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The Influence of Composite Ratio on the Setting Time and Flexural Bond Strength of OPC-SAC Binary Pavement Repair Material

Author(s)

Yuxin Yang1, Shuang Yao1,*, Ni Li2, Nan Li2, Mingjia Xu1, Jianan Liang1

Affiliation(s)

1School of Civil Engineering and Architecture, Yangtze Normal University, Chongqing, China 2Yicheng Construction Project Management Co., Ltd., Xi’an, China *Corresponding Author

Abstract

To address the demand for cement concrete pavement repair, this paper studies the effect of OPC-SAC composite ratio on the setting time and flexural bond strength of binary pavement repair materials under standard conditions, and determines the standard consistency water requirement. It also analyzes the influence of different ratios on flexural/compressive strength to verify the feasibility of durable pavement repair. Seven composite ratios (10:0 to 0:10) were set to test water requirement, setting time and fluidity; 36 groups of specimens with six ratios were prepared to test flexural bond strength at 1, 3, 7 days. Results show that SAC reduces OPC’s standard consistency water consumption, shortens setting time, and increases fluidity by 200%, achieving performance complementarity (SAC dosage must be controlled). The 7-day flexural bond strength is the highest (1.2MPa), peaking at OPC: SAC=6:4 (increase rate 140%), suitable for pavement repair. Appropriate ratios can be selected to optimize performance, providing technical support for cement concrete pavement maintenance.

Keywords

Composite Ratio; OPC-SAC Binary Repair Material; Setting Time; Flexural Bond Strength

References

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