Potential of CO₂ mitigation in concrete containing recycled aggregates
by Bruno Luís Damineli; Javier Mazariegos Pablos
International Journal of Environment and Sustainable Development (IJESD), Vol. 20, No. 2, 2021

Abstract: The replacement of natural aggregates with recycled ones is a strategy for developing sustainable concrete formulations, which could decrease landfill disposal of construction waste. However, the increase of recycled aggregates (RA) content in concrete frequently leads to an increase in cement content - which is the heaviest environmental burden of concrete due to CO₂ emissions. This study presents a strategy for a better engineered concrete design approach that could allow using RA without increasing cement content. From a more detailed aggregate characterisation, a known particle packing theory could be applied to optimise the concrete packing of particles, allowing a decrease in cement content. The eco-efficiency of cement use was assessed by Binder Index (BI) - the ratio between binder content (environmental load) and compressive strength (performance indicator). Better-engineered concrete could provide similar efficiency of cement use in packed concrete formulations with 100% low-quality RA compared to ordinary ones with 100% natural aggregates.

Online publication date: Tue, 27-Apr-2021

The full text of this article is only available to individual subscribers or to users at subscribing institutions.

 
Existing subscribers:
Go to Inderscience Online Journals to access the Full Text of this article.

Pay per view:
If you are not a subscriber and you just want to read the full contents of this article, buy online access here.

Complimentary Subscribers, Editors or Members of the Editorial Board of the International Journal of Environment and Sustainable Development (IJESD):
Login with your Inderscience username and password:

Username:        Password:          Forgotten your password?

Want to subscribe?
A subscription gives you complete access to all articles in the current issue, as well as to all articles in the previous three years (where applicable). See our Orders page to subscribe.

If you still need assistance, please email subs@inderscience.com