Development of Procedures for Replacing Joints in Concrete Pavement.

摘要

Two types of concrete pavement repair procedures were developed;pre-cast slab repairs and cast-in-place repairs,both requiring full-depth sawing of the repair limits,removal of the distressed concrete without disruption of the base,and installing sealed joints at the end limits. A one-lane,previously sawed area,up to 12-ft long,can be replaced with a precast slab and opened to traffic in about 1-1/2hours; a cast-in-place repair;using fast-set concrete in 6to 8hours. Although doweled joints were used on a few installations,the report describes the difficulties encountered with using them on a production basis,and undoweled joints have been used on most of the repairs. To date,repairs equivalent to approximately 7lane miles of pavement have been made. No specific repair recommendations are made,since evaluation of the repairs is not complete. An Appendix,containing a step-by-step repair procedure,current Michigan Specifications,and various plans,is included.