OPTIMISATION OF NON-SKID CHARACTERISTICS IN CONSTRUCTION OF CONCRETE PAVEMENTS

Abstract

This study focuses on optimizing the non-skid characteristics of concrete pavements to enhance road safety and durability. Initially, burlap was drawn over fresh concrete to create surface friction by exposing sand grain ridges, providing micro-roughness. However, this method didn't ensure water drainage, posing aquaplaning risks. Thus, scoring with a broom was introduced in 1966 to add macro-roughness by creating larger bumps, significantly improving grip. Over time, the effectiveness of these surface treatments decreased due to traffic wear, leading to the exploration of new techniques to maintain roughness. This research delves into the evolution of surface concrete roughness under traffic effects, highlighting the necessity for both micro and macro-roughness for effective skid resistance and water drainage. The study then explores innovative methods, such as molding deep grooving and enhancing surface wear resistance, to achieve durable and safe pavement surfaces. Studding with very hard fine gravel was identified as an effective approach to ensure surface longevity and non-skid properties. The process involves gauging, distributing, and embedding hard aggregates into the surface mortar under supervised conditions, followed by a detailed examination of stripping techniques to further enhance surface quality without compromising the concrete's integrity. Results from applying these techniques in France show significant improvements in pavement roughness and durability. The study concludes with a comparison of the non-skid characteristics and noise levels of treated pavements, demonstrating the efficacy of these optimized construction methods for concrete pavements. (Abstract generated by AI tool ChatGPT 4)