Study on Sustainable Application of Low-Carbon Supersulfated Cement with Alkanolamines

Runduo Zhou, Bingxin Jin, Shuanglei Wu, Shujing Fan, Fafu Hang and Huxing Chen ()
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Runduo Zhou: School of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, China
Bingxin Jin: School of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, China
Shuanglei Wu: School of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, China
Shujing Fan: Linhai Zhongxin New Building Materials Co., Ltd., Taizhou 317000, China
Fafu Hang: Linhai Zhongxin New Building Materials Co., Ltd., Taizhou 317000, China
Huxing Chen: School of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, China

Sustainability, 2024, vol. 16, issue 7, 1-20

Abstract: As an environmentally friendly cement material in green buildings, due to its low contribution to air pollution and its substantial use of solid waste, supersulfated cement (SSC) has been extensively studied. However, the low early strength of sustainably utilized SSC needs to be addressed. In order to use SSC to achieve great reductions in energy consumption during industrial production, the effects of triethanolamine (TEA), diethanolisopropanolamine (DEIPA) and triisopropanolamine (TIPA) (with dosages ranging from 0.02% to 0.08%) on the strength and hydration of SSC were studied, and the underlying mechanism was analyzed by TGA, XRD and SEM. The results show that TEA and DEIPA significantly improve the 3-day and 28-day strength of SSC. The former is better at low dosages, while the latter is more suitable for high dosages. TIPA also enhances the 3-day strength of SSC, but it is not as good as the other two alkanolamines. The chelation of alkanolamine with Al 3+ ions plays an important role in the strength development of SSC, which accelerates the decomposition of slag and the formation of ettringite. In summary, adding alkanolamines to low-carbon cement systems with a high proportion of industrial by-products such as SSC is a potential and effective solution. In addition, alkanolamines can be used as a strength promoter for most low-carbon blends, which fully utilize solid waste.

Keywords: low-carbon cement; solid waste; supersulfated cement; ground granulated blast furnace slag; sustainable application; alkanolamine (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2024
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