Severity levels EVALUATION PAVEMENT DISTRESSES USING PAVEMENT CONDITION INDEX - Diponegoro University | Institutional Repository (UNDIP-IR)

23 - Cracks filled with non-display greater than 75 mm surrounded by a badly broken secondary. - Cracks filled with any offer and is surrounded by secondary badly broken Higher level of intensity H: There is in any of the following cases - Cracks filled or not filled surrounded by strongly medium or high of secondary cracks. - Cracks filled with non-display greater than 75 mm. - Cracks introduced about 100 mm and surrounded by volatile badly broken or broken.

c. How to Measure

Measured cracks reflective linear meter intervals, and must record length and level of intensity for each slot. In some cases several different levels of intensity in one sector, in this case must be recorded along the cracks and the level of intensity and intensity of each separately. Measured by the area affected by the defect length of the affected area multiplied by one meter, and the defect density is calculated by dividing the area affected by the total area of the section scanned.

d. Possible causes

Movement is the concrete slab of concrete resulting from the heat and humidity, which in turn reflected on the surface of asphalt pavement is the main cause of reflective cracking joints.

2.3.1.6 Slippage Cracks Sliding Cracks:

a. Description

Slippage cracks are crescent- or half-moon shaped cracks having two ends pointed away from the direction of traffic. see figure 2.8They are produced when braking or turning wheels cause the pavement surface to slide and deform. This usually 24 occurs when there is a low-strength surface mix or poor bond between the surface and next layer of pavement structure. Figure 2.8 Slippage Cracks GTC, 1998

b. Severity levels

Low level of intensity L: the width of cracks less than 10 mm. Medium level of intensity M: you can encounter one of the following ` cases: - Average width of cracks between 11-40 mm. - Break the average in the surrounding area cracks happened to her and or that the region is surrounded by secondary badly broken. Higher level of intensity H: one case occurring - Average width of cracks greater than 40 mm. - The area around the cracks has broken into pieces easy removal.

c. How to Measure