Combination of precipitated-calcium carbonate substitution and dilute-alkali fly ash treatment in a very high-volume fly ash cement paste

Wiwik Dwi Pratiwi; Triwulan; Januarti Jaya Ekaputri; Hamzah Fansuri

doi:10.1016/j.conbuildmat.2019.117273

Combination of precipitated-calcium carbonate substitution and dilute-alkali fly ash treatment in a very high-volume fly ash cement paste

Wiwik Dwi Pratiwi^*, Triwulan, Januarti Jaya Ekaputri, Hamzah Fansuri

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

19 Citations (Scopus)

Abstract

Poorer reactivity of fly ash (FA) than Portland cement brings to the problems of low strength and setting time delays of very high-volume fly ash cement paste. This study combines precipitated-calcium carbonate (PCC) substitution and dilute-alkali fly ash treatment for overcoming those drawbacks. The strength was examined at 3-, 7-, 28- and 56-day. Scanning electron microscopy and Fourier-transform infrared spectroscopy were applied for characterisations. PCC substitution improved the strength and shortened the setting time; then additional dilute-alkali fly ash treatment results in better properties. Combination of PCC substitution and dilute-alkali treatment enhances cement hydration and FA pozzolanic reaction simultaneously.

Original language	English
Article number	117273
Journal	Construction and Building Materials
Volume	234
DOIs	https://doi.org/10.1016/j.conbuildmat.2019.117273
Publication status	Published - 20 Feb 2020

Keywords

Alkali activation
Blended cement
C-S-H
Cement hydration
Compressive strength
FTIR
High-volume fly ash
Pozzolanic reaction
Precipitated-calcium carbonate
Si-O bond

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title = "Combination of precipitated-calcium carbonate substitution and dilute-alkali fly ash treatment in a very high-volume fly ash cement paste",

abstract = "Poorer reactivity of fly ash (FA) than Portland cement brings to the problems of low strength and setting time delays of very high-volume fly ash cement paste. This study combines precipitated-calcium carbonate (PCC) substitution and dilute-alkali fly ash treatment for overcoming those drawbacks. The strength was examined at 3-, 7-, 28- and 56-day. Scanning electron microscopy and Fourier-transform infrared spectroscopy were applied for characterisations. PCC substitution improved the strength and shortened the setting time; then additional dilute-alkali fly ash treatment results in better properties. Combination of PCC substitution and dilute-alkali treatment enhances cement hydration and FA pozzolanic reaction simultaneously.",

keywords = "Alkali activation, Blended cement, C-S-H, Cement hydration, Compressive strength, FTIR, High-volume fly ash, Pozzolanic reaction, Precipitated-calcium carbonate, Si-O bond",

author = "Pratiwi, {Wiwik Dwi} and Triwulan and Ekaputri, {Januarti Jaya} and Hamzah Fansuri",

note = "Publisher Copyright: {\textcopyright} 2019 Elsevier Ltd",

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doi = "10.1016/j.conbuildmat.2019.117273",

language = "English",

volume = "234",

journal = "Construction and Building Materials",

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T1 - Combination of precipitated-calcium carbonate substitution and dilute-alkali fly ash treatment in a very high-volume fly ash cement paste

AU - Pratiwi, Wiwik Dwi

AU - Triwulan,

AU - Ekaputri, Januarti Jaya

AU - Fansuri, Hamzah

PY - 2020/2/20

Y1 - 2020/2/20

N2 - Poorer reactivity of fly ash (FA) than Portland cement brings to the problems of low strength and setting time delays of very high-volume fly ash cement paste. This study combines precipitated-calcium carbonate (PCC) substitution and dilute-alkali fly ash treatment for overcoming those drawbacks. The strength was examined at 3-, 7-, 28- and 56-day. Scanning electron microscopy and Fourier-transform infrared spectroscopy were applied for characterisations. PCC substitution improved the strength and shortened the setting time; then additional dilute-alkali fly ash treatment results in better properties. Combination of PCC substitution and dilute-alkali treatment enhances cement hydration and FA pozzolanic reaction simultaneously.

AB - Poorer reactivity of fly ash (FA) than Portland cement brings to the problems of low strength and setting time delays of very high-volume fly ash cement paste. This study combines precipitated-calcium carbonate (PCC) substitution and dilute-alkali fly ash treatment for overcoming those drawbacks. The strength was examined at 3-, 7-, 28- and 56-day. Scanning electron microscopy and Fourier-transform infrared spectroscopy were applied for characterisations. PCC substitution improved the strength and shortened the setting time; then additional dilute-alkali fly ash treatment results in better properties. Combination of PCC substitution and dilute-alkali treatment enhances cement hydration and FA pozzolanic reaction simultaneously.

KW - Alkali activation

KW - Blended cement

KW - C-S-H

KW - Cement hydration

KW - Compressive strength

KW - FTIR

KW - High-volume fly ash

KW - Pozzolanic reaction

KW - Precipitated-calcium carbonate

KW - Si-O bond

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U2 - 10.1016/j.conbuildmat.2019.117273

DO - 10.1016/j.conbuildmat.2019.117273

M3 - Article

AN - SCOPUS:85074206657

SN - 0950-0618

VL - 234

JO - Construction and Building Materials

JF - Construction and Building Materials

M1 - 117273

ER -

Combination of precipitated-calcium carbonate substitution and dilute-alkali fly ash treatment in a very high-volume fly ash cement paste

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Keywords

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