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

  • MTVs help transfer material efficiently
    June 20, 2016
    Mention the letters MTV and most people will think you’re referring to Music Television, the firm that revolutionised the music video. But in the road construction sector the letters have another meaning: Material Transfer Vehicle. Roadtec pioneered the MTV concept with its Shuttle Buggy, which it introduced in 1989. The concept was a novel one, providing a transition between the truck hauling the asphalt to the site and the asphalt paver. The idea of the machine was that it would provide a buffer system
    Read More
  • Vögele's global paving vision
    January 4, 2013
    German paver specialist Vögele is taking a global view of the construction equipment market, with machines developed for very different markets. A prime example of this is with the Dash 3 models now coming to market. The new SUPER 2100-3 paver is also available as the SUPER 2100-3i, a highly sophisticated machine that meets the European emissions requirements while offering high productivity and performance. At the same time, the company is also offering a heavy duty (HD) version of its proven SUPER 1800-2
    Read More
  • Indian airport revamp sets record
    September 2, 2022
    The use of machines from Dynapac has helped deliver upgrade work at Ahmedabad Airport in India, while setting production records
    Read More
  • Twin layer paving evolves
    November 2, 2012
    Dual layer paving offers benefits to wear life as well as major cost reductions - Mike Woof reports The concept of laying the binder course and wearing course at the same time is not new to the road construction market. Various contractors have been working on systems over a number of years, with several manufacturers helping directly with these projects. A number of firms have investigated this method but three manufacturers in particular, Dynapac and Vögele in Europe and Sumitomo in Japan, have made major
    Read More

Highlighted Content