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Belt and Road Infrastructure Development


With Mandatory Usage of

Reacted and Activated Rubber and Dynamic Compaction?


President Xi Jinping delivered a keynote speech at the "Belt and Road" Summit Forum stated that:

We should adhere to the concept of openness, green, integrity ”…” promote green infrastructure construction, green investment, green finance, to protect the common home we depend on”…

This is a common call (i.e. promotion of green infrastructure) from many sectors of the worldwide leadership, from António Guterres United Nations President to the Paris Agreement.

As evidence of mankind’s impact on global warming of our weather increases almost weekly, it becomes ever more relevant to understand how the repurposing of waste streams can be beneficially used in to reduce the destructive effects of climate change.

One of those cases is the waste flow stream of car and truck tires. Every year that stream increases, now in the billions worldwide, not only with the number of vehicles in circulation but also with increasing travel distances.

Currently most of those tires are essentially burned and some energetic benefit is derived from it. However, it has become amply evident, that if that waste stream of a highly technological developed product which was specifically fabricated to be elastic and resist aging is used in the maintenance and construction of pavements the energetic benefits surpass those of energy recovery by factors of up to 20!

As such the use of crumb rubber from recycled tires when used in the paving industry the energy savings are simply astonishing



I am honored that I was invited by James Ding from Landpac (www.landpac.com.cn) to host the South African delegates that participated in this Forum.

The South African delegates were very pleased that the two most current Green Practices occurring already in China are technologies brought from South Africa many years ago. Namely dynamic compaction (introduced in 1995) and asphalt rubber (introduced in 2005).

Dynamic compaction reduces the compaction time and energy spent as well as increase the stiffness of the bases and subgrades.

Asphalt rubber uses recycled tires and increases the durability of the pavements while reducing their thicknesses.

Long lasting pavement require strong bases (made better by dynamic compaction) and flexible overlays (made better by asphalt rubber).

The combined contribution of these two key construction aspects can reduce CO2 emissions (in a life cycle cost analysis) to levels probably 20% of those otherwise emanated if they are not used.

South African delegates visited the asphalt rubber production facility in Beijing and visited a few sites near the airport which have been in perfect condition under very heavy traffic for more than 11 years (while in adjacent sections conventional paving have already been replaced).


Landpac Daxing R&D Production Center


Asphalt Rubber 2016 overlay in West Ring Road in

Beijing Economic-Technological Development Area


Beijing Capital Airport T3 Expressway Asphalt Rubber overlay in April 2008.



Meanwhile I was pleased to inspect dynamic compaction works currently under way in the new Beijing Daixing airport.




Beijing Daxing International Airport


Beijing Daxing International Airport






The use of crumb rubber in roads, with the proper technologies, has already been widely demonstrated that is cost effective and it does reduce CO2 emissions. In California laws mandate that the California Department of Transportation must use a very large portion mixes with asphalt rubber in all their road network.

Dynamic Compaction and asphalt rubber, as introduced in China by LANDPAC (www.landpac.com.cn), and with new green asphalt rubber technologies,  like those being proposed by CIRTEC (www.cirtec.es), Silent Rubber Pave European project (www.silentrubberpave.eu) and SHRP (www.rarx.net) which incorporate reacted and activated rubber in pavement either directly in the modified mixes or using stress absorbing membranes, as described and promoted by the Rubberized Asphalt Foundation (www.ra-foundation.org), are important CO2 saving paving technologies.

It is my recommendation that based in the overwhelming success that these technologies have demonstrated that their use become mandated in the new Belt and Road infrastructure construction projects.


Dr. Jorge B. Sousa



Rubberized Asphalt Foundation