CLC number: TQ172
On-line Access: 2011-02-08
Received: 2010-08-25
Revision Accepted: 2010-11-29
Crosschecked: 2010-12-30
Cited: 7
Clicked: 7819
Pei-ming Wang, Xian-ping Liu. Effect of temperature on the hydration process and strength development in blends of Portland cement and activated coal gangue or fly ash[J]. Journal of Zhejiang University Science A, 2011, 12(2): 162-170.
@article{title="Effect of temperature on the hydration process and strength development in blends of Portland cement and activated coal gangue or fly ash",
author="Pei-ming Wang, Xian-ping Liu",
journal="Journal of Zhejiang University Science A",
volume="12",
number="2",
pages="162-170",
year="2011",
publisher="Zhejiang University Press & Springer",
doi="10.1631/jzus.A1000385"
}
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%T Effect of temperature on the hydration process and strength development in blends of Portland cement and activated coal gangue or fly ash
%A Pei-ming Wang
%A Xian-ping Liu
%J Journal of Zhejiang University SCIENCE A
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%I Zhejiang University Press & Springer
%DOI 10.1631/jzus.A1000385
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T1 - Effect of temperature on the hydration process and strength development in blends of Portland cement and activated coal gangue or fly ash
A1 - Pei-ming Wang
A1 - Xian-ping Liu
J0 - Journal of Zhejiang University Science A
VL - 12
IS - 2
SP - 162
EP - 170
%@ 1673-565X
Y1 - 2011
PB - Zhejiang University Press & Springer
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DOI - 10.1631/jzus.A1000385
Abstract: This paper describes the results of an investigation into the effect of the variation of curing temperatures between 0 and 60 (C on the hydration process, pore structure variation, and compressive strength development of activated coal gangue-cement blend (ACGC). Hardened ACGC pastes cured for hydration periods from 1 to 360 d were examined using the non-evaporable water method, thermal analysis, mercury intrusion porosimetry, and mechanical testing. To evaluate the specific effect of activated coal gangue (ACG) as a supplementary cementing material (SCM), a fly ash-cement blend (FAC) was used as a control. Results show that raising the curing temperature accelerates pozzolanic reactions involving the SCMs, increasing the degree of hydration of the cement blends, and hence increasing the rate of improvement in strength. The effect of curing temperature on FAC is greater than that on ACGC. The pore structure of the hardened cement paste is improved by increasing the curing temperature up to 40 °C, but when the curing temperature reaches 60 °C, the changing nature of the pore structure leads to a decrease in strength. The correlation between compressive strength and the degree of hydration and porosity is linear in nature.
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