The analysis revealed that crack sealed pavements, in general, performed better than the control sections on a 5-year cycle. Regardless of pavement type, aggregate type used in the surface layer, and the prior pavement condition, crack sealing always results in performance gain. Maximum performance gain can be achieved by treating pavements with Pavement Condition Rating ranging from 66 to 80. The performance prediction models indicate crack sealing treatment can extend the service life of pavements by up to 3.6 years. The cost analysis using a common metric such as the Net Present Value illustrates that crack sealing, as a maintenance strategy, is economically viable for pavements in the prior pavement condition rating range of 66 to 70.
From a practical point of view, it is hereby recommended that Doan develops a policy to allow crack sealing as a strategy for pavement preventive maintenance for all pavements in the prior pavement condition rating range of 66 to 80. Shanghai Doan Machinery Technology Co.,Ltd.is a leading company engaged in manufacturing and exporting highly efficient road construction machines and equipment.
