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1.
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THE PAVEMENT'S SURFACE TEMPERATURE AT 135° AND ITS BOTTOM TEMPERATURE AT 100° CAUSES
PAVEMENT TENSION.
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2.
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THE SURFACE OF THE PAVEMENT EXPANDS AND CONTRACTS GREATER THAT THE BOTTOM, CAUSING THE CRACK TO
PENETRATE DOWNWARD.
(Chack sealant should be applied at this stage)
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3.
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IF SEALANT IS NOT APPLIED, WATER PENETRATION OCCURS, THE BASE IS SOFTENED AND THE PAVEMENT LOSES
ITS SUPPORT.
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4.
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VEHICLE LOAD COMPRESSES ASPHALT DOWNWARD CAUSING WATER EROSION TO THE BASE.
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5.
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LOAD CHANGE INCREASES THE EROSION PROCESS.
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6.
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EROSION AND WATER EVAPORATION STRIP AWAY SUPPORT FROM UNDERNEATH THE PAVEMENT; THIS CAUSES STRESS
POINTS.
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7.
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LOAD BEARING VEHICLES STRESS THE PAVEMENT BEYOND ITS CAPACITY, WHICH CAUSES ASPHALT FAILURE OR
"ALLIGATORING".
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8.
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CRACK SEALING SHOULD TAKE PLACE AT STAGE 2, BEFORE WATER PENETRATION CAN OCCUR.
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9.
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ROADWORKS #306 RUBBER SEALANT IS RECOMMENDED FOR CRACKS CAUSED BY THERMAL STRESS.
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