CORRELATION OF LOW TEMPERATURE TESTS WITH RESISTANCE TO CRACKING OF SHEET ASPHALT PAVEMENTS

CERTAIN PHYSICAL PROPERTIES OF SHEET ASPHALT PAVING MIXTURES AS DETERMINED BY LOW TEMPERATURE LABORATORY TESTS WITH RESISTANCE TO CRACKING OF SHEET ASPHALT PAVEMENTS WERE INVESTIGATED. SAMPLES OF 2 SHEET ASPHALT PAVEMENTS WERE TESTED TO DETERMINE PHYSICAL CHARACTERISTICS OF THE MISTURES, PARTICULARLY AT LOW TEMPERATURES. ONE OF THESE PAVEMENTS IS IN GOOD CONDITION, WHILE THE OTHER PAVEMENT HAS CRACKED A GREAT DEAL. TEST RESULTS, PARTICULARLY MODULUS OF RUPTURE, INDICATE THAT THE ONE PAVEMENT HAS PROPERTIES TENDING TO RESIST CRACKING, BUT THE OTHER PAVEMENT HAS LOW RESISTANCE TO CRACKING. THE FOLLOWING CONCLUSIONS ARE REACHED OF PHYSICAL PROPERTIES OF HOT-MIX SHEET ASPHALT PAVING MIXTURES: (1) THE MODULUS OF RUPTURE AND THE MODULUS OF ELASTICITY ARE MEASURES OF THE RESISTANCE TO CRACKING OF SHEET ASPHALT PAVING MIXTURES, (2) TOUGHNESS OF A PAVING MIXTURE AT LOW TEMPERATURE IS A MEASURE OF THE RESISTANCE TO IMPACT AND MAY BE USED AS A CONTROL TEST TO EVALUATE MIXTURES WITH RESPECT TO THEIR ABILITY TO WITHSTAND THE ACTION OF TRAFFIC AT LOW TEMPERATURES, (3) AN ASPHALT PAVING MIXTURE SHOULD NOT BE DESIGNED TO HAVE GREAT RESISTANCE TO DISPLACEMENT AS MEASURED BY STABILITY TESTS WITHOUT CONSIDERATION OF THE RESISTANCE TO CRACKING OF THE MIXTURE, PARTICULARLY IF THE MIXTURE IS TO BE LAID IN LOCALITIES WHICH HAVE COLD WINTERS, (4) IT WOULD APPEAR THAT THOSE MIXTURES CONTAINING THE HIGHEST PENETRATION ASPHALT CONSISTENT WITH NECESSARY STABILITY SHOULD PROVE MOST RESISTANT TO CRACKING AT LOW TEMPERATURES, AND (5) THE IMPORTANCE OF PROPER CONTROL OF PLANT AND STREET CONSTRUCTION OPERATIONS TO INSURE PROPERLY PROPORTIONED AND WELL COMPACTED MIXTURES OF UNIFORM DENSITY AND TO PREVENT GREAT ALTERATIONS IN CHARACTERISTICS OF THE ASPHALT CEMENT SHOULD BE EMPHASIZED.

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Filing Info

  • Accession Number: 00210845
  • Record Type: Publication
  • Files: TRIS
  • Created Date: May 6 1994 12:00AM