Patent AU-2019202413-B2 (AU)
Title: Improved concrete road pavement with more sustainability benefits
Inventor: NGUYEN DUY HUU
IPC: E01C11/22
Filed: 2019-04-07
Granted: 2020-10-29
Abstract: This invention describes an improved concrete road pavement, specially designed for a safer, cheaper and 
ultimately more sustainable road network. Its unique characteristics, accompanied by practical advantages over 
traditional pavements, are presented in the following dot points: 
• Conventionally, a solid section is employed in concrete road pavement. In this invention, concrete road 
pavement is redesigned to create a hollow channel inside the cross section. The hollow channel can either 
replace or cooperate with existing drainage system to multiply drainage capacity of the road. This is 
beneficial to most road networks, especially those suffering the high risk of regular and/or periodical 
flooding.  
• As concrete material is more reasonably distributed, the pavement consumes less concrete while ensuring its 
strength and serviceability under standard traffic. Inside the hollow channel, a permanent formwork structure 
made of waste plastic is installed, serving as formwork to support concrete placement and water insulation to 
protect concrete from direct contact with water. The utilisation of waste plastic helps significantly reduce its 
direct disposal into environment, increasing recycling rate and fostering a sustainable development in 
modem infrastructure.  
• The improved pavement utilizes the advanced technology of self-compacting concrete reinforced with steel 
fibres, resulting in a convenient and easy construction method. This is a dual benefit, as it not only facilitates 
the construction of the pavement itself, but the integrated hollow drainage channel also evidences a relief of 
the crucial need of large clearance and/or deep excavation/tunnelling to build new drainage systems.  
• The pavement is constructed in modules/segments which are assembled on site by flexible joints. The 
flexible joints increase the flexibility of the pavement compared to conventional design. Combined with 
more even and smoother top surfaces (benefitted from the technology of self-compacting concrete), the 
structure promises a noise reduction in service.  
• The improved concrete road pavement is suitable for both new construction and replacement, with little 
influence on existing structural facilities. Along with its affordability and constructability, the pavement 
helps harmonize or overcome most sustainability issues in modem infrastructure, particularly in transport 
systems.  
Pa 9 cia
CONVENTIONAL CONCRETE PAVEMENT IMPROVED CONCRETE PAVEMENT 
Example design of an urb n road with 4 traffic lanes 
Side walk I traffic lane traffic lane 1 traffic lane 1 traffic lane Side walk 
Hollow concrete pavement 
(precast in segments/modules) 
Solid concrete pavement Plastic formwork 
( aa ScutPaade Subgrade 
Lane mark Trench drain 
Also, lane division DETAIL 1 
-W ater drain Additional water storage channel Water drain 
DETAIL I 
Longitudinal trench drain Secondary filter 
Also, lane division Upper plate 
Base layer Lower plate LVertical wall 
Flexible connection joint - Internal formiwork 
(between 2 adjacent Plastic 
pavement segments)