Mix design engineers are constantly tasked with determining the right ratios of aggregate and binder to develop asphalt mixtures that will meet performance requirements. Traditionally, mix designs have employed volumetric analysis relying on the evaluation of compacted samples to determine properties such as air voids and voids in mineral aggregate, among others. For instance, the Marshall method includes tests [...]
Sripath Technologies President Krishna Srinivasan was recently honored to speak to a delegation from the Government of Goa, India’s Public Works Department (Roads) during a conference coordinated by Bitpath, a Sripath affiliate based in India. The presentation topic, “Innovative Additives to Enhance Roadway Performance,” reflected the growing need for solutions to using high-RAP mixes on Indian roadways to address [...]
TRANSCRIPT FROM VIDEO: Overall mix cost is a critical component when designing a balanced mix that also meets performance and sustainability requirements. Importantly, high-RAP mixes have been shown to demonstrate cost savings in research conducted by the National Asphalt Pavement Association. According to NAPA data, using RAP has already resulted in $3.4 billion in savings on material [...]
With the current changes in bitumen quality stemming from global sourcing and decreased focus on bitumen production by suppliers, engineers are looking for novel approaches to achieve performance requirements in asphalt mixes without relying on producers to meet specifications. This has led to the development of a balanced mix design in asphalt, which helps engineers formulate mixes that [...]