In:
Transportation Research Record: Journal of the Transportation Research Board, SAGE Publications, Vol. 2210, No. 1 ( 2011-01), p. 30-36
Abstract:
The fracture characteristics of semirigid asphalt concrete (SRAC) prepared from a highly porous asphalt mixture (matrix) with 18% to 22% air voids and cement paste were evaluated. Two asphalt binders and several polymer-modified cement pastes that were grouted into the porous matrix were used. The SRAC beam specimen was prepared, and an initial notch was made by cutting with a saw at the bottom center of each beam for the static three-point bending (3PB) test at low temperatures (10°C, 0°C, and −10°C). Fracture toughness (K IC ) was calculated with 3PB test data to examine the fracture resistance of the SRAC. The two SRAC binders, a normal asphalt (PG 64-22) and a polymer-modified asphalt (PG 76-22), exhibited significant differences in K IC values within the temperature and the paste type. The SRAC using PG 76-22 showed K IC values 17% higher than the SRAC using PG 64-22 at −10°C. Therefore, the SRAC using PG 76-22 binder is expected to have better low-temperature fracture resistance than the SRAC using PG 64-22 binder in the region where the low temperature commonly reaches −10°C.
Type of Medium:
Online Resource
ISSN:
0361-1981
,
2169-4052
Language:
English
Publisher:
SAGE Publications
Publication Date:
2011
detail.hit.zdb_id:
2403378-9
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