ACCIONA Construction has been presented with one of the awards at the sixth edition of the Castilla y León Sustainable Construction Awards, organised by the Department of Public Works and the Environment of the Regional Government of Castilla y León in collaboration with the Institute of Construction in this region.
The awards are held every two years and a total of 110 participants registered for this sixth edition.The awards ceremony took place on 18 January and was attended by Alejandro Favieres, head of department in the Central Zone; Antonio Tenorio, project manager in the Central Zone, and Juan José Cepria, R&D specialist with ACCIONA Construction.
The project submitted by ACCIONA Construction, entitled “Study of the treatment of acid soils by reusing waste from different industries for the construction sector”, received the award in the Special category.
ACCIONA Construction’s winning project offers an inventory of the traditional methods used to tackle the challenges posed by acid soils and analyses their advantages and disadvantages.It goes on to propose solutions for the disadvantages associated with these traditional treatment methods, such as the excessive solubility of some neutralising agents, supply problems, environmental costs or the high CO2 emissions generated from the production of lime, one of the most commonly used substances for treating acid drainage.
Acid drainage, a problem traditionally associated with the mining sector, can occur from any actions that involve sulphurous rocks and can even occur naturally.In civil engineering works, acid drainage problems are not well understood and it often goes undetected until there is deterioration in the natural environment or it has an impact on structures.
The study carried out by ACCIONA Construction analyses a series of industrial wastes that are present in nearly every country where the company operates, identifying the most appropriate treatment method taking into account aspects such as transport, availability of the materials, resource optimisation and cost improvements.The construction sector can therefore take on a waste recovery role based on a model of industrial symbiosis, transforming the waste into secondary raw materials.In a circular economy, the new raw materials obtained from waste contribute to the economic, environmental and social progress of the regions in which the works are carried out.