An investigation into the long-term carbonation of vegetal concretes containing a viscosity modifying agent

Joseph Sheridan*, Mohammed Sonebi, Su Taylor, Sofiane Amziane

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

In modern times issues such as sustainability and carbon footprint have become subjects of significant interest on a global scale. A leading industry in greenhouse emissions is the construction industry, and the industry's carbon footprint needs to be reduced in order to meet emissions targets. Hemp concrete and rapeseed concrete are two alternative sustainable building materials that can help the construction sector improve and meet those targets. Because of their relatively recent introduction, limited studies are available on the durability of these materials. This paper investigates the effect of long-term accelerated carbonation on hemp and rapeseed concretes manufactured with a natural cement and, in some cases, a polyacrylic acid viscosity modifying agent (VMA). Natural carbonation in an outdoor environment was also studied. It was found that the mixes carbonated quickly under accelerated conditions, however no impact on mass or specimen dimensions were observed. In the case of the VMA mixes, it was found that the compressive strength of the samples was improved compared to the equivalently aged control samples. However, it was found that compressive strength was actually inhibited in the untreated mixes when compared with the control samples.

Original languageEnglish
Article number123765
JournalConstruction and Building Materials
Volume296
Early online date03 Jun 2021
DOIs
Publication statusPublished - 16 Aug 2021

Bibliographical note

Funding Information:
The authors would like to acknowledge Vicat for supplying the binder in this investigation and Larsen Building Products for supplying the VMA admixture.

Publisher Copyright:
© 2021 Elsevier Ltd

Keywords

  • Carbonation
  • Durability
  • Hemp shiv
  • Rapeseed straw
  • Viscosity modifying agent

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Building and Construction
  • Materials Science(all)

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