IRI incremental equations for jointed plain concrete pavements

Abstract

This paper presents a study of the relationships between increments of distress and IRI by using both simulation analysis and empirical regression. The simulation analysis permitted to verify the linear relationship between IRI, cumulative faulting and quantity of spalled joints of medium and high severity, and this was also validated by the empirical models obtained by statistical regression. Additional effects due to age of the pavement and incidence of deterioration of existing cracks are considered in the model finally proposed, which does not need the value of initial IRI after construction to be used in pavement management systems.