Larger Sized Coarse Aggregate in Portland Cement Concrete Pavement and Structures

Date Started: May 1, 2002

Date Ended: 2006-09-01 00:00:00.0

Budget: $150,000

Sponsor: Ohio Department of Transportation

Performing Organization: University of Cincinnati

Description: Given that the efficiency of an optimum concrete mix is controlled by the amount of cement employed and that the paste is usually responsible for most of the durability and cracking problems encountered, the goal of this research will be to see if the cement efficiency of standard ODOT mixes can be improved through the use of larger aggregate. The project will seek to develop and validate mechanistic-based correlations to assess and quantify the influence of aggregate size on strength, chloride resistance, abrasion resistance, freeze thaw resistance, creep and shrinkage. The effect of aggregate size on curling, warping, cracking and load transfer will also be considered.