RELEVANT CHARACTERISTICS OF THERMOSTABLE ASPHALT REINFORCEMENT GRIDS
Abstract
In the rehabilitation design of flexible pavement with asphalt wearing courseg, one of the potential measures involves the application of thermostable grids for asphalt layer reinforcement. Their use extends the service life of asphalt layers while providing significant economic and environmental benefits. The functional mechanism of these grids is based on a combination of interlock (mechanical adhesion), chemical adhesion, and tensile strength. Numerous technical papers have been published regarding the selection of optimal grid characteristics to maximize their contribution to pavement performance. This paper analyzes the key properties that affect the interaction between the reinforcement grid and the asphalt layer under dynamic loading, as well as relevant laboratory tests - primarily tensile strain elongation (Epsilon 6) and tensile strength reduction after installation. The results of the conducted tests demonstrate measurable performance benefits and provide a reliable assessment behavior of the combined asphalt layer/reinforcement grid system under dynamic loads conditions typical for pavement structures. The analyzed characteristics represent one of the key parameters in the process of rational computing of pavement with the use of reinforcing grids. The conducted analysis may serve as a guideline for designers in selecting an appropriate type of grids for asphalt pavement reinforcement, as well as for investors in defining the terms of reference and requirements in tender documentation.
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