Development of Procedures for Replacing Joints in Concrete Pavement.

摘要

The performance of precast and cast-in-place slabs used for repair of concrete pavements is described. The development of the repair procedures was discussed in an interim, MDSHT Report No. R-968,August 1975. Briefly,the procedures require full-depth diamond blade sawing of the repair limits,removal of the distressed concrete area without disturbing the existing base,placement of the slab,and installation of sealed joints between new and old slabs. A previously sawed concrete area,up to 10ft long,and one lane wide,can be replaced with a precast slab and opened to traffic in about 1-1/2hours. A similar size area can be repaired with fast-set concrete and opened to traffic in 6to 8hours. Evaluation of the performance of the repairs indicates that both repair types will perform reasonably well for at least 5years and it is expected that the majority of the repairs will continue to give good service for 10years. Some faulting develops at the joints,but deflection at the joints under load,and slab rocking,do not appear to have any serious effect on the performance of the repairs.