Name: JOÃO PAULO COSTA MENESES
Type: MSc dissertation
Publication date: 18/09/2017
Advisor:
Name |
Role |
|---|---|
| JAMILLA EMI SUDO LUTIF TEIXEIRA | Advisor * |
Examining board:
| Name |
Role |
|---|---|
| JAMILLA EMI SUDO LUTIF TEIXEIRA | Advisor * |
| PATRÍCIO JOSÉ MOREIRA PIRES | Internal Examiner * |
Summary: Porous asphalt (PA) is a widespread paving technic because of the advantages over conventional pavement, especially in rainy conditions, as headlights glare reduction at night, spray and splash reduction and aquaplaning risk reduction and adherence increase. Binder draindown is one of the problems of the mixture, and using stabilizing fibers at mix design is a commonly alternative to reduce the phenomenon. Sugarcane bagasse fibers are an option, and it use are based on environmental issues, by giving a new disposal to sugar-alcohol industry waste. Due to geographic positioning and consequent intense rainy periods, using PAs in Brazil shows to be quite suitable. However, PA use in Brazil still is incipient, either by high costs and/or lack of national specific dosage standards. The aim of this study was to evaluate physical and mechanical behavior of PA with the addition of cellulose fibers (CEL), commonly used to minimize binder draindown, but also with sugarcane bagasse (SB) fibers. Due to lack of Brazilian standardization, the ASTM D7064-13 guideline were used for dosage. Beyond standard required tests (Cantabro abrasion resistance and binder draindown), resilient modulus (RMT), indirect tensile strength (IDT) and permeability tests were performed to evaluate mixtures performance. SB mixtures showed higher draindown values, although was responsible for reducing draindown if compared to mixtures without fibers. Furthermore, the lower RMT/IDT values for the SB mixtures indicated better fatigue life behavior. Although low values for permeability were obtained, due to the adopted granulometric range, it was concluded that in PAs the use of fibers can significantly reduce its permeability coefficient.
Keywords: porous asphalt (PA), permeable friction course (PFC); fibers; cellulose; sugar cane bagasse; durability; fatigue; drainability.
