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- Title
STUDY ON REINFORCEMENT OF FABRICATED HOLLOW SLAB BRIDGE BY POLYURETHANE-CEMENT COMPOSITE (PUC).
- Authors
Zhang Kexin; Qi Tianyu; Zhu Zhimin; Xue Xingwei; Shen Xinyuan
- Abstract
In this paper, a new polyurethane-cement composite (PUC) material is used to reinforce a 25-year hollow slab bridge. PUC material is composed of polyurethane and cement, which has good mechanical properties. After pouring PUC material at the bottom of the hollow slabs, the traffic can be restored in a short time. Ultimate bearing capacity was discussed based on the concrete structures. The bending failure mode of concrete reinforced T-beam bridges strengthened with PUC was controlled through PUC design strength. The main construction process was introduced, including concrete surface treatment, supporting template and pouring. To investigate the effectiveness of PUC in strengthening bridges, load tests were conducted before and after the reinforcement. The test results showed that PUC possibly removed the bridge load and increase the stiffness of the hollow slabs. The maximum carrying capacity and stiffness of the main girder were increased by about 20% and 28% after PUC material was poured. Meanwhile, the width of the cracks was reduced in different degrees.
- Subjects
PUBLIC service commissions; CONSTRUCTION slabs; CONCRETE fatigue; REINFORCED concrete; SURFACE preparation; FAILURE mode &; effects analysis; CONCRETE slabs
- Publication
Civil Engineering Journal, 2021, Vol 30, Issue 2, p393
- ISSN
1805-2576
- Publication type
Article
- DOI
10.14311/CEJ.2021.02.0029