A Study on the Bonding Properties of SBR/WER Composite-Modified Emulsified Asphalt Waterproof Bonding Layer for Bridge Floors
To address the inadequate bonding performance between layers of cement concrete bridge decks, this paper proposes the use of styrene butadiene latex/water-based epoxy resin (SBR/WER) composite modified emulsified asphalt as a waterproof bonding material. Three materials were employed as waterproof b...
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| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Wiley
2025-01-01
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| Series: | Advances in Materials Science and Engineering |
| Online Access: | http://dx.doi.org/10.1155/amse/1136796 |
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| Summary: | To address the inadequate bonding performance between layers of cement concrete bridge decks, this paper proposes the use of styrene butadiene latex/water-based epoxy resin (SBR/WER) composite modified emulsified asphalt as a waterproof bonding material. Three materials were employed as waterproof bonding layers (WBLs) for comparative study: original emulsified asphalt, 3%SBR-modified emulsified asphalt and 3%SBR + 15%WER composite-modified emulsified asphalt. The interlayer shear strength of the composite specimen structured as “cement concrete bridge slab-waterproof bonding layer-asphalt pavement layer” was evaluated under different influencing factors, including the amount of waterproof bond layer and temperature, using a direct shear apparatus designed by the authors. Finally, the strengthening and weakening mechanism of the interlayer bond performance was analyzed by the interlayer shear failure mode. The test results demonstrate that the shear strength of the composite specimens with three different types of WBL increases initially and then decreases as the amount of WBL increases. In addition, the shear strength of the three types of waterproof bonded composite samples declines as the temperature increases. In the context of a constant influencing factor, the composite specimen prepared by 3%SBR + 15%WER composite-modified emulsified asphalt exhibits the highest interlayer shear strength. The temperature exerts a significant influence on the shear fracture interface morphology, whereas the amount of WBL demonstrates no discernible influence. In conclusion, the performance of the 3%SBR + 15%WER composite-modified emulsified asphalt WBL is the most effective under a range of influencing factors, with the optimal amount of WBL being 0.8 kg/m2. A new type of WBL material for cement concrete bridge decks is proposed in this study. |
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| ISSN: | 1687-8442 |