引气剂起泡和稳泡能力的温度敏感性研究

doi:10.11896/cldb.22030209

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Abstract Low temperature affects the usage of air-entraining agents (AEA) during the concrete construction in cold area. In order to study the different responses to temperature change of the foaming properties of different kinds of AEA, the foam volume, the surface activity and the bulk viscosity of three kinds of AEA were tested at the temperature between 0 ℃ and 30 ℃ using the method of Waring-Blender. The temperature susceptibility of intermolecular interaction force varies with different molecular structures. The grey correlation analysis results show the key factors influencing the foamability of AEA are the surface tension γ, the saturation adsorption amount Γ_max, the minimum molecular area A_min. As for the foam stability of AEA, the key factors are γ, Γ_max and η. With temperature decreases, the increasing degree of the surface tension, the maximum adsorption and the viscosity, together with the decreasing degree of the minimum molecular area when the temperature changes from 30 ℃ to 0 ℃ varies because of the temperature susceptibility of surface activity. The temperature susceptibility of foaming capacity and stability of AEA are affected by various factors. The research is expected to provide an in-depth understanding of the temperature sensitivity of different AEAs.

Key words： air-entraining agent foamability foam stability surface tension grey correlational analysis

Published: 25 September 2023 Online: 2023-09-18

CLC number:

TU528

Fund:National Natural Science Foundation of China (51972295) and National Key R & D Program of China (2017YFB0309903).

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	LUO Xiang
	WANG Ling
	WANG Zhendi

Cite this article:

LUO Xiang,WANG Ling,WANG Zhendi. Temperature Susceptibility of Foamability and Foam Stability of Air-entraining Agent[J]. Materials Reports, 2023, 37(18): 22030209-8.

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http://www.mater-rep.com/EN/10.11896/cldb.22030209 OR http://www.mater-rep.com/EN/Y2023/V37/I18/22030209

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