Low Carbon Recycled Aggregate Concrete: Roles of Slag and Silica Fume

Yara Mouna*, Mustafa Batikha, Benny Suryanto

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)
28 Downloads (Pure)

Abstract

Recycled coarse aggregate from construction demolition waste offers a promising and sustainable solution to overcome challenges facing the construction industry, in relation to the increasing landfill areas, decreasing natural aggregate reserves, and increasing environmental impact of concrete production. Previous studies have shown that recycled aggregate concretes (RAC) are, however, more susceptible to deterioration. This paper presents an experimental investigation to improve the performance of concretes manufactured with locally produced recycled coarse aggregate in the UAE. More specifically, it aims to investigate the potential of incorporating ground granulated blast-furnace slag (GGBS) and silica fume (SF) in RACs, and their influence on key engineering properties of concrete. It is shown that partial replacement of Portland cement with GGBS and SF is effective to reduce the resistance of RAC to chloride ion penetration (hence durability), and lower the drying shrinkage and CO2 emissions, with minimal influence on the long-term mechanical properties. A reduction of approximately 40% in CO2 emissions was found in a concrete mix with combined replacement of recycled and waste materials.

Original languageEnglish
Title of host publication8th Zero Energy Mass Custom Home International Conference 2021
EditorsKheira Anissa Tabet Aoul, Mohammed Tariq Shafiq, Daniel Efurosibina Attoye
PublisherZEMCH Network
Pages1063-1074
Number of pages12
ISBN (Electronic)9789948310006
Publication statusPublished - 2021
Event8th Zero Energy Mass Custom Home International Conference 2021 - Dubai, United Arab Emirates
Duration: 26 Oct 202128 Oct 2021

Publication series

NameZEMCH International Conference
ISSN (Electronic)2652-2926

Conference

Conference8th Zero Energy Mass Custom Home International Conference 2021
Abbreviated titleZEMCH 2021
Country/TerritoryUnited Arab Emirates
CityDubai
Period26/10/2128/10/21

Keywords

  • CO2 emission
  • Durability
  • GGBS
  • Recycled coarse aggregate
  • Silica fume

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Safety, Risk, Reliability and Quality
  • Building and Construction
  • Architecture
  • Renewable Energy, Sustainability and the Environment
  • Computer Science Applications

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