Autocan - Fewer constraints and superior performance

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The laying and maintenance of buried utility lines in urban areas generally cause disruption …

The laying and maintenance of buried utility lines in urban areas generally cause disruption
to the surrounding community. Despite all the precautions taken when filling trenches with
conventional materials, there are frequent problems of trench subsidence as a result of
differences in compaction.
To avoid these problems, Eurovia has developed a high-performance trench fill product that is
laid by means of an innovative technique: Autocan. The process uses the fluidity of the material and the Archimedes principle to simplify and accelerate pipelaying.

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  • 1. AUTOCAN TRENCH FILL Fewer constraints and superior performance
  • 2. AUTOCAN TRENCH FILL The laying and maintenance of buried utility lines in urban areas generally cause disruption to the surrounding community. Despite all the precautions taken when filling trenches with conventional materials, there are frequent problems of trench subsidence as a result of differences in compaction. To avoid these problems, Eurovia has developed a high-performance trench fill product that is laid by means of an innovative technique: Autocan. The process uses the fluidity of the material and the Archimedes principle to simplify and accelerate pipelaying. Key Benefits No compaction needed Less subsidence after laying Reduction in noise pollution Less disruption for the surrounding community Rapid re-trafficking Better environmental protection Key figures Pedestrian traffic possible 2 to 3 hours after filling Patent filed over 10 years ago Materials savings of more than 25%
  • 3. IT DOES VIRTUALLY ALL THE WORK! Autocan is a trench fill process that uses a slurry and a resourceful pipelaying technique. The Autocan process consists in using buoyancy to wedge the upper surface line of pipes against metal chocks levelled from above. The process can be applied to all types of pipes (with the exception of cast iron) and all pipe diameters. The special Autocan formula provides a self-placing, self-compacting and incompressible product. The slurry is used as pipe bedding and coating, trench fill and in some cases pavement base courses. The laying technique makes it possible to rapidly and safely work on restricted area worksites while substantially reducing disruption to the surrounding community. A PROCESS WITH multi-advantages Autocan combines a large number of advantages: > presence of personnel in trenches limited to the time needed to assemble the pipes, or eliminated altogether when the pipes are assembled outside the trench (PVC and HDPE pipes, for example), > narrower trenches, > small worksite footprint, > less spoil to be removed, > no on-site storage of materials, > guaranteed pipe slope, > no risk of pipe deformation during compaction. The Autocan process facilitates complex geometry works in sub-soils occupied by utility networks and in urban areas. It avoids the risk of subsidence in filled zones and the resulting deterioration of surface courses. Autocan is a safe and clean process that conserves materials and re-uses industrial by-products, thus contributing to Eurovia’s environmental programme. AND IT IS VERSATILE as well! Autocan can serve as a pavement base course for roads with moderate traffic (< T3). It is also used to fill former utility trenches and underground cavities (quarries, tunnels, cellars). The process is recommended for all types of sewers and for the laying and maintenance of underground utility networks. It is suitable for all types of non-metal pipes. Cast iron and steel pipes require prior coating with resins or wrapping with sleeves.
  • 4. TECHNICAL DEPARTMENT 18, place de l’Europe - 92565 Rueil-Malmaison Cedex Tel. : 33 (0)1 47 16 38 00 - Fax : 33 (0)1 47 16 38 01 www.eurovia.com technique@eurovia.com CHARACTERISTICS THAT MAKE A DIFFERENCE The Autocan slurry is a thixotropic and fluid product that offers continuous and uniform coating of pipelines, as well as good bonding to the trench walls. The material rapidly achieves immediate buoyancy characteristics. It can be opened to pedestrian traffic two to three hours after filling and pavement surface courses make rapid re-trafficking possible. On-site bearing factor (EN 13286) at 24 hours IPI ≤ 10 Resistance to penetration (Pandalightdynamicpenetrometer) at 24 hours > 2 MPa simplified maintenance Autocan remains excavatable without special equipment. It is "easy" to "moderately easy" to excavate (CERTU "Trench fill" of June 1998), facilitating subsequent maintenance. high impermeability Autocan is an impermeable material that does not release water during setting, adapts to all types of surrounding terrain and exhibits extremely limited hydraulic shrinkage. All these characteristics are achieved thanks to an innovative formulation devised by the Eurovia laboratories: a mixture based on selected silicon- aluminium flyash, hydraulic binder (cement), organic fibres and water. The Autocan slurry is produced ready to use in a concrete plant or a stabilisation plant. It is transported to the worksite in conventional mix trucks. It is laid by simply pouring it into the trench, spreading it through a chute Formulations using incineration bottom ash are also offered: the Scorcan® process. Depending on their nature, trench excavation materials can also be used with the Recycan® process. The Autocan process has been patented. -Février2014-500copies–Photos:Euroviaphotolibrary