Patent AU-2019202413-A1 (AU)
Title: Improved concrete road pavement with more sustainability benefits
Inventor: NGUYEN DUY HUU
IPC: E01C11/22
Filed: 2019-04-07
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 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)