Materials 2013, 6(11), 5069-5076; doi:10.3390/ma6115069
Article

Influence of Curing on the Strength Development of Calcium-Containing Geopolymer Mortar

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Received: 12 September 2013; in revised form: 23 October 2013 / Accepted: 29 October 2013 / Published: 7 November 2013
(This article belongs to the Section Advanced Composites)
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Abstract: This paper investigated the curing effects on the mechanical properties of calcium-containing geopolymer mortar. Three precursors are used: Class C fly ash, Class F fly ash plus calcium hydroxide and Class F fly ash plus slag. Curing conditions included: (1) standard curing at 20 ± 3 °C and RH 95% (C); (2) steam curing at 60 °C for 24 h (S); (3) steam curing at 60 °C for 6 h (S6); and (4) oven curing at 60 °C for 24 h (O), then the latter three followed by the standard curing. Under the standard conditions, the flexural strength and compressive strength of Class C fly ash geopolymer mortars developed quickly until the age of 7 days, followed by a gradual increase. Specimens with Class F fly ash plus Ca(OH)2 showed slow increase till the age of 28 days. Under these non-standard conditions (2–4), all specimens showed higher 3-day strength, while later strengths were either higher or lower than those in standard conditions, depending on the type of the precursor.
Keywords: geopolymer mortar; fly ash; calcium; curing conditions; strength development
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MDPI and ACS Style

Li, X.; Wang, Z.; Jiao, Z. Influence of Curing on the Strength Development of Calcium-Containing Geopolymer Mortar. Materials 2013, 6, 5069-5076.

AMA Style

Li X, Wang Z, Jiao Z. Influence of Curing on the Strength Development of Calcium-Containing Geopolymer Mortar. Materials. 2013; 6(11):5069-5076.

Chicago/Turabian Style

Li, Xueying; Wang, Zheng; Jiao, Zhenzhen. 2013. "Influence of Curing on the Strength Development of Calcium-Containing Geopolymer Mortar." Materials 6, no. 11: 5069-5076.

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