Effect of binder-aggregate ratio on the mechanical and functional properties of porous polyurethane cement mixture

Wang, Yanqi; Sun, Quansheng; Ding, Hongjian; Jia, Dongzhe; Li, Chunwei

doi:10.1080/10298436.2021.1995734

Cited by 6 publications

(1 citation statement)

References 51 publications

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“…Increasing the content of hard segments or larger molecular weight of soft segments is effective in enhancing hydrogen bonding and microphase separation [16]. Polyurethane concrete also possesses a certain temperature sensitivity and exhibits different mechanical properties at different temperature conditions [17][18][19]. e specimen undergoes brittle damage at low temperatures and plastic damage at high temperatures [10].…”

Section: Introductionmentioning

confidence: 99%

Investigation of Interfacial Bonding Properties of Polyurethane Concrete and Cement Concrete/Steel Reinforcement

Wang

Sun

Ding

et al. 2022

Advances in Materials Science and Engineering

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To solve the problem that the repair material of the bridge's expansion joint anchorage area is prone to debonding from the other bridge components, polyurethane concrete was designed and prepared, and the bonding performance of polyurethane concrete was tested by the bond splitting test, bond direct shear test, bond oblique shear test, and steel reinforcement pull-out test. The results show that the interfacial bond strength of polyurethane concrete and cement concrete can be improved by increasing the interfacial roughness. The bond splitting strength increases by up to 91.4%, the bond direct shear strength increases by up to 55.2%, and the bond oblique shear strength increases by up to 28.9%. The bond strength between polyurethane concrete and cement concrete are minimally influenced by temperature. An increase in the diameter of the reinforcement or the length of the bonded anchorage can increase the ultimate pull-out strength of the polyurethane concrete and the steel reinforcement. Polyurethane concrete is a novel composite material with excellent bonding performance with cement concrete and steel reinforcement, which can be widely used in practical projects, such as repairing bridge expansion joint anchorage areas in the future.

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