利用H<sub>2</sub>O<sub>2</sub>发泡和碳化养护改善RMFC的固碳、力学和保温隔热性能

doi:10.11896/cldb.22070288

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Abstract Developing new low-carbon cementitious materials to replace high-energy consumption and carbon emission ordinary Portland cement is one of the critical approaches for carbon reduction in the cement and construction industries. In this study, we prepared a rapidly carbon-sequestering and thermally insulating material, reactive magnesium oxide foam concrete (RMFC), by foaming reactive magnesium oxide cement (RMC) with H₂O₂ and curing with CO₂. We investigated the influence of factors such as water-ash ratio, H₂O₂ dosage, and H₂O₂ preheating temperature on the foaming behavior of RMC paste. Additionally, we studied the effects of porosity, curing conditions, and carbonation time on the carbonation behavior of RMFC, and analyzed the mechanisms governing the impact of porosity, curing conditions, and carbonation time on the mechanical and thermal insulation properties of RMFC. The results showed that by appropriately increasing the water-ash ratio, we could extend the initial setting time of RMC paste, while preheating H₂O₂ enhanced its decomposition rate, enabling the production of high-porosity RMFC. Furthermore, increasing porosity, elevating CO₂ concentration, and reducing carbonation temperature significantly enhanced the CO₂ sequestration rate. Different curing temperatures led to variations in carbonation products. Reducing porosity or increasing the carbonation level resulted in higher strength but higher thermal conductivity in RMFC. Through experimentation, we achieved RMFC with densities ranging from 635 kg/m³ to 1 335 kg/m³, compressive strengths between 3.75 MPa and 9.1 MPa, and thermal conductivities of 0.32 W/(m·K) to 0.49 W/(m·K) after carbonation curing for 12 h to 48 h. The proposed method for RMFC preparation demonstrated a substantial CO₂ sequestration effect, with a maximum CO₂ sequestration of 0.42 tons per ton of RMC. Replacing ordinary Portland cement foam concrete with RMFC has the potential to contribute to carbon emissions reduction in the cement and construction industries.

Key words： reactive magnesium oxide cement (RMC) carbonation curing foam concrete mechanical properties thermal conductivity

Published: 10 December 2023 Online: 2023-12-08

CLC number:

TU528

Fund:National Natural Science Foundation of China (51878068), the Hunan Science Fund for Distinguished Young Scholars (2017JJ1027), and the Postgraduate Scientific Research Innovation Project of Hunan Province (QL20210189).

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	LIU Kuizhou
	ZHANG Jianren
	TIAN Xiang
	HUANG Dunwen
	PENG Hui

Cite this article:

LIU Kuizhou,ZHANG Jianren,TIAN Xiang, et al. Improving Carbon Sequestration, Mechanical Properties and Thermal Insulation of RMFC by Foaming with H₂O₂ and Carbonization Curing[J]. Materials Reports, 2023, 37(23): 22070288-8.

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http://www.mater-rep.com/EN/10.11896/cldb.22070288 OR http://www.mater-rep.com/EN/Y2023/V37/I23/22070288

1 Benhelal E, Zahedi G, Shamsaei E, et al. Journal of Cleaner Production, 2013, 51(1), 142.
2 Ruan S, Unluer C. Journal of Cleaner Production, 2016, 137(20), 258.
3 Dung N T, Unluer C. Cement and Concrete Research, 2019, 118, 92.
4 Silva P D, Bucea L, Sirivivatnanon V. Cement and Concrete Research, 2009, 39(5), 460.
5 Thomas J J, Musso S, Prestini I. Journal of the American Ceramic Society, 2014, 97(1), 275.
6 Sonat C, Lim C H, Liska M, et al. Construction and Building Materials, 2017, 157, 172.
7 Gartner E, Sui T. Cement and Concrete Research, 2018, 114, 27.
8 Unluer C, Al-Tabbaa A. Cement and Concrete Research, 2014, 59, 55.
9 Dung N T, Unluer C. Construction and Building Materials, 2017, 143, 71.
10 Dung N T, Unluer C. Journal of Materials in Civil Engineering, 2018, 30(12), 04018320.
11 Dung N T, Hay R, Lesimple A, et al. Cement and Concrete Composites, 2021, 115, 103826.
12 Vandeperre L J, Al-Tabbaa A. Advances in Cement Research, 2007, 19(2), 67.
13 Dung N T, Unluer C. Cement and Concrete Research, 2018, 103, 160.
14 Ruan S, Unluer C. Construction and Building Materials, 2017, 142, 221.
15 Yu J L, Wang P X, Yan X Q, et al. Chemical Engineering, 2014(6),54(in Chinese).
喻健良, 王培昕, 闫兴清,等. 化学工程, 2014(6), 54.
16 Shi S Q, Zhou H M. Chemical World, 1997, 38(3), 128(in Chinese).
石双群, 周红敏.化学世界, 1997, 38(3), 128.
17 Zhong X, Li L, Jiang Y, et al. Construction and Building Materials, 2021, 302, 124158.
18 Humbert P S, Castro-Gomes J P, Savastano H. Construction and Building Materials, 2019, 210, 413.
19 Jauffret G, Morrison J, Glasser F. Journal of Thermal Analysis and Calorimetry, 2015, 122(2), 601.
20 Purwajanti S, Zhou L, Nor Y A, et al. ACS Applied Materials & Interfaces, 2015, 7(38), 21278.
21 Dung N T, Simple A, Hay R, et al. Cement and Concrete Research, 2019, 125, 105894.
22 Mo L, Zhang F, Deng M, et al. Cement and Concrete Composites, 2016, 70, 78.
23 Hay R, Celik K. Journal of Cleaner Production, 2020, 248, 119282.
24 Liu J, Qi W, Liu R Q, et al. Concrete, 2016(5), 4 (in Chinese).
刘军, 齐玮, 刘润清,等. 混凝土, 2016(5), 4.
25 Kearsley E P, Wainwright P J. Cement and Concrete Research, 2002, 32(2), 233.
26 Ruan S, Unluer C. Cement and Concrete Composites, 2017, 80, 104.
27 Hu X P, Li X Y, Han B Q, et al. Bulletin of the Chinese Ceramic Society, 2014, 33(11), 6 (in Chinese).
胡新萍, 李翔宇, 韩保清,等.硅酸盐通报, 2014, 33(11), 6.
28 Guan L Y. Research on the air-void system characterization and regulation and properties of foamed concrete. Master's Thesis, Wuhan University of Technology China, 2014(in Chinese).
关凌岳. 泡沫混凝土孔结构表征与调控方法及其性能研究.硕士学位论文,武汉理工大学, 2014.