Summary and Discussion EVALUATION PAVEMENT DISTRESSES USING PAVEMENT CONDITION INDEX - Diponegoro University | Institutional Repository (UNDIP-IR)

89 Table 4.5 Distresses types for flexible pavement 1 AlligatorFatigue cracking 2 Bleeding 3 Block cracking 4 Bumps and sags 5 Corrugation 6 Depression 7 Edge cracking 8 Reflection cracking 9 Lane shoulder drop 10 Longitudinal Transverse 11 Patching Utility patch 12 Polished Aggregate 13 Potholes 14 Rutting 15 Railroad crossing 16 Shoving 17 Slippage 18 Swell 19 Raveling Weathering Figure 4.10 shows the types of distresses and severity levels in each part. From visual inspection of the road, there is more than defect. Seven distresses are observed and quantified for a 10-samples pavement unit, almost of them are alligator cracking with low, medium and high severity, block cracking with low medium and high severity, longitudinal transverse cracking with low and medium severity, patching with low and medium severity, polished aggregate, potholes with low and medium severity and weathering raveling with medium severity. 90 1 L 1M 1L 1M 1L 1M 1L 1H 1M 10L 3L 3 H 10L 10M 3M 10M 3H 11L 10M 11L 10L 10M 12 13L 11L 13M 13 M 13L 19M 1 2 3 4 5 1L 1M 1L 1M 3L 1L 1M 1L 1M 3L 1L 1M 1H 10L 10M 3M 10L 10M 3L 3M 3M 10L 3L 3M 11L 13L 11M 12 10M 13L 10M 19M 3H 10M 6 7 8 9 10 Figure 4.10 Sketch for the sample unit All types of maintenance are needed in a comprehensive pavement. Pavement maintenance describes all the methods and techniques used to prolong pavement life by slowing its deterioration rate. The performance of a pavement is directly tied to the timing, type and quality of the maintenance it receives.

4.7 Estimation of the maintenance options

According to PCI finding and Figure 2.21, the pavement that has been studied at Koums area would seem to require maintenance. Thick overlay sometimes called surface treating is needed in a comprehensive pavement. The Overlays will perform one or more of the following functions: 1. Improve ride quality. 2. Correct minor surface defects. 100 m 8 m 91 3. Provide a skid resistant surface. 4. Fill distortions or rutting. 5. Improve safety characteristics such as skid resistance and drainage. 6. Reduce road-tire noise. Therefore, thick overlay is considered for rehabilitation, although it typically have some maintenance-type benefits as well.