Material Selection for Concrete Overlay



1.1 Research Background

Chapter 1. Introduction

The infrastructure of the state of Texas is in poor condition, and in the 2011 Texas Infrastructure Report Card Update, the state’s roads and bridges were give a grade of D. However, increases in the expected capacity of the state roads will put an enormous demand on the transportation infrastructure. Thus, it is important that roadway constructed repairs are done quickly so that traffic congestion in minimized. Portland cement concrete overlays (herein referred to as concrete overlays) constructed on top of existing concrete pavement or asphalt concrete pavement are cost-effective rehabilitation strategies. Concrete overlays are simply an additional layer of concrete placed on top of existing pavements to increase the load bearing and serviceability capacity. When properly constructed, overlays provide an optimum utilization of the qualities of the existing pavement, by increasing the structural capacity, improving the durability, and providing increased serviceability.


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