Design and Preparation of Ultra-High Strength CO2 Solidified Carbonate Materials

被引：0
作者：
Zhao S. [1 ,2 ]
Liu Z. [1 ,2 ]
Wang F. [1 ]
机构：
[1] State Key Laboratory of Silicate Materials for Architectures, Wuhan
[2] School of Materials Science and Engineering, Wuhan University of Technology, Wuhan
来源：
Kuei Suan Jen Hsueh Pao/Journal of the Chinese Ceramic Society | 2023年 / 51卷 / 09期
关键词：
calcium carbonate; carbon dioxide solidified carbonate material; carbonatable binder; carbonation; ultra-high strength;
D O I：
10.14062/j.issn.0454-5648.20230232
中图分类号：
学科分类号：
摘要：
CO2 solidified carbonate material is defined as a calcium carbonate-based composite material with a rapid strength obtained via the carbonation reaction of carbonatable binders with CO2 under normal conditions. In this paper, the mechanical properties and product composition of the CO2 solidified carbonate materials with Fe doping, chitosan inducing and curing regime designing were investigated as γ-C2S was used as a carbonatable binder. The results show that the enhancing strategies have a conflicting connection with one another. The Fe–γ-C2S group with chitosan inducing (i.e., 200 MPa after 24 h curing) and the chitosan induced γ-C2S group with long curing time (i.e., 230 MPa after 7 d curing) have a high strength. The crystalline form of calcium carbonate in γ-C2S group is mainly aragonite, while the calcium carbonate in Fe–γ-C2S group is calcite. The product composition of the CO2 solidified carbonate material is another crucial factor influencing the strength. The CO2 solidified carbonate material with an ultra-high strength has a structural feature, i.e., chitosan connects two phases (silica gel and calcium carbonate), and calcite exists inside in the calcium carbonate layer and aragonite outside. The presence of calcite can provide the strength at early curing stage, while aragonite occupies the main pore space on the outside, providing a diffusion channel for CO2 at the later curing stage. © 2023 Chinese Ceramic Society. All rights reserved.
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页码：2128 / 2137
页数：9
相关论文
共 23 条
  • [1] GAO Changming, Cem Guide New Epoch(in Chinese), 25, 2, pp. 1-3, (2019)
  • [2] China Build Mater, 70, 4, pp. 59-62, (2021)
  • [3] Chen LI, DONG Shijie, China Cem(in Chinese), 9, pp. 10-15, (2021)
  • [4] ZHAO Sixue, CO2 Solidifying Mechanism of Calcium Silicate Minerals and the Structure-property Regulation of Engineered LimeStone, (2022)
  • [5] ASHRAF W, OLEK J, JAIN J., Microscopic features of non-hydraulic calcium silicate cement paste and mortar[J], Cem Concr Res, 100, pp. 361-372, (2017)
  • [6] HOU G H, CHEN J N, LU B, Et al., Composition design and pilot study of an advanced energy-saving and low-carbon rankinite clinker, Cem Concr Res, 127, (2020)
  • [7] LIU Zhichao, WANG Fazhou, HU Shuguang, J Chin Ceram Soc, 51, 5, pp. 1-12, (2023)
  • [8] ZHANG Cheng, LIU Songhui, CHANG Xiangxiang, Et al., J Funct Mater(in Chinese), 52, 12, pp. 12036-12042, (2021)
  • [9] MU Y D, LIU Z C, WANG F Z, Et al., Carbonation characteristics of γ-dicalcium silicate for low-carbon building material[J], Constr Build Mater, 177, pp. 322-331, (2018)
  • [10] MU Y D, LIU Z C, WANG F Z., Comparative study on the carbonation-activated calcium silicates as sustainable binders: reactivity, mechanical performance, and microstructure[J], ACS Sustainable Chem Eng, 7, 7, pp. 7058-7070, (2019)
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