United States Department of Transportation
i
Quantifying Coefficient of Thermal Expansion Values of Typical Hydraulic Cement Concrete Paving Mixtures
-
2008-01-01
[PDF-1.86 MB]
Details:
-
Creators:
-
Corporate Creators:
-
Corporate Contributors:
-
Subject/TRT Terms:
-
Publication/ Report Number:
-
Resource Type:
-
Geographical Coverage:
-
TRIS Online Accession Number:1115144
-
Corporate Publisher:
-
Abstract:A laboratory investigation was conducted to determine the coefficient of thermal expansion (CTE) of a typical MDOT concrete paving mixture made with coarse aggregate from eight different sources. The primary aggregate class included limestone, dolomite, slag, gravel and trap rock. The CTE was determined using the provisional AASHTO TP60 protocol. Three replicate test specimens were fabricated for each mixture-age combination. The test specimens were moist cured for 3, 7, 14, 28, 90, 180, and 365 days prior to testing. The average measured CTE values ranged from 4.51 to 5.92 µε /o F (8.11 to 10.65 µε /o C). The test results indicated that aggregate geology, specimen age at the time of testing and the number of heating-cooling cycles that the specimen is subjected to have a statistically significant (at a confidence level of 95%) impact on the magnitude of measured CTE. Furthermore, the report also discusses the practical (significance) impact of the test variables on the transverse cracking performance of jointed plain concrete pavements.
-
Format:
-
Collection(s):
-
Main Document Checksum:
-
Download URL:
-
File Type:
