THERMAL PROPERTIES OF SOME ASPHALTIC CONCRETE MIXES

To obtain an increased understanding of the energy transfer in asphaltic concrete recycling processes that use surface heat, laboratory tests were carried out on four asphaltic concrete mixes (three having limestone aggregate and one with expanded shale lightweight aggregate) to determine thermal properties. It was found that the thermal conductivity of the three limestone mixes depended on asphalt content and aggregate gradation, but that the conductivity of the lightweight aggregate mixes varied little as the asphalt content was increased from 3.5 to 6.5 percent. The specific heat and diffusivity of the mixes varied with mineralogy and gradation but changed little with asphalt content.

[1]  J. Beck,et al.  Investigation of a New Simple Transient Method of Thermal Property Measurement , 1974 .

[2]  J T Christison,et al.  THE RESPONSE OF ASPHALT PAVEMENTS TO LOW TEMPERATURE CLIMATIC ENVIRONMENTS , 1972 .

[3]  Marshall R Thompson,et al.  A HEAT TRANSFER MODEL FOR EVALUATING FROST ACTION AND TEMPERATURE-RELATED EFFECTS IN MULTILAYERED PAVEMENT SYSTEMS , 1970 .

[4]  H. Carlson,et al.  CALCULATION OF DEPTH OF FREEZING AND THAWING UNDER PAVEMENTS , 1953 .

[5]  David C. Colony,et al.  UNIVERSITY OF TOLEDO TIME-TEMPERATURE MODEL LABORATORY AND FIELD VALIDATION , 1980 .

[6]  Robert C. Deen,et al.  TEMPERATURE DISTRIBUTION WITHIN ASPHALT PAVEMENTS AND ITS RELATIONSHIP TO PAVEMENT DEFLECTION , 1969 .

[7]  C S Cragoe.  Thermal properties of petroleum products , 1929 .

[8]  P F Dickson,et al.  METHODS FOR CALCULATING TEMPERATURE PROFILES OF HOT-MIX ASPHALT CONCRETE AS RELATED TO THE CONSTRUCTION OF ASPHALT PAVEMENTS , 1968 .

[9]  Thomas Norton Rumney.  PAVEMENT TEMPERATURES IN THE SOUTHWEST , 1971 .

[10]  D C Colony,et al.  ASPHALT COOLING RATES: A COMPUTER SIMULATION STUDY , 1976 .

[11]  J S Corlew,et al.  COLD-WEATHER PAVING OF THIN LIFTS OF HOT-MIXED ASPHALT ON PREHEATED ASPHALT BASE , 1972 .

[12]  E. J. Yoder.  Principles of Pavement Design , 1959 .

[13]  L Carmichael,et al.  MODELING HEATER TECHNIQUES FOR IN-PLACE RECYCLING OF ASPHALT PAVEMENTS , 1977 .

[14]  Arthur L Straub,et al.  BITUMINOUS PAVEMENT TEMPERATURE RELATED TO CLIMATE , 1968 .

[15]  E O Hovey,et al.  Geological Society of America , 1922, Nature.

[16]  R. W. Goranson.  Heat Capacity; Heat of Fusion , 1942 .

[17]  James V. Beck,et al.  Thermal property estimation utilizing the Laplace transform with application to asphaltic pavement , 1977 .

[18]  P F Dickson,et al.  COMPUTER ANALYSIS FOR MODIFICATION OF BASE ENVIRONMENTAL CONDITIONS TO PERMIT COLD WEATHER PAVING , 1971 .