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Durability Characterization of Concrete Using Seashell Co-products as Aggregate Replacement
https://orcid.org/http://orcid.org/0000-0002-4475-6542
https://orcid.org/http://orcid.org/0000-0001-9724-1924
https://orcid.org/http://orcid.org/0000-0002-1241-2745
https://orcid.org/http://orcid.org/0000-0002-8876-9361
To limit the environmental impact of the construction sector, including the need for natural resources, new materials using co-products from other industries need to be investigated. At the same time, the aquaculture industry produces a large number of seashell co-products that need to be reused or discarded. Some researches were carried out on using seashell co-products as aggregate replacement in concrete but mainly focused on the workability and mechanical properties of seashell concrete. Thus, interrogations remain on their durability properties. This paper investigates the durability properties of concrete with a high substitution rate of aggregates by seashell co-products. Concrete with the same mechanical resistance and workability was developed with a replacement ratio of aggregates by oyster shell up to 50%. Two different types of cement were investigated: a reference Portland cement (CEM I 52.5 N) and another cement with a high blast furnace slag content (CEM III 32.5N). Over six months, the evolution of concrete's chloride resistance was studied using durability indicators such as porosity accessible to water, resistivity and apparent chloride diffusion coefficient. At the same time, the gas permeability of concrete after six months of curing was investigated under different degrees of saturation. The first results show better durability properties for concrete, including oyster shell aggregates and higher gas permeability linked with a higher porosity accessible to water. This durability improvement is increased with cement including blast furnace slag.
Durability Characterization of Concrete Using Seashell Co-products as Aggregate Replacement
https://orcid.org/http://orcid.org/0000-0002-4475-6542
https://orcid.org/http://orcid.org/0000-0001-9724-1924
https://orcid.org/http://orcid.org/0000-0002-1241-2745
https://orcid.org/http://orcid.org/0000-0002-8876-9361
To limit the environmental impact of the construction sector, including the need for natural resources, new materials using co-products from other industries need to be investigated. At the same time, the aquaculture industry produces a large number of seashell co-products that need to be reused or discarded. Some researches were carried out on using seashell co-products as aggregate replacement in concrete but mainly focused on the workability and mechanical properties of seashell concrete. Thus, interrogations remain on their durability properties. This paper investigates the durability properties of concrete with a high substitution rate of aggregates by seashell co-products. Concrete with the same mechanical resistance and workability was developed with a replacement ratio of aggregates by oyster shell up to 50%. Two different types of cement were investigated: a reference Portland cement (CEM I 52.5 N) and another cement with a high blast furnace slag content (CEM III 32.5N). Over six months, the evolution of concrete's chloride resistance was studied using durability indicators such as porosity accessible to water, resistivity and apparent chloride diffusion coefficient. At the same time, the gas permeability of concrete after six months of curing was investigated under different degrees of saturation. The first results show better durability properties for concrete, including oyster shell aggregates and higher gas permeability linked with a higher porosity accessible to water. This durability improvement is increased with cement including blast furnace slag.
Durability Characterization of Concrete Using Seashell Co-products as Aggregate Replacement
https://orcid.org/http://orcid.org/0000-0002-4475-6542
https://orcid.org/http://orcid.org/0000-0001-9724-1924
https://orcid.org/http://orcid.org/0000-0002-1241-2745
https://orcid.org/http://orcid.org/0000-0002-8876-9361
To limit the environmental impact of the construction sector, including the need for natural resources, new materials using co-products from other industries need to be investigated. At the same time, the aquaculture industry produces a large number of seashell co-products that need to be reused or discarded. Some researches were carried out on using seashell co-products as aggregate replacement in concrete but mainly focused on the workability and mechanical properties of seashell concrete. Thus, interrogations remain on their durability properties. This paper investigates the durability properties of concrete with a high substitution rate of aggregates by seashell co-products. Concrete with the same mechanical resistance and workability was developed with a replacement ratio of aggregates by oyster shell up to 50%. Two different types of cement were investigated: a reference Portland cement (CEM I 52.5 N) and another cement with a high blast furnace slag content (CEM III 32.5N). Over six months, the evolution of concrete's chloride resistance was studied using durability indicators such as porosity accessible to water, resistivity and apparent chloride diffusion coefficient. At the same time, the gas permeability of concrete after six months of curing was investigated under different degrees of saturation. The first results show better durability properties for concrete, including oyster shell aggregates and higher gas permeability linked with a higher porosity accessible to water. This durability improvement is increased with cement including blast furnace slag.
Durability Characterization of Concrete Using Seashell Co-products as Aggregate Replacement
RILEM Bookseries
Jędrzejewska, Agnieszka (editor) / Kanavaris, Fragkoulis (editor) / Azenha, Miguel (editor) / Benboudjema, Farid (editor) / Schlicke, Dirk (editor) / Martin--Cavaillé, Camille (author) / Bourdot, Alexandra (author) / Sebaibi, Nassim (author) / Bennacer, Rachid (author)
International RILEM Conference on Synergising expertise towards sustainability and robustness of CBMs and concrete structures ; 2023 ; Milos Island, Greece
2023-06-11
12 pages
Article/Chapter (Book)
Electronic Resource
English
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