摘要: |
The purpose of maintenance is to ensure that the pavements and structures remain serviceable throughout its design life. Maintenance prolongs their life by reducing the rate of deterioration, thereby safeguarding investments in repair and rehabilitation, which will lower the cost of operating vehicles by providing a smooth-running surface, keeps the road open for traffic with least delay, contributes to better transport services, sustains social and economic/ toll benefits due to improved road and structures access. Deterioration depends on original design, material types, construction quality, loads, geometry, age, environmental conditions and preservation policy selected. The paper covers innovative scenario of roads and structures maintenance and consequently innovative repair methodologies covering the respective deterioration/defects. The major innovative techniques are use of modern low viscosity epoxy resins, pressure grouting techniques, jacketing with concrete or steel/ fibre reinforced polymer plates, cross stitching of long cracks, repair of patches/pot holes, edge spall, blowups, raveled/smooth surface, bearing and expansion joints repairing, widening of structures etc. in case of concrete road and structures; and further innovative techniques for rectification of stripping, showing, streaking, rutting, raveled surface, smooth surfaces etc of asphalt pavements mainly liquid seal, slurry seal, micro-surfacing with modified bitumen emulsion using latex, prefabricated mastic rolls made with different types of fibres, cold mix technology etc. |