9 articles
Cement-treated base
Cement-treated base (CTB) is a strong, durable paving base made by mixing soil or aggregate with portland cement and water, used under both asphalt and concrete surfaces.
Hot in-place recycling
Hot in-place recycling is a pavement rehabilitation method that softens existing asphalt with heat and repaves it on site, minimizing new materials and correcting surface distresses like cracks and ruts.
Pavement condition index
The pavement condition index (PCI) is a 0-to-100 rating of pavement surface condition, developed by the U.S. Army Corps of Engineers and standardized in ASTM D6433.
Polymer-modified asphalt
Polymer-modified asphalt, also called polymer-modified bitumen, is an asphalt binder produced by dispersing 3 to 7 percent polymer into molten asphalt to resist rutting, fatigue cracking, and thermal cracking.
Present serviceability index
The present serviceability index (PSI) is a pavement quality measure on a scale of 0 to 5, developed at the AASHO Road Test in 1958 to 1960.
Reclaimed asphalt shingles
Reclaimed asphalt shingles are processed roofing shingles from manufacturing scrap or residential tear-offs, ground and added to asphalt paving mixtures, supplying up to 20 percent of the mix's binder.
Roller-integrated compaction
Roller-integrated compaction, originating in Europe as continuous compaction control and now called intelligent compaction, lets vibratory rollers measure soil stiffness in real time using accelerometers and GPS.
Self-healing asphalt
Self-healing asphalt is pavement material engineered to repair its own microcracks through binder recovery or added technologies such as induction heating, microcapsules, and microbes, extending service life.
Stone mastic asphalt
Stone mastic asphalt (SMA), also called stone matrix asphalt, is a gap-graded asphalt mixture developed in Germany in the mid-1960s to resist studded-tire wear on pavements.