Laboratory investigation of the influence of warm asphalt additives on long-term performance properties of CRM binders

Abstract

This paper presents an experimental analysis of the long-term properties of rubberised binders containing warm asphalt additives. The rubberised binders were manufactured at 10% by binder weight using five different binder sources and the binders with the additives were produced using two (i.e. Aspha-min w and Sasobit w ) of the available warm asphalt processes. The rubberised warm asphalt binders were artificially short-term and then long-term aged through the rolling thin film oven and pressure ageing vessel procedures. Superpave binder tests were carried out on the binders using the rotational viscometer, the dynamic shear rheometer (DSR) and the bending beam rheometer (BBR). In general, the results of this limited study indicated that (1) the addition of the warm asphalt additives into the rubberised binders showed positive effects on increasing rutting resistance, (2) the rubberised binders containing the additives were less resistant to fatigue cracking at intermediate temperatures than the control rubberised binders (based on the G*sin d values at 258C from the DSR test) and (3) the addition of Sasobit w represented a possible lower resistance to low-temperature cracking (based on the stiffness and the m-value at 2 128C from the BBR test) and the addition of Aspha-min w had a statistically insignificant effect on lowtemperature properties of rubberised binders.

A Review of the Application of Zeolite Materials in Warm Mix Asphalt Technologies

“…The reference material in their publication included PG 64-22 asphalts of several crude sources. The viscosity increased in case of pure virgin asphalt [38], binder crumb rubber modifier (CRM), and rubberized warm asphalt binders after artificial short-term aging with rolling thin film oven (RTFO) [39,40].…”

Aging Influence on Fatigue Characteristics of RAC Mixtures Containing Warm Asphalt Additives

“…There are no previous specifications available regarding the mixing and compaction temperatures for rubberized mixture containing WMA additives, some researchers have developed guidelines for mixing and compaction temperatures when using either WMA or rubber [9,[12][13][14]. The temperatures, shown in Table 4, were determined in accordance with previous research projects [22]. Superpave mix design of all mixtures were shown in Table 5.…”

Internal structure of bitumen/polymer/wax ternary mixtures for warm mix asphalts

“…Kim et al20, 21 subjected to short and long‐term artificial ageing a PMA blended with warm additives. Other studies are dedicated to the properties and pavement performance,22 compacting temperatures,23 long term performances,24 use of heated‐reclaimed asphalt pavement and wax,25 fatigue characteristics,26 and thermo‐mechanical properties27 of asphalt mixtures containing warm mix asphalt additives. Moreover, the effect of wax on viscosity28 and rheological properties29 of modified asphalt were also evaluated.…”