Micro-structural and rheological characteristics of SBS-asphalt blends during their manufacturing |
| |
| Authors: | Diego O Larsen José Luis Alessandrini Alejandra Bosch M Susana Cortizo |
| |
| Affiliation: | 1. Laboratorio de Pavimentos e Ingeniería Vial, Facultad de Ingeniería, Universidad Nacional de La Plata, 1900 La Plata, Argentina;2. Departamento de Física, Facultad de Ciencias Exactas y Comisión de Investigaciones Científicas de la Provincia de Buenos Aires (CIC), Universidad Nacional de La Plata, 1900 La Plata, Argentina;3. Centro de Investigación y Desarrollo en Fermentaciones Industriales (CINDEFI, CONICET), Facultad de Ciencias Exactas, Universidad Nacional de La Plata, 1900 La Plata, Argentina;4. Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas (INIFTA), Facultad de Ciencias Exactas – CONICET, Universidad Nacional de La Plata, Casilla de Correo 16, Sucursal 4, 1900 La Plata, Argentina |
| |
| Abstract: | Two styrene–butadiene–styrene block (SBS) copolymers which differ in weight average molecular weight and two base asphalts (from local crude source, Argentina) had been blended under different experimental conditions. Rotational viscosity, fluorescence microscopy, size exclusion chromatography (SEC) and FT-IR spectrometry were used in order to study the rheological and morphological changes of the blends during their manufacturing. Our results show that the high shear rate and temperature used during this procedure induce the SBS copolymer degradation and the degradation fragments distribution into maltenic asphalt phase. These events are responsible for the observed changes. The optimal time which produces the best rheological properties of modified asphalt depends on the blend composition and on the shear rate used. |
| |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
