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Behavior of a Porous Asphalt Mixture Modified with Gilsonite


Affiliations
1 Universidad Distrital Francisco Jose de Caldas, Bogota DC., Colombia
2 Universidad Militar Nueva Granada, Programade Ingeniería Civil, Bogota, DC, Colombia
3 Universidad Nacional de Colombia – Sede Manizales. Departamento de Ingeniería Civil. Cra 27 # 64-60, Manizales, 170004, Colombia
 

Objectives: The study presents the experimental results of testing an MD-1 porous asphalt mixture modified by wet and dry process with a natural asphalt type Gilsonite (G) from Cesar (Colombia). Methods/Analysis: For the preparation of the mixtures, an Asphalt Cement (AC) type AC 60-70 (PG 64-22) was used. For the evaluation of the resistance to abrasion and monotonic load of the control mixtures (without Gilsonite) and modified, the Cantabro and Marshall tests were used, respectively. Findings: We report a remarkable increase in the stiffness under monotonic load and in the resistance to abrasion when a ratio of Gilsonite and AC of G/AC=10% is used. Application/Improvement: Gilsonite can be used to improve resistant to abrasion and cohesion properties (increasing stiff and monotonic mechanical resistance) of porous asphalt mixtures which are used in pavements to improve wet-weather visibility and friction, tire spray, hydroplaning, storm water management and skid resistance.
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  • Behavior of a Porous Asphalt Mixture Modified with Gilsonite

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Authors

Hugo Alexander Rondon-Quintana
Universidad Distrital Francisco Jose de Caldas, Bogota DC., Colombia
Saieth Chaves-Pabon
Universidad Militar Nueva Granada, Programade Ingeniería Civil, Bogota, DC, Colombia
Diego A. Escobar
Universidad Nacional de Colombia – Sede Manizales. Departamento de Ingeniería Civil. Cra 27 # 64-60, Manizales, 170004, Colombia

Abstract


Objectives: The study presents the experimental results of testing an MD-1 porous asphalt mixture modified by wet and dry process with a natural asphalt type Gilsonite (G) from Cesar (Colombia). Methods/Analysis: For the preparation of the mixtures, an Asphalt Cement (AC) type AC 60-70 (PG 64-22) was used. For the evaluation of the resistance to abrasion and monotonic load of the control mixtures (without Gilsonite) and modified, the Cantabro and Marshall tests were used, respectively. Findings: We report a remarkable increase in the stiffness under monotonic load and in the resistance to abrasion when a ratio of Gilsonite and AC of G/AC=10% is used. Application/Improvement: Gilsonite can be used to improve resistant to abrasion and cohesion properties (increasing stiff and monotonic mechanical resistance) of porous asphalt mixtures which are used in pavements to improve wet-weather visibility and friction, tire spray, hydroplaning, storm water management and skid resistance.

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DOI: https://doi.org/10.17485/ijst%2F2018%2Fv11i35%2F131587