Types of Modified Asphalt

Conventional versus Modified Asphalts
Asphalt modification usually involves the dispersion of different polymers within the neat asphalt (bitumen). ECOPATH engineering places a high importance on the identification of compatible asphalt-polymer blends to ensure that the optimum properties are achieved at the most competitive price.

Asphalt Rubber
Asphalt rubber (AR) (usually called ground tire rubber (GTR) modified asphalt or crumb rubber modified (CRM) asphalt ) originally was designed to fall under the specifications of ASTM D6114 - 97(2002). This type of modified asphalt is consistent with traditional asphalt rubber where a crumb rubber concentration by total weight is necessary. This type of modified asphalt binder has been shown to exhibit excellent properties with regards to safety, noise reduction, and field performance.

Typical asphalt rubber blending plant site

Asphalt Rubber versus Asphalt Rubber

Are all asphalt rubber binders created alike? The correct answer is definitely no!
At ECOPATH we know the importance of both raw ingredients and the processes behind the development of a successful asphalt rubber binder. Due to our experience in the field we have come across a number of state specifications requiring various additives, crumb rubber types, reaction times, crumb rubber gradations and reaction procedures.

Benefits of Asphalt Rubber

FAQs on Asphalt Rubber

EVA Modified Asphalts

In many asphaltic compositions it is particularly desirable to have a high degree of flexibility combined with toughness and durability. High ductility is especially desirable for meeting the specifications demanded in industrial asphalts used in materials such as roofing shingles, built-up roofs, canal linings, pipe coatings, etc. Additionally, because of the temperature stress to which these asphalts may be subjected, it is desirable to have an asphalt which can withstand low temperatures over time without developing significant brittleness and not flow at high temperatures. The parameters of these conditions may also be expressed as the well known physical properties of asphalt: viscosity, penetration and softening point.

Elvaloy Modified Asphalts

Ethylene polymers are characterized by a low polarity and low reactivity plastomers. They are like waxes in this respect, having a low dielectric constant and being soluble in hot oils, hot wax and hot hydrocarbons. They also are well known to be inert. For some uses it is desirable to modify the ethylene polymers to make them flexible, to impart more polarity to the polymers, and to be able to use them in reaction with other resins.

Hybrid binders

PPA Modified Asphalts

SBS Modified Asphalts

The basic process used to modify asphalt cement with polymers (primarily SBS polymer) is to introduce both liquid asphalt cement and polymer pellets into a heated mixing (or wetting) tank, where they are mixed and the polymer is softened.

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