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EVALUATION — Cracks 7 <br /> V Widely spaced,well-sealed cracks. <br /> Transverse cracks <br /> A crack at approximately right angles <br /> to the center line is a transverse crack. <br /> They are often regularly spaced. The <br /> cause is movement due to tempera- <br /> - ture changes and hardening of the <br /> asphalt with aging. <br /> Transverse cracks will initially be <br /> widely spaced (over 50'). Additional <br /> cracking will occur with aging until <br /> they are closely spaced (within several <br /> feet). These usually begin as hairline or <br /> '-- . very narrow cracks; with aging they <br /> widen. If not properly sealed and <br /> ' maintained, secondary or multiple <br /> cracks develop parallel to the initial <br /> crack. The crack edges can further <br /> deteriorate by raveling and eroding <br /> '�` the adjacent pavement. <br /> Prevent water intrusion and damage <br /> by sealing cracks which are more <br /> than 1/4" wide. <br /> Sealed cracks, <br /> . $ a few feet <br /> m apart. <br /> F. <br /> � . . <br /> •9; <br /> T' <br /> yy <br /> r <br /> I <br /> ♦ Tight cracks less ♦ Open crack— or ♦ Water enters unsealed ♦ Pavement ravels and erodes <br /> than 1/4" in width. more in width. cracks softening along open cracks causing <br /> pavement and causing deterioration. <br /> secondary cracks. <br />