South Korean technology for thin overlays

South Korean company Hansoo Road Industry has developed an ultra-thin hot mix asphalt pavement layer, Recover asphalt, designed to overlay cracked pavements at a depth of between 10 and 20mm. “Our company has been studying asphalt modifiers since 1999 and has know-how on research and development of asphalt modifiers,” said Yulia Min, manager at Hansoo Road Industry. “Recover asphalt was developed through a four-year study based on the previous studies of asphalt modifier technology.” Recover asphalt has
May 15, 2019 Read time: 2 mins
Hansoo Road Industry’s Recover asphalt is a 2cm-thick overlay, which can be installed over cracked roads
South Korean company Hansoo Road Industry has developed an ultra-thin hot mix asphalt pavement layer, Recover asphalt, designed to overlay cracked pavements at a depth of between 10 and 20mm.


“Our company has been studying asphalt modifiers since 1999 and has know-how on research and development of asphalt modifiers,” said Yulia Min, manager at Hansoo Road Industry. “Recover asphalt was developed through a four-year study based on the previous studies of asphalt modifier technology.”

Recover asphalt has been used on national, local and urban roads in Korea since 2016 after the produce received its patent. It is currently undergoing tests and trials in China and Europe, says Min.

Recover asphalt is created by adding pellets containing CSM Modifier to the asphalt plant. Based on microfibres, the modifier contains additives which give elasticity and ductility to the asphalt mixtures at both low and high temperatures.

Min says that asphalt mixtures containing the modifier show “excellent plastic deformation resistance which can increase the performance of the asphalt pavement”. Because the small size of the aggregates in Recover asphalt, a maximum of 5mm, the overlay is used in downtown areas to reduce noise levels from road pavements. Hansoo said that over 8dB noise reduction is achieved, when compared to the existing, aged pavement with up to 12dB reduction observed for some roads.

Materials

Related Content

  • Cold climate binder selection, a tricky business
    May 16, 2017
    Binder selection in cold climates is especially critical for extended pavement life, as Robert Otto Rasmussen, vice president and chief engineer of Transtec Group, explains. The cold climate found in regions such as Canada and the northern regions of the US and Europe poses a particular challenge to engineering a long-lasting, high-quality pavement. Pavements constructed with asphalt in those regions are affected by the asphalt binder’s sensitivity to temperature. Choosing a binder wisely is imperative for
    Read More
  • RCC road paving technology growing in demand
    November 13, 2014
    US contractor Robert Smith based in Chattanooga has long experience in the asphalt paving market but has recently added roller compacted concrete (RCC) to its paving portfolio. This heavy-duty cement mix can be poured as quickly as asphalt and the company has now developed its skills at laying large areas of RCC in just a few days for its industrial client base. Demand has grown and RCC work now accounts for over 90% of the firm’s workload, which it carries out using a Volvo CE paver.
    Read More
  • Rainforest road repair and rehabilitation with stabilisation
    May 23, 2014
    A limited amount of aggregate and resources, including fuel, in the Riau province of Indonesia can challenge roadbuilders, but Indonesian contractor PT Harap Panjang overcame the obstacles on a recent project. The province rests in a tropical rainforest. The 2600mm of annual rainfall take a toll on the area’s roads, particularly those developed by oil company Chevron Pacific Indonesia. The remote roads were built to service Chevron operations, crucial to the economies of the city, region and country. The r
    Read More
  • Testing highway materials for best performance
    February 23, 2012
    Big increases in traffic mean that today highways are under greater pressure than ever, and materials have to perform to increasingly higher standards. Modern highways, particularly in and around major cities, are tested like never before, and it is essential that surfaces are built to withstand increasing traffic.
    Read More

Highlighted Content