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Variation of Temperature Stress for Concrete in Industrial Intelligent Steam Curing Environment

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DOI: 10.23977/ieim.2022.051102 | Downloads: 10 | Views: 444

Author(s)

Wu Mengshan 1, Yang Xiaoyan 2,3, Qiu Songli 3

Affiliation(s)

1 School of Civil Engineering, Chongqing Jiaotong University, Chongqing, 315000, China
2 School of Civil Engineering & Architecture, Ningbo Tech University, Ningbo, Zhejiang, 315000, China
3 Ningbo Communication Engineering Construction Group Co., Ltd., Ningbo, Zhejiang, 315000, China

Corresponding Author

Yang Xiaoyan

ABSTRACT

There is a large temperature difference between inside and surface of concrete components for its own hydration degree in the environment of industrial intelligent steam curing. It has a certain negative impact on the quality of concrete. In this paper, the temperature variation and hydration degree of 30m prefabricated T-beams in the whole process are analyzed by field tests. On this basis, industrial production process parameters such as temperature, humidity and curing time are optimized. Theoretical temperature field and stress distribution law which conform to industrial intelligent steam curing production process are proposed by temperature-structure coupling method. The results show that the industrial intelligent steam curing production process includes three stages of heating, constant temperature and cooling. The first curing chamber of concrete is heated to 50℃ with 10℃/h, and then enters the next curing chamber after 5h. The second curing chamber keeps temperature of 50℃ and 0.5h, then cools to 30℃ with 10℃/h, and stops steam input, 2.5h natural cools to end steam. The local stresses concentration for the T-beam and diaphragm are generated with steam curing 10h. The maximum principal tensile stress of diaphragm reaches maximum by sharp drop of ambient temperature with curing 10h.

KEYWORDS

Industrialized production, Prefabricated t-beam, Steam curing chamber, Temperature field, Temperature stress

CITE THIS PAPER

Wu Mengshan, Yang Xiaoyan, Qiu Songli, Variation of Temperature Stress for Concrete in Industrial Intelligent Steam Curing Environment. Industrial Engineering and Innovation Management (2022) Vol. 5: 6-13. DOI: http://dx.doi.org/10.23977/ieim.2022.051102.

REFERENCES

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