Road Surface Technology’s latest issue included a feature on Sripath’s product portfolio and its commitment to sustainability efforts in the paving industry. The article focused on how the innovative additive developer evaluates its resource and energy use while addressing performance concerns. For sustainability in asphalt to be impactful, contributors to the paving lifecycle need to back their [...]
TRANSCRIPT FROM VIDEO: When using Reclaimed Asphalt Pavement in mixes was first introduced, the common belief was that the only modification needed was to soften the binder before adding RAP to a mix. However, research has demonstrated that while viscosity is an important property to consider, additional functional characteristics need to be restored for the resulting roadway [...]
TRANSCRIPT FROM VIDEO: Reclaimed Asphalt Pavement is sourced from older, weathered, and worn roadway surfaces. Because of this, the materials in the RAP, particularly the bitumen, age and lose some of their chemical and physical properties. As the binder oxidizes over time, the material can become brittle. This is what causes the roadway performance to fail. To [...]
TRANSCRIPT FROM VIDEO: The approach used depends on the specifications adopted for liquid binders in a given jurisdiction, country, or region. Some locales will set softening point and penetration specs, some will use binder viscosity specs, and yet others may rely on performance grade specs. In all cases, rejuvenator dosage is determined by blending virgin binder, extracted [...]