Impact of Al(OH)3 addition to POFA on the compressive strength of POFA alkali-activated mortar

Babatunde Abiodun Salami; Megat Azmi Megat Johari; Zainal Arifin Ahmad; Mohammed Maslehuddin; Adeshina Adewale Adewumi

doi:10.1016/j.conbuildmat.2018.09.076

Impact of Al(OH)₃ addition to POFA on the compressive strength of POFA alkali-activated mortar

Babatunde Abiodun Salami^*
, Megat Azmi Megat Johari
, Zainal Arifin Ahmad
, Mohammed Maslehuddin
, Adeshina Adewale Adewumi

^*Corresponding author for this work

Applied Research Center for Metrology, Standards and Testing

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

27 Scopus citations

Abstract

The study reports the influence of Al(OH)₃ as alumina source on the compressive strength of POFA alkali-activated mortar (POFA AAM). The synthesis of the developed POFA AAM stems from the mixture proportioning of Na₂SiO_3(aq), NaOH_(aq), POFA and Al(OH)₃. At the 28th day, after 65 °C heat and laboratory curing, the compressive strength of the POFA AAM were tested. It was observed that the compressive strength of all the POFA AAM specimens with Al(OH)₃ addition were lower than those of the specimens without Al(OH)₃ addition. The only exception was with the POFA AAM at 2% Al(OH)₃ addition in all NaOH molarities. The compressive strength losses recorded in some POFA AAM were due to weak interfacial zones creation between the activated products and the zeolitic phases, which became more apparent at higher Al(OH)₃ additions. The strength development of the POFA AAM microstructure was studied with the aid of SEM/EDS, XRD and FTIR.

Original language	English
Pages (from-to)	65-82
Number of pages	18
Journal	Construction and Building Materials
Volume	190
DOIs	https://doi.org/10.1016/j.conbuildmat.2018.09.076
State	Published - 30 Nov 2018

Bibliographical note

Publisher Copyright:
© 2018 Elsevier Ltd

ASJC Scopus subject areas

Civil and Structural Engineering
Building and Construction
General Materials Science

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10.1016/j.conbuildmat.2018.09.076

Cite this

@article{4d4775e031f94e89a23911ab91b9d5ac,

title = "Impact of Al(OH)3 addition to POFA on the compressive strength of POFA alkali-activated mortar",

abstract = "The study reports the influence of Al(OH)3 as alumina source on the compressive strength of POFA alkali-activated mortar (POFA AAM). The synthesis of the developed POFA AAM stems from the mixture proportioning of Na2SiO3(aq), NaOH(aq), POFA and Al(OH)3. At the 28th day, after 65 °C heat and laboratory curing, the compressive strength of the POFA AAM were tested. It was observed that the compressive strength of all the POFA AAM specimens with Al(OH)3 addition were lower than those of the specimens without Al(OH)3 addition. The only exception was with the POFA AAM at 2\% Al(OH)3 addition in all NaOH molarities. The compressive strength losses recorded in some POFA AAM were due to weak interfacial zones creation between the activated products and the zeolitic phases, which became more apparent at higher Al(OH)3 additions. The strength development of the POFA AAM microstructure was studied with the aid of SEM/EDS, XRD and FTIR.",

author = "Salami, \{Babatunde Abiodun\} and \{Megat Johari\}, \{Megat Azmi\} and Ahmad, \{Zainal Arifin\} and Mohammed Maslehuddin and Adewumi, \{Adeshina Adewale\}",

note = "Publisher Copyright: {\textcopyright} 2018 Elsevier Ltd",

year = "2018",

month = nov,

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doi = "10.1016/j.conbuildmat.2018.09.076",

language = "English",

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T1 - Impact of Al(OH)3 addition to POFA on the compressive strength of POFA alkali-activated mortar

AU - Salami, Babatunde Abiodun

AU - Megat Johari, Megat Azmi

AU - Ahmad, Zainal Arifin

AU - Maslehuddin, Mohammed

AU - Adewumi, Adeshina Adewale

PY - 2018/11/30

Y1 - 2018/11/30

N2 - The study reports the influence of Al(OH)3 as alumina source on the compressive strength of POFA alkali-activated mortar (POFA AAM). The synthesis of the developed POFA AAM stems from the mixture proportioning of Na2SiO3(aq), NaOH(aq), POFA and Al(OH)3. At the 28th day, after 65 °C heat and laboratory curing, the compressive strength of the POFA AAM were tested. It was observed that the compressive strength of all the POFA AAM specimens with Al(OH)3 addition were lower than those of the specimens without Al(OH)3 addition. The only exception was with the POFA AAM at 2% Al(OH)3 addition in all NaOH molarities. The compressive strength losses recorded in some POFA AAM were due to weak interfacial zones creation between the activated products and the zeolitic phases, which became more apparent at higher Al(OH)3 additions. The strength development of the POFA AAM microstructure was studied with the aid of SEM/EDS, XRD and FTIR.

AB - The study reports the influence of Al(OH)3 as alumina source on the compressive strength of POFA alkali-activated mortar (POFA AAM). The synthesis of the developed POFA AAM stems from the mixture proportioning of Na2SiO3(aq), NaOH(aq), POFA and Al(OH)3. At the 28th day, after 65 °C heat and laboratory curing, the compressive strength of the POFA AAM were tested. It was observed that the compressive strength of all the POFA AAM specimens with Al(OH)3 addition were lower than those of the specimens without Al(OH)3 addition. The only exception was with the POFA AAM at 2% Al(OH)3 addition in all NaOH molarities. The compressive strength losses recorded in some POFA AAM were due to weak interfacial zones creation between the activated products and the zeolitic phases, which became more apparent at higher Al(OH)3 additions. The strength development of the POFA AAM microstructure was studied with the aid of SEM/EDS, XRD and FTIR.

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