Heljestorp asphalt plant

The product ECO-Asfalt®, ABT 11, have been produced in Sweden since 2015 and was introduced 2021 to the other Nordic countries Norway, Finland and Denmark. The production of ECO-Asfalt® has increased over the years and 2022 was roughly 2 million ton produced in Sweden. The product is an asphalt concrete composed of bitumen, aggregate and most of the time recycled asphalt.    

When making ECO-Asfalt®, ABT 11, bio-fuel is used for drying and heating the aggregate material, which is the part of the production process that requires most energy. The ingredients in asphalt is mainly aggregates and bitumen, besides that is amine and sometimes fibre added. The asphalt plant receives unbound aggregate material in several fractions. These are dried, sieved and added to a pug mill in controlled proportions according to a recipe. The binder, bitumen, is stored in heated storage tanks and added to the aggregate material in the same way, together with an adhesive promoter, amine. When cellulose fibre is used (in ABS), it is added directly to the mix. The pug mill drops the asphalt mix into isolated storage silos, according to mix type. The product is then loaded to the trucks from respective silo and transported to the construction site. Recycled asphalt is procured from a road under renovation; it is burden free and the only impact of additional processing is accounted for crushing into aggregates in this case. It is added to an asphalt mixture according to a procedure that is similar to the drying of stone material.