Asphalt Maintenance Importance
Water is one of the most damaging elements. Water when frozen expands in volume and becomes one of the strongest forces in nature. The problem with water collecting in the pores and cracks of asphalt is that the surface freezes first forcing the ice to move downward. This in turn will cause deep cracking of the asphalt down to the subgrade. This will soften and destroy the integrity of the subgrade which will lead to further deterioration of the asphalt surface. If water is continually allowed to penetrate the surface, the effect of the freeze/thaw cycle will destroy asphalt in a short amount of time. Asphalt is elastic in nature and must be this way due to the expansion and contraction caused by the heat from the sun. Asphalt being black in color, absorbs heat from the sun very efficiently. If the asphalt is left unprotected, the surface dries out and becomes brittle which will lead to cracking and alligatoring. This also will lead to premature failure of the asphalt.