institute, Harbin 150080, China
* Authors to whom correspondence should be addressed.
Received: 21 January 2013; in revised form: 15 March 2013 / Accepted: 1 April 2013 / Published: 9 April 2013
(This article belongs to the Special Issue Geopolymers and Geopolymeric Materials)
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Abstract: This paper presents workability, compressive strength and microstructure for geopolymer pastes and mortars made of class C fly ash at mass ratios of water-to-fly ash from 0.30 to 0.35. Fluidity was in the range of 145–173 mm for pastes and 131–136 mm for mortars. The highest strengths of paste and mortar were 58 MPa and 85 MPa when they were cured at 70 °C for 24 h. In XRD patterns, unreacted quartz and some reacted product were observed. SEM examination indicated that reacted product has formed and covered the unreacted particles in the paste and mortar that were consistent with their high strength.
Keywords: geopolymer; class C fly ash; compressive strength; workability; microstructure

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MDPI and ACS Style

Li, X.; Ma, X.; Zhang, S.; Zheng, E. Mechanical Properties and Microstructure of Class C Fly Ash-Based Geopolymer Paste and Mortar. Materials 2013, 6, 1485-1495.

AMA Style

Li X, Ma X, Zhang S, Zheng E. Mechanical Properties and Microstructure of Class C Fly Ash-Based Geopolymer Paste and Mortar. Materials. 2013; 6(4):1485-1495.

Chicago/Turabian Style

Li, Xueying; Ma, Xinwei; Zhang, Shoujie; Zheng, Enzu. 2013. "Mechanical Properties and Microstructure of Class C Fly Ash-Based Geopolymer Paste and Mortar." Materials 6, no. 4: 1485-1495.

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