Effects of H2O/Na2O molar ratio on the strength of alkaline activated ground blast furnace slag-ultrafine palm oil fuel ash based concrete

Moruf Olalekan Yusuf; Megat Azmi Megat Johari; Zainal Arifin Ahmad; Mohammed Maslehuddin

doi:10.1016/j.matdes.2013.09.078

Effects of H₂O/Na₂O molar ratio on the strength of alkaline activated ground blast furnace slag-ultrafine palm oil fuel ash based concrete

Moruf Olalekan Yusuf, Megat Azmi Megat Johari^*, Zainal Arifin Ahmad, Mohammed Maslehuddin

^*Corresponding author for this work

Applied Research Center for Metrology, Standards and Testing

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

76 Scopus citations

Abstract

Effects of H₂O/Na₂O molar ratios (MRs) on the developed alkaline activated pozzolanic solid wastes (PMs)-ultrafine palm oil fuel ash (UPOFA) and ground blast furnace slag (GBFS)-were studied by using the constant mass of combined activators (10M NaOH_aq+Na₂SiO_3aq of silica-modulus (Ms=SiO₂/Na₂O) of 3.3).The free water content (FWC) expressed as FWC/(PMs) varied from 0.02 to 0.1 by mass while the total H₂O/Na₂O MRs ranged from 18.9 to 23.1 The findings revealed that increase in H₂O/Na₂O MRs negatively affects the strength but positively impact the mixture workability (consistency). The microstructural morphology examination using Scanning Electron Microscope coupled with Energy dispersive spectroscopy (SEM+EDS) reveals the contribution of H₂O/Na₂O MRs to the product nature, compactness, and the reactivity of Ca²⁺ and Al³⁺ while Fourier transform infra-red (FTIR) spectroscopy indicates that H₂O/Na₂O ratios contributed to the product amorphousity and carbonation process but sparingly affected its formed polymerized structural units (SiQⁿ(mAl), n=2 and 3).

Original language	English
Pages (from-to)	158-164
Number of pages	7
Journal	Materials and Design
Volume	56
DOIs	https://doi.org/10.1016/j.matdes.2013.09.078
State	Published - Apr 2014

Bibliographical note

Funding Information:
The authors gratefully acknowledge the Universiti Sains Malaysia for providing the financial support through the Research University (1001/PAWAM/814103) Scheme for undertaking the research work. The supports from Center of Engineering Research (CER) of Research Institute, King Fahd University of Petroleum and Minerals, Dhahran, Saudi Arabia are specially acknowledged. Thanks are also due to United Palm Oil Industries and Southern Steel Company for providing the palm oil fuel ash and blast furnace slag, respectively.

Keywords

Compressive-strength
Fourier-transform-infra-red-spectroscopy
Ground-blast-furnace-slag
Palm-oil-fuel-ash
Scanning-electron-microscopy

ASJC Scopus subject areas

General Materials Science
Mechanics of Materials
Mechanical Engineering

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

Access to Document

10.1016/j.matdes.2013.09.078

Cite this

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title = "Effects of H2O/Na2O molar ratio on the strength of alkaline activated ground blast furnace slag-ultrafine palm oil fuel ash based concrete",

abstract = "Effects of H2O/Na2O molar ratios (MRs) on the developed alkaline activated pozzolanic solid wastes (PMs)-ultrafine palm oil fuel ash (UPOFA) and ground blast furnace slag (GBFS)-were studied by using the constant mass of combined activators (10M NaOHaq+Na2SiO3aq of silica-modulus (Ms=SiO2/Na2O) of 3.3).The free water content (FWC) expressed as FWC/(PMs) varied from 0.02 to 0.1 by mass while the total H2O/Na2O MRs ranged from 18.9 to 23.1 The findings revealed that increase in H2O/Na2O MRs negatively affects the strength but positively impact the mixture workability (consistency). The microstructural morphology examination using Scanning Electron Microscope coupled with Energy dispersive spectroscopy (SEM+EDS) reveals the contribution of H2O/Na2O MRs to the product nature, compactness, and the reactivity of Ca2+ and Al3+ while Fourier transform infra-red (FTIR) spectroscopy indicates that H2O/Na2O ratios contributed to the product amorphousity and carbonation process but sparingly affected its formed polymerized structural units (SiQn(mAl), n=2 and 3).",

keywords = "Compressive-strength, Fourier-transform-infra-red-spectroscopy, Ground-blast-furnace-slag, Palm-oil-fuel-ash, Scanning-electron-microscopy",

author = "Yusuf, \{Moruf Olalekan\} and \{Megat Johari\}, \{Megat Azmi\} and Ahmad, \{Zainal Arifin\} and Mohammed Maslehuddin",

note = "Funding Information: The authors gratefully acknowledge the Universiti Sains Malaysia for providing the financial support through the Research University (1001/PAWAM/814103) Scheme for undertaking the research work. The supports from Center of Engineering Research (CER) of Research Institute, King Fahd University of Petroleum and Minerals, Dhahran, Saudi Arabia are specially acknowledged. Thanks are also due to United Palm Oil Industries and Southern Steel Company for providing the palm oil fuel ash and blast furnace slag, respectively.",

year = "2014",

month = apr,

doi = "10.1016/j.matdes.2013.09.078",

language = "English",

volume = "56",

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journal = "Materials and Design",

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AU - Yusuf, Moruf Olalekan

AU - Megat Johari, Megat Azmi

AU - Ahmad, Zainal Arifin

AU - Maslehuddin, Mohammed

N1 - Funding Information: The authors gratefully acknowledge the Universiti Sains Malaysia for providing the financial support through the Research University (1001/PAWAM/814103) Scheme for undertaking the research work. The supports from Center of Engineering Research (CER) of Research Institute, King Fahd University of Petroleum and Minerals, Dhahran, Saudi Arabia are specially acknowledged. Thanks are also due to United Palm Oil Industries and Southern Steel Company for providing the palm oil fuel ash and blast furnace slag, respectively.

PY - 2014/4

Y1 - 2014/4

N2 - Effects of H2O/Na2O molar ratios (MRs) on the developed alkaline activated pozzolanic solid wastes (PMs)-ultrafine palm oil fuel ash (UPOFA) and ground blast furnace slag (GBFS)-were studied by using the constant mass of combined activators (10M NaOHaq+Na2SiO3aq of silica-modulus (Ms=SiO2/Na2O) of 3.3).The free water content (FWC) expressed as FWC/(PMs) varied from 0.02 to 0.1 by mass while the total H2O/Na2O MRs ranged from 18.9 to 23.1 The findings revealed that increase in H2O/Na2O MRs negatively affects the strength but positively impact the mixture workability (consistency). The microstructural morphology examination using Scanning Electron Microscope coupled with Energy dispersive spectroscopy (SEM+EDS) reveals the contribution of H2O/Na2O MRs to the product nature, compactness, and the reactivity of Ca2+ and Al3+ while Fourier transform infra-red (FTIR) spectroscopy indicates that H2O/Na2O ratios contributed to the product amorphousity and carbonation process but sparingly affected its formed polymerized structural units (SiQn(mAl), n=2 and 3).

AB - Effects of H2O/Na2O molar ratios (MRs) on the developed alkaline activated pozzolanic solid wastes (PMs)-ultrafine palm oil fuel ash (UPOFA) and ground blast furnace slag (GBFS)-were studied by using the constant mass of combined activators (10M NaOHaq+Na2SiO3aq of silica-modulus (Ms=SiO2/Na2O) of 3.3).The free water content (FWC) expressed as FWC/(PMs) varied from 0.02 to 0.1 by mass while the total H2O/Na2O MRs ranged from 18.9 to 23.1 The findings revealed that increase in H2O/Na2O MRs negatively affects the strength but positively impact the mixture workability (consistency). The microstructural morphology examination using Scanning Electron Microscope coupled with Energy dispersive spectroscopy (SEM+EDS) reveals the contribution of H2O/Na2O MRs to the product nature, compactness, and the reactivity of Ca2+ and Al3+ while Fourier transform infra-red (FTIR) spectroscopy indicates that H2O/Na2O ratios contributed to the product amorphousity and carbonation process but sparingly affected its formed polymerized structural units (SiQn(mAl), n=2 and 3).

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KW - Fourier-transform-infra-red-spectroscopy

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