As mentioned in previous articles, crack sealing machine is used for repair the crack, however, the width of carcks open and close different in different temperature situation. As a result, it will apply different method to repair by sealing or filling.
In order to make decision on whether to choose seal or fill a crack, it is necessary to established whether the crack is working or non-working and whether the crack undergoes horizontal or vertical movement. The total level of crack movement within a year is the main determinant of whether the fracture is a working fracture or a non-cracked fracture.
In addition, the width of the crack plays an important roal in deciding whether it is a working or non-working cracks. Crack sealing is always applied when the crack width exceeds 6mm. Crack sealing machine produced by Shanghai Doan Company can seal the crack with more than 6mm. Also, the type of the crack can provide an indication of whether it is a working crack or not. Working cracks can be transverse or longitudinal to the pavement, but working cracks with limited edge deterioration should be sealed, rather than filled.
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