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Pro096

THE INFLUENCE OF WETTING PRIOR AND ADDITION OF FINES IN PRODUCED MORTARS WITH RECYCLED AGGREGATE



Author(s): Jochem, L. F., Rocha, J. C. and Cheriaf, M.
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: 593-598
Total Pages: 5
Language: English


Abstract: The construction and demolition waste have an important mineral portion which can be benefited for producing recycled aggregate for use in engineering works. The fine fraction, for a long time, was disregarded, because it was believed to have properties with low quality. However, the fine fraction can be improved through appropriate process showing big potential for use in technological substitution to natural aggregate, contributing to the development of sustainable materials. In this study verified the effect of wetting prior of particle size composition, using recycled aggregate dry and wet previously, and setting the maximum level of added fine fraction (less than 150 μm) that mortars support in a composition with fine sand (0.15/ 1.2 mm). Five different compositions have been defined, varying the amount of fine and cement. Were determined the physical properties of aggregates, then the mortars were prepared and evaluated the properties in fresh and hardened state. The results showed that wetting prior of the aggregate, to addition of fines and cement content affected/improved properties of mortars. Since the fine added in the mortars aid in the plasticity of the mix, durability and prevented the appearance of cracks.


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