Strengthen Method of the Shear Keys in Adjacent Concrete Box-beam Bridges Using High Performance Grouting Material

DOI

10.2991/icmse-16.2016.40How to use a DOI?

Keywords

Box-beam bridge, Shear key, High performance grouting material, Maintenance.

Abstract

Adjacent concrete box-beam bridges are widely used in short and medium span bridges. However, this bridge system has long term durability issues caused by shear key failure and reflective cracking in the upper. This paper investigates a new maintenance method of shear key joint. High performance grouting material with good fluidity, low water-cement ratios, slight expansion, little bleeding and excellent wear ability was used in the repairing process. An adjacent box-beam bridge with 3box-beams was designed and constructed to verify this strengthen approach in the laboratory. A concentrate load was imposed in the mid-span to simulate the vehicle loading. The deformation of box-beam, concrete strain and cracks were tested, then the load-deformation curve and the relative deformation difference were obtained . It was indicated that the mechanical property of the shear key repaired by the high performance grouting material can satisfy the design requirement, and have a greater strength.

Copyright

© 2016, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Fa-Ke Cheng
AU  - Tong-Ning Wang
AU  - Dong-Xu Liu
AU  - Wei-Hong Yan
PY  - 2016/12
DA  - 2016/12
TI  - Strengthen Method of the Shear Keys in Adjacent Concrete Box-beam Bridges Using High Performance Grouting Material
BT  - Proceedings of the 4th 2016 International Conference on Material Science and Engineering (ICMSE 2016)
PB  - Atlantis Press
SP  - 239
EP  - 245
SN  - 2352-5401
UR  - https://doi.org/10.2991/icmse-16.2016.40
DO  - 10.2991/icmse-16.2016.40
ID  - Cheng2016/12
ER  -