Use of reinforced asphalt concrete in road maintenance (VSS2007/702)
Overview
Background & policy context:
Recently, different methods of reinforcement have been used to repair asphalt pavements with the aim of reducing costs and increasing the time between routine maintenance. The results from the first Swiss studies have shown that the use of reinforcements in asphalt pavements as a maintenance measure is not always successful. Long term performance evaluations are not available and the specific features of different reinforcements are not well known.
Objectives:
This pilot study aimed to summarise the state-of-the-art of experience and knowledge regarding national and international applications of reinforcement for asphalt maintenance. First, conclusions for the application of reinforcement in asphalt maintenance in Switzerland were sought; where possible, providing recommendations as well identifying gaps in existing knowledge.
Methodology:
The methodology comprised undertaking a broad literature review to develop a basic understanding of asphalt reinforcement (term systematization, design methods, summary of decisive parameters such as material, function and various building structures).
Further research was carried out to validate accelerated in situ traffic load simulation (Accelerated Pavement Testing - APT) tools. There is a definition of requirements and constraints for implementing an advanced research. This concerns, among other things:
- The number and size of to be examined test tracks;
- Testing and evaluation program of test tracks (Accelerated in situ traffic load simulation APT);
- Construction of structures to be examined;
- Explanation of the variables to be examined and their evaluation standards;
- Demands on the cooperation of the Research Centre, exporting company and manufacturer of grid interlayers and road operators.
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