TRANSPORT PROPERTIES OF RECYCLED FINE AGGREGATE CONCRETES

Author(s): Zega, C. J., Sosa, M. E. and Di Maio, A. A.
Paper category: Conference
Book title: XIII International Conference on Durability of Building Materials and Components - XIII DBMC
Editor(s): Marco Quattrone, Vanderley M. John
Print ISBN: none
e-ISBN: 978-2-35158-149-0
Publication year: 2015
Pages: 1065-1072
Total Pages: 8
Language: English

Abstract: The use of crushed waste concrete as a substitute for natural aggregate for concrete production presents economic and environmental benefits. Therefore, several countries have recommendations for the use of recycled coarse aggregate in structural concrete, which limits the use of the fine fraction as a result of the high content of dust and foreign materials. Due to economic factors related to the shortage of natural sands suitable for concrete production, and to achieve an integral use of this type of waste, the use of recycled fine aggregate (RFA) has reached a remarkable international interest.

In this study, the durable behaviour of structural concretes with different strength levels (water/cement ratios 0.40, 0.50 and 0.60), and made with 20% and 40% of RFA was analyzed. Different transport properties such as water absorption, capillary suction and water penetration under pressure were evaluated. The performance of recycled concretes was compared with that of conventional concretes made with crushed fine aggregate in the same percentages. The results indicate that, despite the higher porosity of recycled concretes, their durable performance may be similar to that of conventional concrete.

Online publication: 2015
Publication Type: full_text
Public price (Euros): 0.00