基于离差最大化-灰色关联的修补混凝土配合比评价

doi:10.11896/cldb.22040151

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Abstract In view of the complex service environment of damaged concrete in northwest China, the orthogonal test scheme of repair concrete was designed by using replacements rate of silica powder, sodium silicate, UEA expansion agent and amount of basalt fiber as main factors. Based on the performance of concrete, including mechanical property, volume stability and workability, twelve test indexes, i.e., compressive strength at 3, 7 and 28 d, expansion rate at 1, 3, 7, 14, 28, 45, 60 and 90 d and slump determined in order of importance, were introduced. For the test results, the model of maximizing deviation and grey correlation was established to evaluate the mix ratio of repair concrete. By using it, a mix ratio X4 of repair concrete was optimized, which had good slump, high strength in early stage and good strength development in later stage. In addition, this comprehensive evaluation model can scientifically and reasonably reflect the subjective opinion of the evaluator on the importance of the indexes and the objectivity of the actual test results. It can be used for the comprehensive evaluation and the optimization of concrete proportion under the condition of multi-factor and multi-dynamic index.

Key words： maximum deviation grey correlation repair concrete proportion evaluation

Published: 25 March 2024 Online: 2024-04-07

CLC number:

TU528

Fund:National Natural Science Foundation of China (51868065).

Corresponding Authors: ^*yangshuyan@nxu.edu.cn

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	YANG Shuyan
	XU Panpan
	SONG Junjie
	CHEN Xiaolong

Cite this article:

YANG Shuyan,XU Panpan,SONG Junjie, et al. Evaluation on Proportion of Repair Concrete Based on Maximum Deviation and Grey Correlation[J]. Materials Reports, 2024, 38(6): 22040151-7.

URL:

https://www.mater-rep.com/EN/10.11896/cldb.22040151 OR https://www.mater-rep.com/EN/Y2024/V38/I6/22040151

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