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

  • Advancing asphalt paving technology
    April 5, 2016
    Asphalt paver manufacturers are meeting demands for high performance machines that can deliver a quality mat - Mike Woof reports Major manufacturers are rolling out ranges of new asphalt pavers designed to meet the latest emissions regulations for Europe, as well as developing models to suit customers in developing nations. The firms have designed many of the latest machines to meet tough new emissions legislation, although versions will also be available for less regulated markets also. Ammann has up
    Read More
  • High production asphalt pavers deliver performance
    February 28, 2012
    US style high production pavers are seeing key performance gains - Mike Woof reports. Exhaust emissions regulations and ever tougher safety requirements have pushed manufacturers to develop new and improved pavers aimed at the US market. The rivalry between manufacturers of these machines has also intensified. European manufacturers have developed their own US style pavers in recent years. BOMAG, Dynapac and Vögele have all designed machines using the benefit of their US engineering input in a bid to target
    Read More
  • Dynapac’s new future within the Fayat Group
    March 8, 2018
    Dynapac is now part of the Fayat Group and is a new sibling for fellow road machinery firm BOMAG - Mike Woof writes. The purchase of Dynapac from its previous owner, Atlas Copco, by the Fayat Group did generate some comment in the construction machinery sector. Dynapac, a long-standing player in the road machinery segment, is a rival to a firm that is already a key component in the Fayat Group, BOMAG. Both BOMAG and Dynapac make ranges of soil compactors, asphalt compactors, asphalt pavers and milling m
    Read More
  • Highway rebuild
    March 21, 2012
    A major contractor In Turkey is using new Dynapac pavers to resurface the busy Istanbul-Ankara highway. Onur Insaat Taahhut bought 12 new Dynapac compactors and pavers at the end of last year and is using two of its new SD135C pavers on the D-100 highway. In all 12 Dynapac asphalt paving machines and vibratory compactors were added to its fleet of equipment, and has put two of the tracked pavers to work on the Ankara to Istanbul link. The machines, four SD135C medium-sized tracked pavers, four CC524HF artic
    Read More

Highlighted Content