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Ten year performance of asphalt additive test sections : Lave Butte - Fremont Highway Junction Section, The Dalles - California Highway (US#97), Deschutes County, Oregon.
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1998-09-01
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By Edgar, Rob
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Alternative Title:Ten year performance of asphalt additive test sections : Lave Butte - Fremont Highway Junction Section.
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Abstract:The durability of hot mix asphalt concrete (HMAC) overlays is important to the Oregon Department of Transportation (ODOT), as this is the most common form of surface rehabilitation on state roads. To see if several HMAC additives available in Oregon increased overlay life, test sections were paved in 1985.
The eight test and two control sections are located on US Route 97, 31 km (19.25 mi) south of Bend, Oregon. The top course is a 38-51 mm (1.48-1.99 in.) thick lift of HMAC using the experimental additives. The combined base and leveling course is a 102-114 mm (3.98-4.45 in.) thick lift of HMAC, using a combination of aggregate treated with lime and Pave Bond (registered trademark) asphalt additive as anti-stripping treatments. The pavement under the overlay was badly alligatored and had frequent thermal cracks.
The aggregate is crushed river cobbles composed mainly of basalt and other extrusive igneous rocks. The experimental mixes are: Plus Ride 12 (registered trademark) with Pave Bond (registered trademark), Arm-R-Shield (registered trademark), Fiber Pave (registered trademark) 3010, Boni Fibers (registered trademark) B, Class "C" with Pave Bond (registered trademark) and Lime, Class "C" with Lime, CA(P)-1 and CA(P)-1 with Lime. The Class "C" and in some cases, Class "C" with Pave Bond (registered trademark) pavements are the control sections.
After ten years and approximately 1,522,000 and 1,721,000 equivalent single axle loads in the northbound and southbound lanes, respectively, all pavements resisted rutting, maintained a smooth ride and retained high friction numbers. The only significant distress on any sections were cracking and raveling. The Arm-R-Shield (registered trademark) had the highest performance rating, as it had superior resistance to fatigue cracking, block cracking, and raveling. The Fiber Pave (registered trademark) 3010, Boni Fibers (registered trademark) B, Class "C" with Pave Bond (registered trademark), Class "C" with Pave Bond (registered trademark) and Lime, and Class "C" pavements had similar performance. The Plus Ride (registered trademark) with Pave Bond (registered trademark) section performed worse than the controls. It had a low resistance to fatigue cracking, block cracking, and raveling. The CA(P)-1 and CA(P)-1 with Lime sections also performed worse than the controls. They had a low resistance to fatigue, block and transverse cracking.
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