Chinese bridge resurfacing with new materials

An innovative resurfacing method has been used for a bridge in China, with a sophisticated mix being used to boost wear characteristics The landmark Nanning Bridge in China’s Nanning City has benefited from a complete surface overhaul. The work was carried out recently after the bridge had been in use for around 10 years. The project is of note as it is thought to be the first comprehensive commercial application of graphene- compound rubber modified asphalt technology in a high-class road/bridge surface
December 13, 2018 Read time: 3 mins
The Nanning Bridge has been resurfaced using an innovative additive in the asphalt mix
An innovative resurfacing method has been used for a bridge in China, with a sophisticated mix being used to boost wear characteristics


The landmark Nanning Bridge in China’s Nanning City has benefited from a complete surface overhaul. The work was carried out recently after the bridge had been in use for around 10 years. The project is of note as it is thought to be the first comprehensive commercial application of graphene- compound rubber modified asphalt technology in a high-class road/bridge surface project in the world.

Adding graphene to asphalt improves the durability and sustainability of asphalt road surfaces, making the asphalt less likely to soften in warm temperatures or harden and crack in cold conditions. The additive also reduces road wear, particularly under high loads, by increasing the elasticity and strength of the asphalt.

This is said to be a key technical breakthrough for road surface materials and is claimed to solve the common problem of short surface-longevity seen on highways in China and elsewhere. Another important factor is that this technology is highly cost-efficient, delivering economic benefits.

The new material system has been developed jointly by 5389 Guangxi University and Guangxi Zhenglu Machinery Technology. The latter is a user of 206 Dynapac compaction and paving equipment and has over the past 20 years been responsible for carrying out numerous high-quality projects in China. “We are not only the project contractor, but we are also the construction solution provider in the field,” explained Gui Li Fa, the president of Guangxi Zhenglu.”

Two Dynapac SD2550CS pavers with hydraulically extendable ends (HEE) screeds, six Dynapac CC6200 twin drum rollers and two Dynapac CP275 rubber tyred rollers were used for the resurfacing work at the Nanning Bridge. The working area was for a length of more than 1,000m and a width of 35m.  

The SD2550CS pavers featuring the HEE system were used as this design offers versatility in highway construction work. According to Guangxi Zhenglu Machinery Technology, the machines can be used for large paving widths and can also be adapted for quickly for much narrower paving widths. The firm says that these machines can be employed for paving jobs in the continuous narrowing or widening of bridge ramps, variable sections or widening sections in tunnels or emergency-parking zones on highways. And the design means that there is no need to reassemble the screed, maximising working efficiency.

The screeds allow working widths from 3-14m, while the HEE system allows a maximum working width of 13.75m.

Earthmoving & soil compaction

For more information on companies in this article

Related Content

  • Safety upgrade for Canadian highway
    February 20, 2012
    New machines from Dynapac have played an important role in tackling a stretch of Canadian highway with safety issues. The machines have been used to meet experimental compaction standards specified by highway engineers, so as to withstand Canada's harsh winter conditions. Canadian contractors InterCite Construction and Pavex of St Felicien have used the new Dynapac machines for work on upgrading Route 175, one of Canada's most dangerous highways, located in the Province of Quebec. Route 175 is a 174km long
    Read More
  • Bitumen technology suppliers seek new ways to save money and work more efficiently
    April 24, 2013
    When World Highways decided to ask some of the industry’s leading suppliers what the future holds for bitumen, we found out - not surprisingly in the current economic climate - that it’s all about saving money. Kristina Smith reports. How quickly the tide turns. Just two years ago, saving carbon and the planet was moving up many countries’ political agendas. Now politicians in Europe and beyond have been forced to park commitments in the face of economic austerity. “The big issue with local government is th
    Read More
  • Paving on Algeria's mega highway
    March 1, 2012
    A fleet of 53 Dynapac machines is being used by a Chinese consortium to build the central and western sections of the 1,216km Algerian East-West Expressway. The consortium comprises CITIC and CRCC and was awarded the contract for the 169km central and 359km western sections of highway.
    Read More
  • Advances in asphalt paving equipment coming to market
    June 27, 2018
    Some of the key manufacturers are improving asphalt paving technology with key developments to machines as well as the electronics and telematics systems fitted – Mike Woof writes. Several of the major asphalt paver manufacturers have unveiled new machines and systems that can optimise operations. Improved operating features for the BOMAG BF 800 C-2 paver are said to help increase its output and efficiency when working on-site. An important development is the new traffic light system, which helps improve co
    Read More

Highlighted Content