MIX DESIGN PROPERTIES AND MOISTURE SENSITIVITY CHARACTERISTICS OF DENSE BITUMINOUS MACADAM MIXES MODIFIED WITH REDISET, A WARM MIX ADDITIVE

On Bituminous Mix Design

Bituminous mix design is a delicate balancing act among the proportions of various aggregate sizes and bitumen content. For a given aggregate gradation, the optimum bitumen content is estimated by satisfying a number of mix design parameters. This article briefly discusses the current approaches in bituminous mix design and singles out the issues involved.

Rheological Characterization of Bituminous Binder containing Wax based Warm Mix Asphalt Additive

Warm mix asphalt (WMA) has been gaining increasing popularity in recent years due to energy savings and environmental benefits. The mechanism of WMA is to use some additives or technologies to reduce the viscosity of bitumen and to modify the rheological behavior of bituminous binders, and thus improve the workability of the mixture at lower temperature. In this study a paraffin wax based addit...

Road-mix vs. Plant-mix in Bituminous Road Construction

below the surface through scarifier teeth. Emulsions and medium-curing and slow-curing asphalts were used. The travelling plant-mix was not entirely satisfactory because of conditions existing on this project. It is necessary to have the windrow of material quite wet in order to get it through the travelling pug-mill mixer. The project was built late in the fall, and the water did not evaporate...

Investigating the rutting and moisture sensitivity of warm mix asphalt with varying contents of recycled asphalt pavement

Ncat Evaluates Warm Mix Asphalt

In addition to lower emissions warm mix asphalt has several advantages over hot mix asphalt such as fuel energy savings, decreased binder aging and an extended paving season (Photo courtesy: Matthew Corrigan, FHWA) The National Center for Asphalt Technology (NCAT) is evaluating warm mix asphalt (WMA) technologies. WMA technology allows the mixing, lay down, and compaction of asphalt mixes at si...