Talking Asphalt: A closer look at tack - March 2014
I think asphalt tack is often an overlooked part of asphalt paving. Bad mistake! A good tack or bond coat is critical for optimal performance. “Tack” is the traditional term, but some people prefer “bond;” the terms are interchangeable.
Why is tack important? The short answer is “pavement performance.” Most people recognize slippage failures where tack was applied poorly or the pavement was dirty, but tack influences ...
Lab Corner: Feeling fatigued? Winter 2013
With the colder weather, a young asphalt technologist’s thoughts turn from permanent deformation to cracking. Minimizing the cracking of asphalt pavements remains a major concern of user agencies. Fatigue cracking was one of the three principal distresses identified by the Strategic Highway Research Program (SHRP) that is experienced by asphalt mixtures in service. Laboratory fatigue testing of asphalt mixtures can help technologists ensure that the materials they use are not part of the problem.