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

  • Foaming option
    July 16, 2012
    Foamed bitumen is a versatile and cost-effective tool in recycling roads - Mike Woof reports Wirtgen hopes to capitalise on the growing demand for materials recycling and its range of solutions for this sector has expanded considerably in recent times. The firm has been taking advantage of further developments in foamed bitumen technology to offer an array of cost-effective road repair solutions. The range allows this material to be used in array of cold recycling applications and Wirtgen also offers labora
    Read More
  • Wirtgen fleet helps build Romanian road
    December 17, 2013
    A fleet of Wirtgen machines is helping build a section of a major highway in Romania, the Transylvanian Autostrada A3. This 588km road connects Romanian capital Bucharest with the Hungarian border and links to the Hungarian M4 highway. Plans for the A3 got the go-ahead in 2004 and the route runs via Ploieti, Braov, Sighioara, Târgu Mure, Cluj-Napoca, Zalau and Oradea to the Hungarian border, with completion scheduled for 2017.
    Read More
  • US asphalt and quarry show highlights new technology
    May 8, 2015
    New technology was one key focus area for the World of Asphalt/AGG1 event run recently in the US city of Baltimore - Mike Woof writes Technology has been a major focus for the combined World of Asphalt and AGG1 2015 exhibition and conference held in Baltimore. The exhibition area attracted 450 exhibitors and covered a larger area than for previous events, while over 10,000 education season tickets were bought by those wanting to attend the presentation sessions. The event was held from March 17th- March
    Read More
  • Productive compaction
    July 20, 2012
    Dynapac is introducing its top-of-the-range CC624HF tandem asphalt roller to the Asian market at Bauma China. This 14tonne class high frequency tandem asphalt roller is aimed at a market with contractors, road contractors and rental companies. The CC624HF features a drum width of 2.13m and produces a static linear load on the front and rear drums of 30 and 29.1kg/cm respectively. A choice of engines is offered, rated at 93 or 113kW. In addition to the central water tank, optional extra capacity can be speci
    Read More

Highlighted Content