FIRST RECYCLING OF PAVEMENTS MADE IN PLANT WITH FOAMED ASPHALT
The new technology is being implemented by the company CVC in the PPP Circuit 6 project
The designed structural package includes a stabilized base with foamed asphalt and an asphalt road surface with modified asphalt type PG 70-28 in different thicknesses as required by each section of the project. The particularity of this work is that a material stabilized with foam asphalt is used, produced in a WIRTGEN KMA 220 fixed plant with material extracted from the Route itself and with the addition of virgin material to comply with the specification of a BSM 1 according to the TG specification. -2 from South Africa.
Once the material is mixed at the plant, it is transferred to the construction site and laid by means of a sequence of two pavers and compactors to achieve the project thicknesses and adequate design densities. Between each paver a padfoot compactor enters and after the last layer a pair of tandem and pneumatic compactors give the appropriate density and surface finish.
Subsequently, a protective irrigation with emulsion is applied IRRIGATION BITAFAL 65 which remains open to traffic until the execution of a semi-dense mix made with asphalt modified with polymers of the type PG 70-28.
Stabilized with foamed asphalt has the particularity that it is a semi-bound granular material, so the failure method is rutting and not fatigue. Therefore, once the pavement reaches a rut of 10mm, the existing mixture is milled and the same thickness is replaced and it is ready to continue supporting loads.
The Circuit 6 project involves the rehabilitation of 78 km of National Route No. 6 and includes the duplication of roads in several sections, the widening and rehabilitation of the existing pavement structures, which must be maintained for 20 years by the concessionaire company. Big Blade Consortium. Several sections are made with the aforementioned technology and other sections are made by in situ recycling with foamed asphalt.
We are grateful to the company for the trust provided for the supply of emulsions and modified asphalts for your project.
We hope that this new technology will have an exponential development in our country.
