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Influence of low-temperature physical hardening on stiffness and tensile strength of asphalt concrete and stone mastic asphalt

Abstract

This paper presents laboratory testing of stiffness modulus and indirect tensile strength of three asphalt concrete (AC) and three stone mastic asphalt (SMA) mixes after isothermal storage at temperature of -20oC, at different time intervals up to 16 days. The tests under repeated dynamic loading showed physical hardening of all tested mixes which was manifested by an evident increase of their stiffness moduli after isothermal storage. Contrary to expectations, the tests on all mixes did not show any evident changes of the indirect tensile strengths which after isothermal storage remained almost constant, within normal scatter range. The differences in the physical hardening of asphalt concrete AC and stone mastic asphalt SMA were found. At the beginning of isothermal storage at -20oC the physical hardening was slower for the SMA. After 5–16 days of storage the SMA showed greater physical hardening than the asphalt concrete AC. Two measures which allowed the quantification of intensity of the physical hardening were introduced.

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Category:
Articles
Type:
artykuł w czasopiśmie wyróżnionym w JCR
Published in:
CONSTRUCTION AND BUILDING MATERIALS pages 191 - 199,
ISSN: 0950-0618
Language:
English
Publication year:
2014
Bibliographic description:
Judycki J.: Influence of low-temperature physical hardening on stiffness and tensile strength of asphalt concrete and stone mastic asphalt// CONSTRUCTION AND BUILDING MATERIALS. -, nr. 61 (2014), s.191-199
DOI:
Digital Object Identifier (open in new tab) 10.1016/j.conbuildmat.2014.03.011
Verified by:
Gdańsk University of Technology

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