Effects Of Temperature On Resilient Modulus Of Dense Asphalt Mixtures Incorporating Steel Slag Subjected To Short Term Oven Ageing.

As the resources for naturally occurring aggregates diminished at an ever increasing rate, researchers are keen to utilize recycled materials in road construction in harmony with sustainable development

Advanced Pavement Materials for Sustainable Transportation Infrastructure

Many road managers and stakeholders are looking for more and better options for the construction and maintenance of flexible and rigid pavements. Well-designed strategies for pavement construction and maintenance have attracted the interests of researchers since a large number of existing pavements are facing deterioration all over the world. The selection and engineering properties of paving materials are crucial factors affecting the durability and therefore demanding standards of sustainability of the constructed pavement. Researchers worldwide are putting extensive efforts to develop and promote advanced pavement materials and structures for constructing and maintaining sustainable pavements. Pavement materials that can improve durability, cut costs, reduce depletion of raw materials, and lower environmental impacts are desirable for such purposes. Meanwhile, some new design ideas that differ from traditional pavement structures have shown noticeable benefits in terms of pavement durability or cost. In this regard, exploring the benefits of using advanced materials in flexible and rigid pavements is continuously investigated and has currently gained increasing attention. The articles of this issue cover original research papers that will contribute to the development and implementation of advanced pavement materials for sustainable transportation infrastructure

A quick approach for rheological evaluation of warm asphalt binders using response surface method

This paper describes a quick approach for quantification of the effects of a chemical warm named Rediset, and its interactions with temperature and aging on the rheological properties of asphalt binders using Response Sur-face Method. The central composite method was applied to design experimental programs for three test temperature conditions, namely; very high temperature (120–180 °C), high temperature (46–82 °C), and intermediate temperature (19–31 °C). Rotational viscosity, G*/sin δ and G*sin δ were selected as parameters to assess the effects of the chemical warm additive on the rheological properties of asphalt binders for different aging conditions. Evaluation of the effects of this additive on the transformed value of G*/sin δ at high temperatures indicates that additive content has significant effect on Ln(G*/sin δ). The results for intermediate temperatures show that this additive has a positive effect on G*sin δ of asphalt binders

Advanced Pavement Materials for Sustainable Transportation Infrastructure

Many road managers and stakeholders are looking for more and better options for the construction and maintenance of flexible and rigid pavements. Well-designed strategies for pavement construction and maintenance have attracted the interests of researchers since a large number of existing pavements are facing deterioration all over the world. The selection and engineering properties of paving materials are crucial factors affecting the durability and therefore demanding standards of sustainability of the constructed pavement. Researchers worldwide are putting extensive efforts to develop and promote advanced pavement materials and structures for constructing and maintaining sustainable pavements. Pavement materials that can improve durability, cut costs, reduce depletion of raw materials, and lower environmental impacts are desirable for such purposes. Meanwhile, some new design ideas that differ from traditional pavement structures have shown noticeable benefits in terms of pavement durability or cost. In this regard, exploring the benefits of using advanced materials in flexible and rigid pavements is continuously investigated and has currently gained increasing attention. The articles of this issue cover original research papers that will contribute to the development and implementation of advanced pavement materials for sustainable transportation infrastructure

Evaluation of sustainable technologies that upgrade the binder performance grade in asphalt pavement construction

There are many technologies to produce sustainable asphalt pavements that may affect various phases of pavement life. Therefore, it is difficult to choose the most appropriate technology that addresses all the engineering requirements, especially in the technologies produce the identical outputs. In this study, a PG64 asphalt binder (base binder) was upgraded to PG70 (target binder) through incorporation of two different sustainable approaches: (1) synthetic wax and (2) recovered binder from reclaimed asphalt pavement (RAP). The effects of the different modification methods were evaluated in terms of the engineering properties of materials and the sustainability features of mix production. The results indicated the modified binder (as outputs) have the same performance grade as the target binder, but the incorporation of RAP reduces the environmental pollutants at the stage of raw material processing, while the use of the wax decreases the pollutants during asphalt mix production. Consequently, the selection of the type of sustainable technology for production of cleaner asphalt pavement depends significantly on the stage desired to be modified in the pavement construction. A few scenarios and a new method are also proposed as a guide to selection of the appropriate sustainable approaches based on the binder and engineering properties