Gap-Graded Concrete for Paving Construction

by Ram Kinkar Ghosh, Head; Rigid Pavement Research Div., Central Road Research Inst., New Delhi, India,
Mukul Ranjan Chatterjee, Scientist; Rigid Pavement Research Div., Central Road Research Inst., New Delhi, India,


Serial Information: Journal of the Construction Division, 1976, Vol. 102, Issue 1, Pg. 227-237


Document Type: Journal Paper

Abstract: Results of a laboratory investigation and a full-scale highway experiment on National Highway No.2 between Delhi and Agra with gap-graded concrete are reported. The findings indicate that good concrete mixes can be prepared with gap-graded coarse aggregate. Gap-graded concrete leads to about 5%-8% economy in the costs of pavement construction. The economy is enhanced to 8%-12%, when coarse sand conforming to the specification costs more than the fine sand and fine sand is blended with the coarse sand to the extent of 20%-50% of the total quantity of fine aggregate. Performance of the experimental gap-graded concrete pavement sections under heavy traffic over a period of 5 yr has been observed to be somewhat superior to that of the section using continuously graded concrete.

Subject Headings: Concrete | Sandy soils | Concrete pavements | Highways and roads | Aggregates | Concrete construction | Coarse-grained soils | Construction costs

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