A platform for research: civil engineering, architecture and urbanism
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Mechanical and Durability Performance of Concrete Containing Calcined Excavated London Clay
https://orcid.org/http://orcid.org/0000-0001-9687-5474
https://orcid.org/http://orcid.org/0000-0002-0277-5315
https://orcid.org/http://orcid.org/0000-0003-0427-3068
https://orcid.org/http://orcid.org/0000-0002-9647-3106
By replacing a large portion of Portland cement with calcined clay, carbon emissions associated with concrete production can be significantly reduced, facilitatingnet-zero targets in construction projects. Vast amounts of soil waste generated from major infrastructure projects could serve as a valuable resource for producing cement replacements or supplementary cementitious materials (SCMs); however, it is largely unknown whether low-purity, low-kaolinite content clays are suitable for producing resilient concrete. This study investigated the use of low-purity calcined clay, derived from excavation operations in the greater London area, as an SCM in the production of concrete. Specifically, the effects of replacing CEM I with calcined excavated London Clay (30 wt.% replacement) or by replacing CEM I with 30 wt.% calcined London Clay plus 15 wt.% limestone on concrete’s performance were explored. Concrete mixes were prepared with a binder content of 360 kg/m3 and a water-to-binder ratio of 0.5. Mechanical and transport properties were monitored for a curing period of up to 180 days. Additionally, durability performance, including chloride migration and accelerated carbonation, was evaluated. The results revealed that concrete containing excavated London Clay achieved a compressive strength of about 40 MPa after 28 days of curing, exhibiting an increased chloride resistance compared with CEM I concretes. This outcome demonstrates the high potential of utilizing low-purity calcined clay (about 30% kaolinite content) obtained from excavation activities to produce sustainable and durable concretes.
Mechanical and Durability Performance of Concrete Containing Calcined Excavated London Clay
https://orcid.org/http://orcid.org/0000-0001-9687-5474
https://orcid.org/http://orcid.org/0000-0002-0277-5315
https://orcid.org/http://orcid.org/0000-0003-0427-3068
https://orcid.org/http://orcid.org/0000-0002-9647-3106
By replacing a large portion of Portland cement with calcined clay, carbon emissions associated with concrete production can be significantly reduced, facilitatingnet-zero targets in construction projects. Vast amounts of soil waste generated from major infrastructure projects could serve as a valuable resource for producing cement replacements or supplementary cementitious materials (SCMs); however, it is largely unknown whether low-purity, low-kaolinite content clays are suitable for producing resilient concrete. This study investigated the use of low-purity calcined clay, derived from excavation operations in the greater London area, as an SCM in the production of concrete. Specifically, the effects of replacing CEM I with calcined excavated London Clay (30 wt.% replacement) or by replacing CEM I with 30 wt.% calcined London Clay plus 15 wt.% limestone on concrete’s performance were explored. Concrete mixes were prepared with a binder content of 360 kg/m3 and a water-to-binder ratio of 0.5. Mechanical and transport properties were monitored for a curing period of up to 180 days. Additionally, durability performance, including chloride migration and accelerated carbonation, was evaluated. The results revealed that concrete containing excavated London Clay achieved a compressive strength of about 40 MPa after 28 days of curing, exhibiting an increased chloride resistance compared with CEM I concretes. This outcome demonstrates the high potential of utilizing low-purity calcined clay (about 30% kaolinite content) obtained from excavation activities to produce sustainable and durable concretes.
Mechanical and Durability Performance of Concrete Containing Calcined Excavated London Clay
https://orcid.org/http://orcid.org/0000-0001-9687-5474
https://orcid.org/http://orcid.org/0000-0002-0277-5315
https://orcid.org/http://orcid.org/0000-0003-0427-3068
https://orcid.org/http://orcid.org/0000-0002-9647-3106
By replacing a large portion of Portland cement with calcined clay, carbon emissions associated with concrete production can be significantly reduced, facilitatingnet-zero targets in construction projects. Vast amounts of soil waste generated from major infrastructure projects could serve as a valuable resource for producing cement replacements or supplementary cementitious materials (SCMs); however, it is largely unknown whether low-purity, low-kaolinite content clays are suitable for producing resilient concrete. This study investigated the use of low-purity calcined clay, derived from excavation operations in the greater London area, as an SCM in the production of concrete. Specifically, the effects of replacing CEM I with calcined excavated London Clay (30 wt.% replacement) or by replacing CEM I with 30 wt.% calcined London Clay plus 15 wt.% limestone on concrete’s performance were explored. Concrete mixes were prepared with a binder content of 360 kg/m3 and a water-to-binder ratio of 0.5. Mechanical and transport properties were monitored for a curing period of up to 180 days. Additionally, durability performance, including chloride migration and accelerated carbonation, was evaluated. The results revealed that concrete containing excavated London Clay achieved a compressive strength of about 40 MPa after 28 days of curing, exhibiting an increased chloride resistance compared with CEM I concretes. This outcome demonstrates the high potential of utilizing low-purity calcined clay (about 30% kaolinite content) obtained from excavation activities to produce sustainable and durable concretes.
Mechanical and Durability Performance of Concrete Containing Calcined Excavated London Clay
Lecture Notes in Civil Engineering
Barros, Joaquim A. O. (editor) / Cunha, Vítor M. C. F. (editor) / Sousa, Hélder S. (editor) / Matos, José C. (editor) / Sena-Cruz, José M. (editor) / Dhandapani, Yuvaraj (author) / Subramanian, Kirthika Kala (author) / Black, Leon (author) / Kanavaris, Fragkoulis (author) / Bernal, Susan A. (author)
FIB International Conference on Concrete Sustainability ; 2024 ; Guimarães, Portugal
4th fib International Conference on Concrete Sustainability (ICCS2024) ; Chapter: 55 ; 455-462
2024-12-29
8 pages
Article/Chapter (Book)
Electronic Resource
English
Mechanical and durability study of Tunisian calcined clay in lightweight concrete of expanded clay
| Taylor & Francis Verlag | 2021
| British Library Online Contents | 2018
| British Library Online Contents | 2018