ISSN 0862-5468 (Print), ISSN 1804-5847 (online) 

Ceramics-Silikáty 67, (2) 150 - 158 (2023)

Zheng Landi 1, Xiao Chunming 2,3, Zhang Minxia 1, Liao Shengrong 2, 3, Zhou Zhe 2, 3
1 School of Civil Engineering, Henan Polytechnic University, Jiaozuo 454000,
2 Road and Bridge International Co., Ltd, Beijing 101100, China,
3 Road & Bridge Southern China Engineering Co., Ltd. Zhongshan 528400, China

Keywords: Steam curing, Response surface method, Concrete, Compressive strength

The present paper adopts the response surface method to optimise the performance of steam-cured concrete by taking the compressive strength of the steam-cured concrete as the main property. Based on the single-factor test, a constant temperature time, constant temperature, heating rate, and cooling rate were selected as independent variables, and the strength of the steam-cured concrete was selected as the response value. A four-factor, three-level response surface centre combination test was designed to analyse the effects of the different factors on the strength of the steam-cured concrete. The optimum steam curing parameters for the strength of steamed concrete are a constant temperature time of 28 h; a constant temperature of 43 °C, a heating rate of 12 °C/h and a cooling rate of 15 °C/h. Under these conditions, the theoretical strength of the concrete is 52.9 MPa. The experimental results were verified under these conditions, and the strength of the steamed concrete was 53.8 MPa, which is basically consistent with the theoretical prediction of the response surface model and can be used for the actual production, it can provide some technical support for the steam curing technology of concrete in practical engineering.

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doi: 10.13168/cs.2023.0012
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