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

  • Compaction in the field
    July 31, 2012
    Special applications require stringent quality control and with compaction machines a key part of the paving process, their contribution can be vital. A high quality finish has helped athletes breaking sporting records on the track at the Shanghai Stadium in China during this year's 2008 Summer Olympic Games. Built in 1997 the stadium has been the venue for numerous major sporting events prior to the Olympics, however its track was showing signs of wear and the local authorities decided that a full refurbis
    Read More
  • Cost-saving compact twin layer asphalt paving
    February 28, 2012
    Twin-layer paving offers high quality, long lasting road surfaces to be constructed. Paver manufacturer Dynapac is one of the pioneers of the twin-layer paving technique, which it calls Compactasphalt. According to Dynapac this method offers major benefits to contractors and clients alike as roads surfaced using this technique last longer and are cheaper to maintain. To ensure contractors have maximum utilisation of their machines, Dynapac offers a modular paver system that can be operated using the convent
    Read More
  • Ahmedabad airport roll-out for Dynapac
    September 7, 2022
    Dynapac machines have set production records during the upgrade of Sardar Vallabhbhai Patel International Airport in the Indian state of Gujarat.
    Read More
  • Asphalt paving design advances
    June 15, 2012
    A diverse array of advanced paver designs is now being offered in the asphalt paving sector – Mike Woof reports With the World of Asphalt and INTERMAT 2012 events having both taken place in recent months, a series of innovations have been introduced for the asphalt paving market. Developments have come to market that widen the array of both US and European asphalt paving systems and all the major manufacturers have developed new pavers and materials feeders to meet the latest emissions requirements. Demand
    Read More

Highlighted Content