01519143

Component

A high load transfer efficiency (LTE) across the joints and cracks is critical for the performance of a concrete pavement. An important factor affecting the LTE of joints and cracks is the aggregate interlock mechanism. This mechanism is controlled by the crack width and the surface texture of the cracked face. This surface texture is influenced by concrete properties such as water-to-cement ratio, and coarse aggregate characteristics. The objective of this study was to develop a relationship between key concrete mixture properties and the surface texture of the cracked faces. The surface texture of different concrete mixtures was quantified in the laboratory using a method called Volumetric Surface Texture (VST) test. These results were supplemented with laboratory and field data from previous studies, and a regression analysis was performed. As a result, an empirical model relating the critical concrete properties and the surface texture of the transverse joints/cracks was created.

This paper was sponsored by TRB committee AFN20 Properties of Concrete.

01503729

14-5392

English

27p

2014

Transportation Research Board 93rd Annual Meeting

Digital/other

Figures; Photos; References; Tables

Admixtures; Coarse aggregates; Concrete pavements; Load transfer; Regression analysis; Texture; Transverse cracking; Transverse joints; Water cement ratio

Highways; Pavements; I22: Design of Pavements, Railways and Guideways

Transportation Research Board Annual Meeting 2014 Paper #14-5392

TRIS, TRB, ATRI

Jan 27 2014 3:53PM