Resistance to sulfate and acid attack of self-compacting concrete with recycled aggregates

Author(s): Said Kenai, Mohamed Omrane
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: 309-314
Total Pages: 6
Language : English

Abstract: Natural aggregates are sometimes lacking around big cities but construction and demolition waste debris are available to manufacture recycled aggregates. The durability performance of SCC with natural aggregates is well investigated. However, the durability of SCC with recycled aggregates under aggressive environments such as sulfate and acid attacks that could be encountered in structures near the sea, in aggressive soils or sewage treatment plants needs to be elucidated. In this paper, SCC mixes with only natural aggregates (SCCN) or 50% natural aggregates and 50% recycled coarse and aggregates (SCCR) were immersed in 3% hydrochloric acid (HCl) and 5% sodium sulfate (Na2SO4) and the weight loss measured as well as visual inspection and XRD tests. The experimental results indicate that recycled aggregated reduced the resistance to aggressive environment. The addition of 15% to 20% of natural pozzolan mitigated this negative effect.

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