快速修补用高早强高延性混凝土的力学行为

doi:10.11896/cldb.23070057

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Abstract Based on the application background of pavement repair, the mechanical properties of low fiber content and high-early-strength high-ductility concrete (HES-HDC) including compressive, flexural, uniaxial tensile, and four-point bending behaviors were investigated. The effect of different roughness grades on the interfacial shear strength between HES-HDC and existing concrete was also considered. In addition, the abrasion resistance and impermeability of HES-HDC were measured and compared with normal concrete. The results show that the compressive strength, flexural strength, and bending tensile strength of HES-HDC at 2 h curing age reach 29 MPa, 8 MPa, and 13 MPa, respectively, meeting the requirements of traffic opening. Under tensile and bending loads, the test curves of HES-HDC exhibit strain-hardening characteristics, with a 28-day tensile strain of 2.63% and an elastic modulus of approximately 19.9 GPa. Compared with PVA fiber-reinforced HES-HDC beams, the initial bending toughness ratio and residual bending toughness ratio of PE fiber-reinforced HES-HDC beams increase by 15.2% and 2.0% at 2 h curing age, respectively, and by 88.3% and 1.1% at 24 h curing age, respectively. The interfacial shear strength between HES-HDC and concrete increases significantly with the increase of age and roughness grades. Even if HES-HDC is bonded to concrete with a smooth surface, the interfacial shear strength at 2 h curing age could still reach 1.25 MPa, satisfying the need of rapid repair. The HES-HDC has comparative abrasion resistance to normal concrete, and which complies with the specifications for high-speed, first-class highway pavement concrete. Specially, its permeability is much higher than that of normal concrete.

Key words： high-ductility concrete (HDC) early strength repair material mechanical performance interfacial shear strength abrasion resis-tance impermeability

Published: 10 August 2025 Online: 2025-08-13

CLC number:

TU528.58

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	Articles by authors
	YANG Jiasheng
	DENG Mingke
	ZHANG Yangxi
	ZHANG Min
	FAN Hongkan

Cite this article:

YANG Jiasheng,DENG Mingke,ZHANG Yangxi, et al. Mechanical Properties of High-early-strength High-ductility Concrete for Rapid Repair[J]. Materials Reports, 2025, 39(15): 23070057-8.

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https://www.mater-rep.com/EN/10.11896/cldb.23070057 OR https://www.mater-rep.com/EN/Y2025/V39/I15/23070057

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