Understanding the roles of Li2CO3 in a sulphoaluminate cement system at negative temperatures

Yanlin Huo; Sile Hu; Dong Lu; Xiaoyu Han; Huayang Sun; Xiaobing Ma; Tianan Liu; Chen Zhang; Zhitao Chen; Jinguang Huang; Yingzi Yang

Case Studies in Construction Materials (Dec 2023)

Understanding the roles of Li2CO3 in a sulphoaluminate cement system at negative temperatures

Yanlin Huo,
Sile Hu,
Dong Lu,
Xiaoyu Han,
Huayang Sun,
Xiaobing Ma,
Tianan Liu,
Chen Zhang,
Zhitao Chen,
Jinguang Huang,
Yingzi Yang

Affiliations

Yanlin Huo: School of Civil Engineering, Harbin Institute of Technology, Harbin 150090, China; Key Lab of Structures Dynamic Behavior and Control of the Ministry of Education, Harbin Institute of Technology, Harbin 150090, China; Key Lab of Smart Prevention and Mitigation of Civil Engineering Disasters of the Ministry of Industry and Information Technology, Harbin Institute of Technology, Harbin 150090, China
Sile Hu: School of Civil Engineering, Harbin Institute of Technology, Harbin 150090, China; Key Lab of Structures Dynamic Behavior and Control of the Ministry of Education, Harbin Institute of Technology, Harbin 150090, China; Key Lab of Smart Prevention and Mitigation of Civil Engineering Disasters of the Ministry of Industry and Information Technology, Harbin Institute of Technology, Harbin 150090, China
Dong Lu: School of Civil Engineering, Harbin Institute of Technology, Harbin 150090, China; Key Lab of Structures Dynamic Behavior and Control of the Ministry of Education, Harbin Institute of Technology, Harbin 150090, China; Key Lab of Smart Prevention and Mitigation of Civil Engineering Disasters of the Ministry of Industry and Information Technology, Harbin Institute of Technology, Harbin 150090, China; Corresponding authors at: School of Civil Engineering, Harbin Institute of Technology, Harbin 150090, China.
Xiaoyu Han: School of Civil Engineering, Harbin Institute of Technology, Harbin 150090, China; Key Lab of Structures Dynamic Behavior and Control of the Ministry of Education, Harbin Institute of Technology, Harbin 150090, China; Key Lab of Smart Prevention and Mitigation of Civil Engineering Disasters of the Ministry of Industry and Information Technology, Harbin Institute of Technology, Harbin 150090, China
Huayang Sun: School of Civil Engineering, Harbin Institute of Technology, Harbin 150090, China; Key Lab of Structures Dynamic Behavior and Control of the Ministry of Education, Harbin Institute of Technology, Harbin 150090, China; Key Lab of Smart Prevention and Mitigation of Civil Engineering Disasters of the Ministry of Industry and Information Technology, Harbin Institute of Technology, Harbin 150090, China
Xiaobing Ma: School of Civil Engineering, Harbin Institute of Technology, Harbin 150090, China; Key Lab of Structures Dynamic Behavior and Control of the Ministry of Education, Harbin Institute of Technology, Harbin 150090, China; Key Lab of Smart Prevention and Mitigation of Civil Engineering Disasters of the Ministry of Industry and Information Technology, Harbin Institute of Technology, Harbin 150090, China
Tianan Liu: Institute of Engineering Research, Shanghai Construction No 4 Group Co Ltd, Shanghai 200000, China
Chen Zhang: School of Civil Engineering, Harbin Institute of Technology, Harbin 150090, China; Key Lab of Structures Dynamic Behavior and Control of the Ministry of Education, Harbin Institute of Technology, Harbin 150090, China; Key Lab of Smart Prevention and Mitigation of Civil Engineering Disasters of the Ministry of Industry and Information Technology, Harbin Institute of Technology, Harbin 150090, China
Zhitao Chen: School of Civil Engineering, Harbin Institute of Technology, Harbin 150090, China; Key Lab of Structures Dynamic Behavior and Control of the Ministry of Education, Harbin Institute of Technology, Harbin 150090, China; Key Lab of Smart Prevention and Mitigation of Civil Engineering Disasters of the Ministry of Industry and Information Technology, Harbin Institute of Technology, Harbin 150090, China; Corresponding authors at: School of Civil Engineering, Harbin Institute of Technology, Harbin 150090, China.
Jinguang Huang: Zhejiang Construction Engineering Group Co., Ltd., Hangzhou 310012, China
Yingzi Yang: School of Civil Engineering, Harbin Institute of Technology, Harbin 150090, China; Key Lab of Structures Dynamic Behavior and Control of the Ministry of Education, Harbin Institute of Technology, Harbin 150090, China; Key Lab of Smart Prevention and Mitigation of Civil Engineering Disasters of the Ministry of Industry and Information Technology, Harbin Institute of Technology, Harbin 150090, China; Corresponding authors at: School of Civil Engineering, Harbin Institute of Technology, Harbin 150090, China.

Journal volume & issue: Vol. 19
p. e02574

Abstract

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To overcome the slow development of mechanical strengths of sulphoaluminate cement (CSA) in winter construction, this paper investigates the effects of different amounts of admixing Li2CO3 on the setting time, compressive strength, and cooling curve of CSA paste in negative temperatures (−5 °C, −10 °C, and −20 °C). The influence of admixing Li2CO3 on the hydration process and microstructure of CSA paste in a negative temperature environment is also studied using X-ray diffraction (XRD)-Rietveld quantitative analysis, Thermogravimetry (TG) analysis, and Scanning electron microscopy (SEM) observation. The results show that adding Li2CO3 into CSA can significantly improve the mechanical properties at an early age, shorten the curing time, and reduce the freezing point under negative temperatures. The XRD-Rietveld and TG analysis indicates that adding Li2CO3 can increase the consumption of C4A3S̅ and promote the generation of AFt at negative temperatures. It is recommended that the optimum dosage of Li2CO3 should be 0.16 wt% when used as an admixture for CSA systems in negative temperatures.

Published in Case Studies in Construction Materials

ISSN: 2214-5095 (Online)
Publisher: Elsevier
Country of publisher: United Kingdom
LCC subjects: Technology: Electrical engineering. Electronics. Nuclear engineering: Materials of engineering and construction. Mechanics of materials
Website: https://www.journals.elsevier.com/case-studies-in-construction-materials

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