Community Insider Winter 2017 - Page 30

WHY IS MY ASPHALT PAVEMENT FAILING? ASPHALT PRESERVATION AND PREVENTATIVE MAINTENANCE TIPS By: Bryan Holder A s a Property Manager, you may always continue to ask the same question when assessing the condition of your streets and parking lots, and that question is: “What is causing the asphalt pavement to fail?” Now, assuming that the initial asphalt pavement was designed and constructed properly, the primary cause of failure is the penetration of water into the asphalt base (sub-grade or native soils). As soon as freshly laid hot asphalt begins to cool, the aging process also begins. This process begins with the breakdown of asphalt by elements such as oil, gas, salt, and sun oxidation of the pavement surface which causes the asphalt to dry and become brittle. This then leads to the erosion of the top layer of fine particles a H\X\[Hق\\ۙ\[X[ܘX›ۈH\XKYY[X]Y \HܘXܛݙ\[YB[][X[H[]\œ[]]HH\HوB][Y[ []\[\H\HوH][Y[B\HX]\X[[ݙ\[]\›XY[\\ܘX[[['[Y]܈\X\[x'Hݙ\[YKSQQSUSUHSQTST MB[H][Y[XX\\YKHۛH[ۈ\[[ݘ[[\X[Y[وH\[ \[XYH[H\HZ[[][Bݙ\[YHYH\\[XZ[[[H\Y \H\HYH[[[ܛX]]H\][\\[H[XZ[X\[ۜY\[][]]HXZ[[[Hۈ[\Y]˜[\[\X\ˈXZH\H\Y[H[X[\][Y[\X\ۈHY[\\\܈ܘXY[][Y[X\[[\YۜوZ[\\܈XX[]H\Y\ˈ\][[ۈܘX[][؛[\HXY[[XHHYHوH][Y[ [[\ܘX]\H]Y[0[YH[0H[Y\\H[Y]\܈8'ܘXX[[˸'H][]\\X\ۈH\[\Bٝ[Y\Y\8'\]'H[][[H^Y\ۈ\^B\X\[\[H[Hو]\Y\[YH\H[XZ[HKX[][HY][\[[[ۈB][Y[]\[ܘ][ۈ\ˈX[]\\YۙYX\H[H\[][HY][ۈ[\[ۈوH^Y\قH][Y[ X[][[X[HX[ܘX][\[›\HܘX][[]\HY\[ۈ[H\H[H\[ ܈\\\X\X\[Y]܈\[]]BY[ݙ\ZY]]\[ X[][[H\YY  LːRKT ԑ