Mix Design

Various forms of in‐place pavement recycling have been used to rehabilitate and maintain pavements in the United States since the 1930s. The oil embargo of the 1970s and its economic ramifications stimulated the use and the development of in‐place recycling. New binder materials, construction equipment, construction operations, mix design, quality control/quality assurance (QC/QA) techniques and specs […]

Long-life or perpetual pavements are designed and built to last longer than 50 years, requiring only a periodic mill and inlay of the surface layer. The pavement structure is designed using appropriate materials and layer thicknesses to prevent structural distresses that begin at the bottom of the pavement structure, such as bottom-up fatigue cracking and […]

When you need a course on how to make a new mix design, sometimes it’s easier to have the trainer come to you. Consultants in the paving business have been following that model for decades. The engineers at the National Center for Asphalt Technology (NCAT) at Auburn University offer this as well. If you need […]

In the fall of 2012, an idea was born. The asphalt pavement industry, always seeking to build high-quality roadways for owners and the traveling public, launched a new effort to support short-term and timely, scientific, engineering research that is focused on delivering tools and knowledge that highlights asphalt’s competitive advantages. Our past efforts centered on […]

The story of Palmetto Corp, Conway, S.C., runs three generations deep. In the 1960s, Mack Godwin began offering asphalt patching and driveway paving as part of his company, Godwin Construction. In 1987, his son Marshall struck out on his own to offer these services on a larger scale and Palmetto Corp was born. Marshall’s son, […]

Many producers believe stone, sand and asphalt cement (AC) change very little in the few years of service before ending up as millings in the RAP pile. While this is certainly true for aggregates, it may not be the whole truth for the asphalt binders. The chemistry of AC starts to change the instant it […]

Although we’ve discussed the use of slag before, AsphaltPro revisits the concept for the annual recycling issue. As a recycled product, slag is another tool in the asphalt industry’s belt for making sustainable pavements. With this primer, we’d like to give a clearer and basic understanding to those who might be interested in the incorporation […]