Influence of recycled aggregate and recycled sand on the development of the early age properties of concrete since setting

Author(s): Brice Delsaute, Stéphanie Staquet
Paper category: Proceedings
Book title: SynerCrete’18: Interdisciplinary Approaches for Cement-based Materials and Structural Concrete: Synergizing Expertise and Bridging Scales of Space and Time Vol. 1 & 2
Editor(s): Miguel Azenha, Dirk Schlicke, Farid Benboudjema, Agnieszka Jędrzejewska
ISBN: 978-2-35158-202-2
e-ISBN: 978-2-35158-203-9
Publisher: RILEM Publications SARL
Publication year: 2018
Pages: 231-236
Total Pages: 6
Language : English

Abstract: This paper aims at identifying the effect of the substitution of natural coarse aggregate and sand by recycled aggregate and sand on the early age development of the free deformation and the mechanical properties since setting. For this purpose, a new experimental testing protocol for the characterization of cementitious materials at early age is used. This new approach is based on the repeated application of thermal variation and loading using a newly developed testing device. The high porosity and absorption of the recycled aggregate and sand induces a strong reduction of the autogenous deformations, the modulus of elasticity and the strength during the hardening process. An elastic calculation of the restraint of the free deformations shows that the use of recycled aggregate and sand decreases the risk of cracking.

Online publication : 2018
Publication type : full_text
Public price (Euros) : 0.00