Different Methodologies for Repair of Cracks in PQC in Concrete Pavements
Dr. Yash. P. Gupta, Technical Advisor, COWI - DIPL Consortium, Naini Bridge Project, Allahabad, India And (Ex) Material Consultant Allahabad By Pass Project, Allahabad
Large scale construction of Bridges & Highways is going on in India and World over. They are mostly made as rigid pavements using Pavement Quality Concrete (PQC). On one hand, concrete is a very good and strong material, but it develops cracks due to temperature, shrinkage, creep etc. Until unless enough precautions are taken, some cracks do come up on concrete surface. Prominent cracks should be repaired for better performance and longer life of Highways/pavements. To repair these cracks, several materials and procedure have been developed. The efficiency of these materials and procedures depend on the type of crack, weather conditions and applicator efficiency.
In this paper various procedures of crack repair are described. However, any procedure in general should be first tried on pilot basis and then depending upon its success, repairing of cracks be done at site. A procedure of injecting low viscosity Epoxy Material is an excellent material. It is discussed here and can be used for the repair of cracks.
