Fine aggregate substitution with acidified granular activated carbon influences fresh-state and mechanical properties of ordinary Portland cement mortars

Ismael Justo-Reinoso, Alejandro Caicedo-Ramirez, Wil V. Srubar, Mark T. Hernandez

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)

Abstract

The compressive strength and selected fresh-state responses to incorporating acid-modified granular activated carbon (GAC) in cement mortars, were compared to physical cement behaviors associated with the incorporation of otherwise unmodified GAC and a commercial polycarboxylate superplasticizer. Specific surface area of unmodified and acidified GAC, porosity, pH at charge neutrality (pH PZC ), and surface-associated functional groups were compared. Fresh- and hardened-state responses were observed, including slump, setting time, zeta potential, and compressive strength. Results suggest that substituting 1% of the fine aggregate mass with GAC particles that had been pre-treated in nitric acid, can improve compressive strength and workability of cement mortar.

Original languageEnglish
Pages (from-to)59-69
Number of pages11
JournalConstruction and Building Materials
Volume207
Early online date23 Feb 2019
DOIs
Publication statusPublished - 20 May 2019

Keywords

  • Acidified activated carbon
  • Cement mortar
  • FTIR
  • Polycarboxylate-ether
  • Superplasticizer
  • Workability
  • Zeta potential

ASJC Scopus subject areas

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

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