Quality Control In Road Construction And Maintenance:
No Thumbnail Available
Roads are built to provide safe passage of vehicles. They must be properly designed and constructed. After construction, roads deteriorate with age as a result of use and therefore, they need to be maintained to ensure that the objective of safety, strength and durability are met. The rate at which roads deteriorate in service depends on the quality of materials used, workmanship standard and the quality of supervision during the road construction. If roads are not maintained, functional defects will degenerate to structural defects that will require rehabilitation or reconstruction. The objective of quality control in road construction and maintenance is to achieve a well built pavement that conforms to the required horizontal and vertical profiles, design thicknesses of different courses (earthwork, sub-base, base and surface) and stipulated standards of riding quality. At each stage of construction or maintenance operations, quality control is required during the preliminary design, source acceptance, job-mix and construction. Relevant quality control tests should be carried out on construction materials. The plants and equipment must be of good quality and must be consistent with the type of job to be done. Effective supervision of construction or maintenance works as well as plants and equipment by qualified engineers is the key to the achievement of the overall objective of quality control. Engineers are to ensure that contractors comply with all the project specifications. Effective quality control leads to reduction in the cost of construction and maintenance, lowers cost of vehicles operation, transportation and maintenance. It is recommended that the option of preventive maintenance of our roads rather than reactive maintenance should be urgently embraced because preventive maintenance results in prolonged service life of roads and significant savings for the government.
Quality Control , Maintenance
Quality Control In Road Construction And Maintenance: Practical Approach. Being a Paper Presented At The Proceedings Of National Conference On Road Pavemet Failure In Nigeria Abuja. P. 33 - 55.