Severely Whitetopping refers to laying a thin concrete mapped or alligatored asphalt is not a suitable choice for overlay directly on top of an existing distressed Hot Mix UTW. Pavement sections with underground conduits and Asphalt (HMA) pavement (Julie 2002).
Ultra-Thin Whitetopping is a pavement rehabilitation technique that involves the placement of a thin Portland Cement Concrete overlay 50 mm to 100 mm thick, over a distressed Hot Mix …
Mar 18, 2019· Pavement Milling, Ultra-Thin Bonded Wearing Course Overlay with Drainage and Safety Improvements State of Maine - Department of Transportation: Maine: 02/21/2019: 03/13/2019: Pavement Milling, Hot Mix Asphalt Overlay, Cyclical Pavement Resurfacing, with Drainage and Safety Improvements State of Maine - Department of Transportation: Maine: 02/21 ...
Jan 01, 2010· Hundreds of bonded portland cement concrete (PCC) overlays of hot-mix asphalt (HMA) pavements are being constructed in the United States and around the world. Increasing interest in this rehabilitation method has led to a need to define further the most common forms of distresses, quantify the extent of influence of design parameters on ...
Thin and Ultra-thin Concrete Overlays Thomas Burnham, P.E ... wintertime to exceed the strength of the bonded thin concrete overlay. ... debonding of the ultra-thin whitetopping from the hot-mix asphalt layer led to cracking, and eventually surface distress(5). Photos 3 and 4 show a core sample demonstrating significant loss
bonded wearing course (UBWC), 4.75-mm hot mix asphalt (HMA) thin overlay (UTO), and profile milling (or diamond grinding). The test sections for each type of surface treatment covered a wide range of traffic volume from light to high. The service life for the …
Three types of thin surface treatments, 25-mm Hot-Mix-Asphalt (1" HMA) overlay, ultra-thin bonded asphalt surface (Nova Chip), and chip seal, were examined in this study.
M. Li, in Advanced Composites in Bridge Construction and Repair, 2014 7.3.12 Reflective cracking in repairs. In bridge-deck overlay repairs, premature reflective cracking is often the ultimate failure mode that limits repair service life. 61,62 – 63 Concrete or hot mix asphalt (HMA) overlays are primary methods for rehabilitating distressed asphalt and Portland cement concrete pavements ...
• Micromill and overlay with ¾ inch of Ultra Thin Bonded Overlay (UTBO) proposed surface treatment. Use of Hot Applied Asphaltic Crack Filler as surface preparation for the UTBO treatment • Variable depth (0" – ¾") micromilling for inlay adjacent to shoulders • Fog seal of Route 24 roadway shoulders
Pavement Milling, Hot Mix Asphalt Overlay, Cyclical Pavement Resurfacing, with Drainage and Safety Improvements and other incidental work. Location: In Franklin County:Project 2242800 is located in Jay on Route 4, beginning 0.31 mile north ofHyde Road and extending northwesterly 1.87 miles.
Feb 10, 2012· Top n' Bond by Sakrete is a polymer modified repair mortar used for patching, repairing and resurfacing cracked or chipped concrete surfaces. Just add water ...
Ultra Thin Bonded Wearing Course (UTBWC) is a treatment for existing asphalt or pavement. It corrects surfaces that are beginning to erode, crack, or ravel. This repair work is best for complete resurfacing that needs to be done quickly, without sacing on durability.
over an existing asphalt pavement. Concrete overlays have been used to rehabilitate bituminous pavements since 1918 in USA. There has been a renewed interest in white topping, particularly on Thin White Topping (TWT) and Ultra-Thin White Topping (UTWT) over Conventional White Topping. Based on the types of interface, these
A concrete overlay is a thin layer of concrete used to resurface or repair existing concrete. The new overlay can be applied from feather edge thin up to 2" thick in some cases. Overlays can be stamped, broom finished, or left smooth.
This work consists of constructing an ultrathin bonded asphalt concrete wearing surface. The ultrathin bonded asphalt concrete consists of application of a warm polymer modified asphalt emulsion followed immediately with a 5/8 inch (16mm) minimum hot asphalt concrete overlay. 874.02 Materials. Conform to the following requirements:
8.1 Introduction. Thin whitetopping (TWT) is a 4- to 7-in. thick concrete overlay bonded to an existing asphalt concrete pavement (ACP) to create a composite section (see Figure 8-7). TWT is constructed normally at intersections where rutting and shoving in asphalt pavement continue to cause problems. TWT may also be used at access or exit ...
within one day of overlay placement. Thin concrete overlays can also be opened quickly in hot weather. 4. Inch for inch, concrete overlays are one of the most cost-effective pavement alternatives. Maintenance and rehabilitation alternatives typically last longer than their asphalt counterparts with the same thickness. 5.
If the overlay is being placed only to remedy functional deficiencies, normally a thinner overlay would suffice. However, two inches is the minimum practical constructible thickness for an overlay. Alternately, a thin hot mix asphalt wearing course may be considered.
Also look to the mix design. Watson emphasized getting enough asphalt in the mix. "That applies to any overlay or mix, but it's critical for thin overlays." — Types of Thin Overlays. 4.75 mm Superpave. 9.5 mm Superpave. 12.5 mm Superpave. 4.75 mm stone matrix asphalt (SMA) 9.5 mm SMA. 12.5 mm SMA. Ultra-thin bonded wearing course (UTBWC)
Performance of Ultra Thin Bonded Wear Course . This review was part of ongoing research to determine how Bituminous over Concrete (BOC) pavement cracks, and how to reduce or eliminate cracking of the Hot Mix Asphalt (HMA) overlay.
UBAS - Ultra-Thin Bonded Asphalt Surface UBAS is a high performance thin overlay that uses an award-winning technology to seal the existing road surface and provides a new, skid-resistant, smooth, and thin 5/8" HMA (hot mix asphalt) wearing course.
TRB's National Cooperative Highway Research Program (NCHRP) Synthesis 338: Thin and Ultra-Thin Whitetopping summarizes available information to document how state departments of transportation and others are currently using thin and ultra-thin whitetopping overlays among various pavement rehabilitation alternatives.
Pavement Milling, Hot Mix Asphalt Overlay, with Drainage and Safety Improvements, and other incidental work.Location: In York County: Project 2244000 is on Route 5 in Old Orchard Beach, beginning 0.06 mile west ofUnion Avenue and extending westerly 1.27 miles to the Saco city line.
The Ultra-Thin Bonded Wearing Course Process: The UTBWC process consists of a heavy spray application of polymer modified asphalt emulsion followed immediately by an ultra-thin gap-graded hot mix asphalt. Both applications are quick completed in one pass by a specially designed paving machine. Once the hot …
Thin and ultra-thin whitetopping are Portland Cement Concrete (PCC) overlays that have become more widely accepted as rehabilitation alternatives for existing Hot Mix Asphalt (HMA) pavements in the United States: • Thin whitetopping (TWT) refers to 4-6 inches of PCC overlay on a HMA pavement.
Rasmussen, Robert Otto, and Dan K. Rozycki. "Thin and Ultra-thin Whitetopping: A Synthesis of Highway Practice." National Copperative Highway Research Program NCRHRP Synthesis 33, (2004). Barman, Manik, Julie M. Vandenbossche, and Zichang Li. "Influence of Interface Bond on the Performance of Bonded Concrete Overlays on Asphalt Pavements."
UTFC, also known as ultra-thin bonded HMA overlay in other states, is placed using specially designed equipment called a spray paver that spreads tack coat immediately before the thin layer of hot mix asphalt in a single pass. UTFC provides a more durable overlay than most thin overlays due to …
In addition, preservation surface treatments, such as chip seal, fog seal, microsurfacing, 4.75 mm thin or ultra-thin overlay, can not only repair certain pavement surface defects, but also change the surface characteristics of pavement and therefore affect pavement surface friction performance.