低温养护对环氧树脂基砂浆早期性能的影响及机理

doi:10.11896/cldb.23080222

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Abstract Epoxy resin based mortar is a new high-performance engineering material. In order to study the effect of low temperature curing conditions on the working performance and early mechanical properties of epoxy resin based mortar, a low-temperature environment was constructed using a low temperature test system. The compressive strength, flexural strength, flowability, setting time, and internal temperature were tested, and the microstructure and pore structure of epoxy resin based mortar were analyzed. The results show that the performance of epoxy resin based mortar is greatly affected by temperature. When the temperature is 0 ℃, the fluidity is only 112 mm, but it increases rapidly with increasing temperature. Low temperature curing weakens the internal thermal effect of mortar and delays the setting time. The early strength loss is also significant. At 0 ℃, the mortar is cured for 1 d to form strength, indicating that the low-temperature environment greatly delays the curing rate of the system. Microscopic analysis shows that low-temperature curing leads to loose internal structure, increases cracks and pores in the mortar, indicating incomplete curing reaction and thus reducing the performance of the mortar. When the curing temperature is 20 ℃, the internal structure is relatively dense and the macro structure also exhibits high strength.

Key words： epoxy resin based mortar rapid repair material low temperature curing early mechanical property working performance microstructure

Published: 10 March 2024 Online: 2024-03-18

CLC number:

TV432+.8

Fund:National Natural Science Foundation of China (52278287).

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	Articles by authors
	LYU Yan
	BAI Erlei
	WANG Zhihang
	XIA Wei

Cite this article:

LYU Yan,BAI Erlei,WANG Zhihang, et al. Effect and Mechanism of Low Temperature Curing on the Early Performance of Epoxy Resin Based Mortar[J]. Materials Reports, 2024, 38(5): 23080222-6.

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http://www.mater-rep.com/EN/10.11896/cldb.23080222 OR http://www.mater-rep.com/EN/Y2024/V38/I5/23080222

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