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

  • Developments in asphalt paver performance
    February 16, 2012
    Key additions will boost the asphalt paver offering for customers, Mike Woof reports. There are a number of key players in the asphalt paving market that see the value of investing in design, technology and performance. For customers this has resulted in a wide variety of high quality, high performance machines to choose from.
    Read More
  • Hamburg-Finkenwerder airport has new runway surface
    August 21, 2013
    Hamburg’s Finkenwerder airport is now benefiting from a new runway surface following work carried out by contractor KEMNA BAU. The company recently used machines from Dynapac to resurface 36,000m2 of the runway track in Hamburg-Finkenwerder, a facility used by Airbus. The airport handles around 10-15 take-offs and landings/day when aircraft are either undergoing flight testing or being delivered to customers, as well as for deliveries of components by transport aircraft. The project was tricky as the
    Read More
  • Cost-saving benefits of dual layer asphalt paving
    February 14, 2012
    Sophisticated dual layer paving technologies currently on the market are said to offer major advantages to road builders. Roads built using twin layer, hot on hot paving techniques can last considerably longer than those constructed using conventional methods. Contractors and clients also stand to gain from savings on materials costs, through the elimination of the need for emulsion spraying between binder and wearing courses and with the use of thin layer wearing course designs. At present two paver man
    Read More
  • Sri Lanka Airport runway upgrade
    December 7, 2017
    Sri Lanka’s main international airport now features a new runway surface that will help improve air transport efficiency at the facility The project was carried out successfully, despite a tough time schedule, boosting safety at the airport. This new runway will help increase capacity at the airport, allowing Sri Lanka to develop the tourist sector on which the country depends heavily for its economic growth. The work at the international airport for Sri Lanka’s capital Colombo was carried out with the
    Read More

Highlighted Content