高强混凝土材料细观冻融损伤与抗压强度的关系<sup>*</sup>

doi:10.11896/j.issn.1005-023X.2017.02.025

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Abstract In order to figure out the freeze-thaw damage mechanism of high-strength concrete and its relationship with compressive strength, a method combining RapidAir and digital metalloscope was employed to investigate the meso-damages of concrete throughout the freeze-thaw test. The meso-structure′s sensitivity to freeze-thaw damage and the relationship between meso-damage and macro-damage were studied. Results show that high-strength concrete with low air content and large spacing factor does not result in poor freeze-thaw resistance. Pore groups are sensitive to freeze-thaw damage, and micro-cracks tend to appear early between them. This phenomenon corresponds well with the compressive strength loss in the early stage of freeze-thaw cycles (FTCs), but these micro-cracks will not lead to a drastic compressive strength loss. Isolated pore and interfacial transition zone are not sensitive to freeze-thaw damage. If these areas are damaged, the compressive strength will drop non-linearly, indicating the coming macroscopic failure.

Key words： high-strength concrete freeze-thaw cycle mesoscopic damage quantitative analysis compressive strength

Published: 02 May 2018

CLC number:

TU502

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	Articles by authors
	QIN Xiaochuan
	MENG Shaoping
	TU Yongming

Cite this article:

QIN Xiaochuan,MENG Shaoping,TU Yongming. Relationship Between Mesoscopic Freeze-thaw Damage and Compressive Strength of High-strength Concrete Material[J]. Materials Reports, 2017, 31(2): 117-120.

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http://www.mater-rep.com/EN/10.11896/j.issn.1005-023X.2017.02.025 OR http://www.mater-rep.com/EN/Y2017/V31/I2/117

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