In particular, these researchers have succeeded in using non-conforming ash from thermal power plants instead of the ultrafine fraction of natural aggregates (silica filler) extracted from quarried and milled stone.
Development and results of the study
The study consisted of a physical-chemical analysis of the ashes and, subsequently, the design and testing of mixtures with ashes instead of ultrafine fractions (filler) from quarries, all with the aim of obtaining more environmentally friendly concrete.
After extensive testing, the research group has succeeded in producing a concrete with mechanical and durability properties suitable for use in construction.
Self-compacting structural concrete
Seven years of work have resulted in a self-compacting structural concrete with better performance than those made with conventional materials, according to the directors of the research.
In addition to optimising natural resources and waste recovery, the work of the UCO researchers, whose analysis was carried out in collaboration with the University of Navarra, offers a way out of coal-fired power plants. In fact, fly ash accumulates in these factories without any use, and its final destination is controlled landfills. In this way, this study opens up an interesting horizon for making it useful and thus changing its fate, according to a UCO communiqué.
Prefabricated elements for structural use
The intention of the research team involved is to industrialise the new concrete. The manufacture of prefabricated elements for structural use such as beams, supports or floor slabs is envisaged.
The fly ash used in the research came from the Puente Nuevo thermal power station, located between the towns of Espiel and Villaviciosa de Córdoba.
