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Effect of carbon-negative aggregates on the strength properties of concrete for permeable pavements

Monrose, John; Tota-Maharaj, Kiran; Mwasha, A; Hills, C.D

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Authors

A Mwasha

C.D Hills



Abstract

Permeable pavements are engineered to temporarily store water to reduce flooding during rainfall events. Permeable pavements are distinguished primarily based on their surface materials which can vary from concrete, asphalt, clay brick, concrete pavers or plastic grids. This paper examined the effect of lightweight carbon-negative aggregates (CNA) on the behaviour of concrete intended for use as solid concrete block pavers in permeable pavements. Performance indicators targeted compressive strength, splitting tensile strength, density and water absorption. CNA were produced and sourced from manufacturing firm Carbon8 Systems in Kent U.K which applies patented accelerated carbonation technology to solidify incinerated ash into useful eco-friendly aggregates. The methodology involved substituting natural aggregates (NA) by mass, with CNA at percentages varying from 0 to 100. A scanning electron microscope was used to examine the aggregate–mortar interface. Both the compressive and tensile strengths decreased exponentially with the addition of CNA. Average 28-day compressive and splitting tensile strengths ranged from 69 MPa (10,000 PSI) to 18 MPa (2600 PSI) and 3.84 MPa (560 PSI) to 1.23 MPa (178 PSI) respectively. Density values decreased linearly with the addtion of CNA with average values ranging from 2200–2600 kg/m3. ⁠Conversely, water absorption increased with increases in CNA with average values ranging from 1.66% to 9.17%. Depending on the loading requirements, CNA can replace NA in solid permeable pavement blocks by up to 100%.

Citation

Monrose, J., Tota-Maharaj, K., Mwasha, A., & Hills, C. (2020). Effect of carbon-negative aggregates on the strength properties of concrete for permeable pavements. International Journal of Pavement Engineering, 21(14), 1823-1831. https://doi.org/10.1080/10298436.2019.1567924

Journal Article Type Article
Acceptance Date Dec 23, 2018
Online Publication Date Jan 24, 2019
Publication Date Dec 1, 2020
Deposit Date Jan 25, 2019
Publicly Available Date Jan 25, 2020
Journal International Journal of Pavement Engineering
Print ISSN 1029-8436
Electronic ISSN 1477-268X
Publisher Taylor & Francis (Routledge)
Peer Reviewed Peer Reviewed
Volume 21
Issue 14
Pages 1823-1831
DOI https://doi.org/10.1080/10298436.2019.1567924
Keywords microstructure, lightweight concrete, compressive strength, permeable pavements, carbon-negative aggregate
Public URL https://uwe-repository.worktribe.com/output/853427
Publisher URL https://doi.org/10.1080/10298436.2019.1567924
Additional Information Additional Information : This is an Accepted Manuscript of an article published by Taylor & Francis in International Journal of Pavement Engineering on 24/01/2019, available online: https://doi.org/10.1080/10298436.2019.1567924

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http://creativecommons.org/licenses/by-nc/4.0/

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Copyright Statement
This is an Accepted Manuscript of an article published by Taylor & Francis in International Journal of Pavement Engineering on 24th January 2019, available online: https://doi.org/10.1080/10298436.2019.1567924. It is deposited under the terms of the Creative Commons Attribution-NonCommercial License (http://creativecommons.org/licenses/by-nc/4.0/), which permits non-commercial re-use, distribution, and reproduction in any medium, provided the original work is properly cited.


Main document R1.docx (5.7 Mb)
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Licence
http://creativecommons.org/licenses/by-nc/4.0/

Publisher Licence URL
http://www.rioxx.net/licenses/all-rights-reserved

Copyright Statement
This is an Accepted Manuscript of an article published by Taylor & Francis in International Journal of Pavement Engineering on 24th January 2019, available online: https://doi.org/10.1080/10298436.2019.1567924. This is an Accepted Manuscript of an article published by Taylor & Francis in International Journal of Pavement Engineering on 24th January 2019, available online: https://doi.org/10.1080/10298436.2019.1567924. It is deposited under the terms of the Creative Commons Attribution-NonCommercial License (http://creativecommons.org/licenses/by-nc/4.0/), which permits non-commercial re-use, distribution, and reproduction in any medium, provided the original work is properly cited.





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