Development of a zero-cement binder using slag, fly ash, and rice husk ash with chemical activator

M. R. Karim, Muhammad Fauzi Mohd. Zain, Maslina Jamil, F. C. Lai

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

The increasing demand and consumption of cement have necessitated the use of slag, fly ash, rice husk ash (RHA), and so forth as a supplement of cement in concrete construction. The aim of the study is to develop a zero-cement binder (Z-Cem) using slag, fly ash, and RHA combined with chemical activator. NaOH, Ca(OH)<inf>2</inf>, and KOH were used in varying weights and molar concentrations. Z-Cem was tested for its consistency, setting time, flow, compressive strength, XRD, SEM, and FTIR. The consistency and setting time of the Z-Cem paste increase with increasing RHA content. The Z-Cem mortar requires more superplasticizer to maintain a constant flow of 110 ± 5 % compared with OPC. The compressive strength of the Z-Cem mortar is significantly influenced by the amounts, types, and molar concentration of the activators. The Z-Cem mortar achieves a compressive strength of 42-44 MPa at 28 days with 5% NaOH or at 2.5 molar concentrations. The FTIR results reveal that molecules in the Z-Cem mortar have a silica-hydrate (Si-H) bond with sodium or other inorganic metals (i.e., sodium/calcium-silica-hydrate-alumina gel). Therefore, Z-Cem could be developed using the aforementioned materials with the chemical activator.

Original languageEnglish
Article number247065
JournalAdvances in Materials Science and Engineering
Volume2015
DOIs
Publication statusPublished - 2015

Fingerprint

Ashes
Coal Ash
Fly ash
Slags
Binders
Cements
Mortar
Silicic Acid
Compressive strength
Hydrates
Sodium
Silica
Adhesive pastes
Aluminum Oxide
Ointments

ASJC Scopus subject areas

  • Materials Science(all)
  • Engineering(all)

Cite this

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title = "Development of a zero-cement binder using slag, fly ash, and rice husk ash with chemical activator",
abstract = "The increasing demand and consumption of cement have necessitated the use of slag, fly ash, rice husk ash (RHA), and so forth as a supplement of cement in concrete construction. The aim of the study is to develop a zero-cement binder (Z-Cem) using slag, fly ash, and RHA combined with chemical activator. NaOH, Ca(OH)2, and KOH were used in varying weights and molar concentrations. Z-Cem was tested for its consistency, setting time, flow, compressive strength, XRD, SEM, and FTIR. The consistency and setting time of the Z-Cem paste increase with increasing RHA content. The Z-Cem mortar requires more superplasticizer to maintain a constant flow of 110 ± 5 {\%} compared with OPC. The compressive strength of the Z-Cem mortar is significantly influenced by the amounts, types, and molar concentration of the activators. The Z-Cem mortar achieves a compressive strength of 42-44 MPa at 28 days with 5{\%} NaOH or at 2.5 molar concentrations. The FTIR results reveal that molecules in the Z-Cem mortar have a silica-hydrate (Si-H) bond with sodium or other inorganic metals (i.e., sodium/calcium-silica-hydrate-alumina gel). Therefore, Z-Cem could be developed using the aforementioned materials with the chemical activator.",
author = "Karim, {M. R.} and {Mohd. Zain}, {Muhammad Fauzi} and Maslina Jamil and Lai, {F. C.}",
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AU - Lai, F. C.

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