Abstract:
Crushing process of construction and demolition waste is an important step of the production of recycled aggregates, once it has a fundamental role on the determination of the physical characteristics of these materials. This paper evaluates the differences between two fine recycled aggregates (FRAs), originated from coating mortar waste, and produced by two different crushing processes: jaw crusher only; and jaw crusher plus roller mill. The evaluated characteristics of the FRAs were: particle size distribution; fineness modulus; fines content; grain shape, specific gravity; and water absorption. It was noticed out that when the crushing process changes, the physical characteristics of the FRAs also changes. The FRA produced using jaw crusher plus roller mill, compared with the other one, presented a higher fines content, more spherical and porous grains, which made the water absorption capacity of it higher. On the other hand, both produced FRAs have a continuous particle size distribution.
Reference:
ALMEIDA, Fernando C.R.; SALES, Almir; MORETTO, Juliana P.; MENDES, Paulo C.D.; QUARCIONI, Valdecir Angelo. Evaluation of chloride penetration in cementitious composites with sugarcane bagasse ash sand. In: FORUM INNOVATION IN CONSTRUCTION MATERIALS, 5., 2021. Proceedings… Paper 10. p.56-59.
Access to the event on the GCU website:
https://www.gcu.ac.uk/cebe/media/gcalwebv2/ebe/content/YRF-V%20Proceedings.pdf
Crushing process of construction and demolition waste is an important step of the production of recycled aggregates, once it has a fundamental role on the determination of the physical characteristics of these materials. This paper evaluates the differences between two fine recycled aggregates (FRAs), originated from coating mortar waste, and produced by two different crushing processes: jaw crusher only; and jaw crusher plus roller mill. The evaluated characteristics of the FRAs were: particle size distribution; fineness modulus; fines content; grain shape, specific gravity; and water absorption. It was noticed out that when the crushing process changes, the physical characteristics of the FRAs also changes. The FRA produced using jaw crusher plus roller mill, compared with the other one, presented a higher fines content, more spherical and porous grains, which made the water absorption capacity of it higher. On the other hand, both produced FRAs have a continuous particle size distribution.
Reference:
ALMEIDA, Fernando C.R.; SALES, Almir; MORETTO, Juliana P.; MENDES, Paulo C.D.; QUARCIONI, Valdecir Angelo. Evaluation of chloride penetration in cementitious composites with sugarcane bagasse ash sand. In: FORUM INNOVATION IN CONSTRUCTION MATERIALS, 5., 2021. Proceedings… Paper 10. p.56-59.
Access to the event on the GCU website:
https://www.gcu.ac.uk/cebe/media/gcalwebv2/ebe/content/YRF-V%20Proceedings.pdf
