The use of generated waste is one of the main current objectives worldwide to reduce pollution. Over the last decades, the construction field has worked on incorporating recycled materials inside the concrete matrix. Some of the recycled products that have been incorporated are recycled aggregates and waste fibers. Fiber-reinforced concrete with macro synthetic fibers is a special type of concrete that is increasingly being used in a range of applications, mainly due to its improved post-cracking capacity without corrosion risks. This work aims to compare the response of three macro synthetic fiber reinforced concrete mixes: i) a mix with natural aggregates and commercial polypropylene fibers, ii) a mix with 40% of replacement of coarse natural aggregates by coarse recycled aggregates (from construction and demolition waste (CDW)) and commercial polypropylene fibers, and iii) a mix with 40% or replacement of coarse natural aggregates by coarse recycled aggregates and full replacement of fibers by waste polypropylene fibers. The proportions of the mixes were adapted when including the recycled aggregates due to the different size distribution of the compounds. The properties analyzed are consistency, compression strength, and flexural behavior, following UNE-EN 14651. The results obtained show only slight reductions of compression and flexural strengths at high crack mouth opening displacement (CMOD). These results indicate that recycled aggregates and waste fibers are viable materials to produce macro synthetic fiber-reinforced concretes.
INFLUENCE OF RECYCLED MATERIALS ON THE MECHANICAL PROPERTIES OF MACRO SYNTHETIC FIBER-REINFORCED CONCRETE / Lerna, M.; Caballero-Jorna, M.; Roig-Flores, M.; Foti, D.; Serna, P.. - ELETTRONICO. - (2022), pp. 842-851. (Intervento presentato al convegno 6th fib International Congress on Concrete Innovation for Sustainability, 2022 tenutosi a nor nel 2022).
INFLUENCE OF RECYCLED MATERIALS ON THE MECHANICAL PROPERTIES OF MACRO SYNTHETIC FIBER-REINFORCED CONCRETE
Lerna M.;Foti D.;
2022-01-01
Abstract
The use of generated waste is one of the main current objectives worldwide to reduce pollution. Over the last decades, the construction field has worked on incorporating recycled materials inside the concrete matrix. Some of the recycled products that have been incorporated are recycled aggregates and waste fibers. Fiber-reinforced concrete with macro synthetic fibers is a special type of concrete that is increasingly being used in a range of applications, mainly due to its improved post-cracking capacity without corrosion risks. This work aims to compare the response of three macro synthetic fiber reinforced concrete mixes: i) a mix with natural aggregates and commercial polypropylene fibers, ii) a mix with 40% of replacement of coarse natural aggregates by coarse recycled aggregates (from construction and demolition waste (CDW)) and commercial polypropylene fibers, and iii) a mix with 40% or replacement of coarse natural aggregates by coarse recycled aggregates and full replacement of fibers by waste polypropylene fibers. The proportions of the mixes were adapted when including the recycled aggregates due to the different size distribution of the compounds. The properties analyzed are consistency, compression strength, and flexural behavior, following UNE-EN 14651. The results obtained show only slight reductions of compression and flexural strengths at high crack mouth opening displacement (CMOD). These results indicate that recycled aggregates and waste fibers are viable materials to produce macro synthetic fiber-reinforced concretes.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
