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

  • New paving range
    February 8, 2012
    Several key additions to Dynapac's equipment line-up will extend the firm's machine range for the road construction market. Paving, planer and compaction lines will benefit from new machines, with president Claes Ahrengart emphasising the investment in research and development Dynapac continues to make.
    Read More
  • Asphalt paving innovations coming to market
    May 24, 2019
    Asphalt paver manufacturers are introducing new models, many of which are aimed at specific market needs – Mike Woof writes A range of new asphalt paver models are coming to market, with some having been developed specifically for certain markets. China’s demand for construction equipment has resulted in numerous firms developing machines just for this market for example. Customers in China have long favoured the European-style machines, featuring tamper bar screeds, over the machines with vibrating
    Read More
  • Houston Airport paving work for Dynapac
    May 23, 2022
    Equipment from Dynapac is playing an important role in improving facilities at Houston Airport. The firm´s TH E technology has been employed to deliver a surface to grade, with high levels of pre-compaction and also automation.
    Read More
  • New asphalt paving developments are coming to market
    January 7, 2015
    Atlas Copco introduces new low emission diesels in its latest large paver models - Mike Woof writes The large pavers from Atlas Copco’s Dynapac range are now compliant with the Tier 4 Final/Stage IV emissions regulations due to the installation of new engines. Running costs are also said to have been reduced due to lower fuel consumption and the firm claims each of the latest models can offer a fuel saving of 4200 litres/year, as well as a reduction in CO2 emissions of 11tonnes/year.
    Read More

Highlighted Content