Recent Trend of Transverse Prestressing Technology in the Concrete Slab of Highway Bridges
By S. Ikeda, T. Kadotani and K. Hirai
Concrete Journal, Vol.47, No.12, Dec. 2009
- Synopsis
- Technical development with regard to concrete deck slab of highway bridges so far was firstly reviewed with emphasis on the durability against inherent severe loadings and environmental condition of a deck slab. Then, the recent trend and the significat effect of transverse prestressing in concrete slabs was described including the use of pre-grouted prestressing strands by means of delayed-hardening epoxy resin although urgent problems had been reported relating to the hardening process of the resin, etc.. To solve the problems, development and utilization of Multi-unbonded epoxy-coated strand cable for the use in transverse prestressing were proposed and discussed according to experimental results.
- Keywords:
- transverse prestressing, concrete slab, pre-grouted prestressing strand, multi-unbonded epoxy-coated strand cable, delayed-hardening epoxy resin, strand with individually epoxy-coated wires, durability
