Skip to Main content Skip to Navigation
Journal articles

Effect of recycled concrete aggregates and recycled filler on delayed ettringite formation: An experimental study compared to chemical modelling

Abstract : This study investigates the development of delayed ettringite formation in concrete made of recycled concrete aggregates (RCA) and in mortars with a recycled concrete filler. Experimental results are compared to a chemical model of delayed ettringite formation by Sellier & Multon (2018). Three concretes were formulated, one with natural siliceous aggregates and two others with two different RCA. Concrete and mortar samples were screened for one year for DEF damage. Results show that RCA based concrete did not develop DEF damage, but concrete made of siliceous aggregate did. Recycled filler had a small negative effect on DEF but not as much as limestone filler. Comparison to chemical modelling, including six additional mortars from Yammine (2020), shows that the produced expansive volume can not be directly linked to the measured expansion. The porosity of mortars and concrete plays an important role in controlling the expansion. All formulations that did exhibit large expansions had developed a maximum volume of expansive products higher than 30% of their porous volume. These results suggest a simple method to predict DEF related expansion in concrete with or without recycled concrete products.
Complete list of metadata

https://hal.archives-ouvertes.fr/hal-03710473
Contributor : François Bignonnet Connect in order to contact the contributor
Submitted on : Thursday, June 30, 2022 - 4:53:42 PM
Last modification on : Wednesday, July 20, 2022 - 11:21:34 AM

File

 Restricted access
To satisfy the distribution rights of the publisher, the document is embargoed until : 2022-12-20

Please log in to resquest access to the document

Identifiers

Citation

Alexandre Yammine, Mahmoud Hamdadou, Nordine Leklou, François Bignonnet, Marta Choinska-Colombel. Effect of recycled concrete aggregates and recycled filler on delayed ettringite formation: An experimental study compared to chemical modelling. Cement and Concrete Composites, Elsevier, 2022, 132, pp.104636. ⟨10.1016/j.cemconcomp.2022.104636⟩. ⟨hal-03710473⟩

Share

Metrics

Record views

7