Contents July 2012 Volume 82. Number 7 28 8
HIGHWAY CONTRACTOR IC's High IQ
Intelligent Compaction (IC) for hot mix asphalt is a work in progress. IC rollers are valuable quality control tools that go a long way toward solving the shortcomings of the conventional process. But as we said, it's a work in progress.
SPECIAL SERIES
A 16
The Chemistry of Road Building Materials
BetterRoadsDigital.com Facebook Twitter www.facebook.com/betterroadsmagazine 32 ROADSCIENCE
The Chemistry of Aggregates.
How liquid asphalt, cement/water, and asphalt emulsions perform set, cure and perform in the field depends to a tremendous degree on the physiochemistry of the aggre- gates they contact, including their chemical composition, residual moisture, porosity, and the heat of mixing and heat of hydration. Aggregates vary chemically and physically, they interact with cement and binders and that impacts success in the field.
APPLICATIONS & INNOVATIONS Off Roof, Into Road
Recycled Asphalt Shingles (RAS) are making inroads into road- mixes as used asphalt continues to find its way into specs.
SPECIAL SECTION: Hot and Cold
Tight budgets and the need to innovate still drive a lot of road renovation projects. With the help of the Pavement Preservation and Recycling Alliance (PPRA) we look at two road renewal proj- ects: Hot-in-place in Colorado and Cold-in-place in Los Angeles
BetterRoads.com DIGITAL EDITION
EXTRA SPECIALS
Tire Tracks Earthmover tires are a critical component of uptime, cost control and profi tability. A guide.
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In Court: Brian Morrow looks into a case about when a contractor may "pass through" a subcontractor's claim
MORE New Road Products
COLUMNS & DEPARTMENTS 3 Lattatudes
44 Kirk Landers
PRODUCTS & SERVICE 40 Marketplace 43 Advertiser Index
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