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 language | English |
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Pages (from-to) | 59-69 |
Number of pages | 11 |
Journal | Construction and Building Materials |
Volume | 207 |
Early online date | 23 Feb 2019 |
DOIs | |
Publication status | Published - 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)