Sustainable infrastructure development through use of calcined excavated
waste clay as a supplementary cementitious material
waste clay as a supplementary cementitious material
File(s)
Accepted version
Author(s)
Zhou, D
Wang, R
Tyrer, M
Wong, HS
Cheeseman, C
Type
Journal Article
Abstract
Major infrastructure development projects in London produce large quantities of London clay and use significant volumes of concrete. Portland cement (CEM I) in concrete is normally partially replaced by supplementary cementitious materials such as ground granulated blastfurnace slag or pulverised fuel ash. The supply of supplementary cementitious materials is critical to the production of sustainable concrete. This study has investigated use of waste London clay as a supplementary cementitious material. The optimum calcined clay was produced at 900 °C and concrete made with 30 wt% of CEM I replaced by calcined clay had 28-day strengths greater than control samples. Compressive strengths of concrete containing calcined London clay were similar to concrete containing ground granulated blastfurnace slag and pulverised fuel ash. The production of calcined London clay emits ∼70 kg CO2/tonne and this is 91% lower than CEM I. 30 wt% replacement of CEM I by calcined London clay therefore produces concrete with ∼27% lower embodied carbon. London clay can be calcined to form a technically viable supplementary cementitious material and use of this in concrete would enable major civil infrastructure projects to contribute to a circular economy.
Date Issued
2017-12-01
Date Acceptance
2017-09-10
Citation
Journal of Cleaner Production, 2017, 168 (1), pp.1180-1192
ISSN
0959-6526
Publisher
Elsevier
Start Page
1180
End Page
1192
Journal / Book Title
Journal of Cleaner Production
Volume
168
Issue
1
Copyright Statement
© 2017, Elsevier. Licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/
Identifier
https://www.sciencedirect.com/science/article/pii/S0959652617320887
Subjects
Science & Technology
Technology
Life Sciences & Biomedicine
Green & Sustainable Science & Technology
Engineering, Environmental
Environmental Sciences
Science & Technology - Other Topics
Engineering
Environmental Sciences & Ecology
Calcined clay
Supplementary cementitious materials
Pozzolan
Cement
Concrete
POZZOLANIC ACTIVITY
HYDRATION REACTION
THERMAL-STABILITY
METAKAOLIN
MINERALS
CONCRETE
EMISSIONS
STRENGTH
INDUSTRY
KAOLIN
Environmental Sciences
0907 Environmental Engineering
0910 Manufacturing Engineering
0915 Interdisciplinary Engineering
Publication Status
Published
Date Publish Online
2017-09-10