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Article

Properties of Blended Cement Containing Iron Tailing Powder at Different Curing Temperatures

1
Beijing Urban Construction Group Co., Ltd., Beijing 100081, China
2
Beijing Key Laboratory of Urban Underground Space Engineering, Department of Civil Engineering, University of Science and Technology Beijing, Beijing 100083, China
*
Author to whom correspondence should be addressed.
Academic Editor: Luigi Coppola
Materials 2022, 15(2), 693; https://doi.org/10.3390/ma15020693
Received: 10 December 2021 / Revised: 30 December 2021 / Accepted: 14 January 2022 / Published: 17 January 2022
(This article belongs to the Special Issue Industrial Solid Wastes for Construction and Building Materials)
The properties of blended cement containing 0%, 20%, and 50% iron tailing powder (ITP) at 20 °C and 60 °C were investigated by determining the hydration heat, microstructure, and compressive strength. The addition of ITP decreases the exothermic rate and cumulative hydration heat of blended cement at 20 °C. The high temperature increases the hydration rate and leads to the hydration heat of blended cement containing 20% ITP higher than that of Portland cement. Increasing the amount of ITP decreases the non-evaporable water content and Ca(OH)2 content as well as compressive strength at both of the two studied temperatures. The addition of ITP coarsens the early-age pore structure but improves the later-age pore structure at 20 °C. The high temperature significantly improves the early-age properties of blended cement containing ITP, but it is detrimental to the later-age properties development. The reaction of ITP is limited even at high temperature. The large ITP particles bond poorly with surrounding hydration products under early high-temperature curing condition. The properties of blended cement containing a large amount of ITP are much poorer at high temperature. View Full-Text
Keywords: iron tailing powder; blended cement; hydration heat; microstructure; compressive strength iron tailing powder; blended cement; hydration heat; microstructure; compressive strength
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MDPI and ACS Style

Wang, H.; Han, F.; Pu, S.; Zhang, H. Properties of Blended Cement Containing Iron Tailing Powder at Different Curing Temperatures. Materials 2022, 15, 693. https://doi.org/10.3390/ma15020693

AMA Style

Wang H, Han F, Pu S, Zhang H. Properties of Blended Cement Containing Iron Tailing Powder at Different Curing Temperatures. Materials. 2022; 15(2):693. https://doi.org/10.3390/ma15020693

Chicago/Turabian Style

Wang, Heng, Fanghui Han, Shaochang Pu, and Hongbo Zhang. 2022. "Properties of Blended Cement Containing Iron Tailing Powder at Different Curing Temperatures" Materials 15, no. 2: 693. https://doi.org/10.3390/ma15020693

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