Title:
Drying Shrinkage of Roller-Compacted Concrete for Pavement Applications
Author(s):
David W. Pittman and Steven A. Ragan
Publication:
Materials Journal
Volume:
95
Issue:
1
Appears on pages(s):
19-26
Keywords:
aggregate grading; concrete pavement cracking; drying shrinkage; optimum
moisture content; roller-compacted concrete pavements;
DOI:
10.14359/348
Date:
1/1/1998
Abstract:
This paper reports the results of a laboratory investigation of the drying shrinkage of roller-compacted concrete for pavement applications. The aggregate grading and moisture content of nine RCC mixtures were varied, and the drying shrinkage measured according to the procedures described in ASTM C 157, with some modifications. The 28-day drying shrinkage results of the mixtures ranged from 8 to 33 x 10-5, with an overall average of 15 x 10-5. The combined effects of moisture content and aggregate grading on the drying shrinkage were statistically significant, while the individual effects of moisture content or aggregate grading were not statistically significant. A regression model for predicting the 28-day drying shrinkage of RCC from the relative aggregate grading and moisture content was developed from the data, with a multiple correlation coefficient of 67 percent. The ACI Committee 209 model for predicting the drying shrinkage of concrete with time compared favorably with the RCC drying shrinkage data.