EFFECTS OF TIME AND TEMPERATURE ON HARDENING OF ASPHALTS
FIGURES ARE PRESENTED WHICH SHOW THE EFFECTS OF MIXING TIME AND TEMPERATURE ON THE PENETRATION OF THE RECOVERED ASPHALT. MOST STUDIES OF ASPHALT HARDENING INVOLVE THE RECOVERING OF THE ASPHALT FROM THE PAVING MIXTURE AND THE MIXING OF PENETRATION TESTS. SINCE THERE IS CONSIDERABLE QUESTION WHETHER A DROP IN PENETRATION NECESSARILY IMPLIES A CORRESPONDING LOSS IN QUALITY, CALIFORNIA HAS DEVELOPED AN ABRASION TYPE OF TEST WHICH IS INTENDED TO EVALUATE BRITTLENESS. IT CAN BE SHOWN THAT TWO ASPHALTS OF THE SAME PENETRATION MAY VARY CONSIDERABLY IN BRITTLENESS AS REPRESENTED BY THE LOSS UNDER AN ABRASION TYPE OF TEST. TEST RESULTS PRESENTED SHOW THAT THE RATE OF HARDENING UNDER ATMOSPHERIC TEMPERATURES AFTER MIXING IS VIRTUALLY UNAFFECTED BY THE AMOUNT OF HARDENING DEVELOPED DURING THE MIXING CYCLE. ALL THE STUDIES HAVE CONFIRMED THE EVIDENCE THAT THERE IS NO FIXED RELATIONSHIP BETWEEN THE SUSCEPTIBILITY OF ASPHALTS IN THE MIXER AT HIGH TEMPERATURES AND THE CHANGES THAT TAKE PLACE ON THE ROAD AT ATMOSPHERIC TEMPERATURES.
- Record URL:
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Supplemental Notes:
- pp 13-18, 5 FIG
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Corporate Authors:
Highway Research Board (HRB)
Washington, DC -
Authors:
- Hveem, F N
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Conference:
- 38th Annual Meeting of the Highway Research Board
- Location: Washington DC, United States
- Date: 1959-1-5 to 1959-1-9
- Publication Date: 1960
Media Info
- Media Type: Digital/other
- Monograph Title: Temperature in bituminous mixtures
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Serial:
- Highway Research Board Special Report
- Issue Number: 54
- Publisher: Highway Research Board
Subject/Index Terms
- TRT Terms: Abrasion tests; Asphalt hardening; Brittleness; High temperature; Mixing; Pendulum tests; Temperature; Time
- Old TRIS Terms: Mixing temperature; Mixing time
- Subject Areas: Highways; Materials;
Filing Info
- Accession Number: 00211420
- Record Type: Publication
- Files: TRIS, TRB
- Created Date: Aug 25 1994 12:00AM