John Monrose John2.Monrose@live.uwe.ac.uk
Effect of carbon-negative aggregates on the strength properties of concrete for permeable pavements
Monrose, John; Tota-Maharaj, Kiran; Mwasha, A; Hills, C.D
Authors
Kiran Tota-Maharaj
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%.
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 |
Contract Date | Jan 25, 2019 |
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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)
Document
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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