Sulfur Polymer Emulsion 및 보강용 섬유를 활용한 반강성 포장재의 공학적 특성

Abstract

The application of sulfur polymer emulsion (SPE) as an acrylate substitute for semi-rigid pavement grout was evaluated, and theperformance improvement by employing PVA fibers were also evaluated. The result indicated that the filling ratio of semi-rigidpavement material decreased as the fiber content increased, but it was measured to be 92~94% in every mixing condition, whichsatisfies the target performance, 90%. The maximum Marshall stability value of semi-rigid pavement material was measured to be25.4 kN, which is about 4.7 times higher than the Korean Standard required for semi-rigid pavement material, 5.0 kN. Thedynamic stability evaluation of semi-rigid pavement material indicated that the resistance to deformation from the wheel trackingtest was improved by an SPE substitution, and in every mixing condition, the deformation converged to a constant value after 45minutes with the same dynamic stability of 31,500 times/mm. The strain at the flexural failure was about 0.53%, which showssuperior rigidity to asphalt pavements. The examination of abrasion resistance and impact resistance showed that the loss ratio was9.8~6.0% in every mixing condition, which indicates a good abrasion resistance. Also, when fiber content ratio was 0.3%, theimpact resistance was 2.82 times higher compared to plain (i.e., when fibers were not added). In the limited range of this study,an SPE substitution ratio of 30% was found to be an optimal level considering the mechanical and durability performance. Inaddition, it is thought that semi-rigid pavement material with superior performance could be manufactured if fiber content ratio upto 0.3% is applied depending on the purpose of use.