The influence of CO2 accelerated carbonation on alkali-activated fly ash cement under elevated temperature and pressure: Einfluss von CO2 beschleunigter Karbonisierung auf alkalisch aktivierten Flugaschezement unter erhöhter Temperatur und erhöhtem Druck

An alternative of wellbore cement system, formed through alkali-activation of fly ashes also knows as fly ash geopolymers, provides attractive properties due to its high compressive strength and durability against acidic conditions. However, changes in microstructure and mineralogical during acceler...

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Main Authors: Ridha, S., Setiawan, R.A., Hamid, A.I.A., Shahari, A.R.
Format: Article
Published: Wiley-VCH Verlag 2018
Online Access:https://www.scopus.com/inward/record.uri?eid=2-s2.0-85045968560&doi=10.1002%2fmawe.201800029&partnerID=40&md5=618c939a943c4e244b00c7b6d7bc763c
http://eprints.utp.edu.my/21635/
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spelling my.utp.eprints.216352018-08-01T02:56:22Z The influence of CO2 accelerated carbonation on alkali-activated fly ash cement under elevated temperature and pressure: Einfluss von CO2 beschleunigter Karbonisierung auf alkalisch aktivierten Flugaschezement unter erhöhter Temperatur und erhöhtem Druck Ridha, S. Setiawan, R.A. Hamid, A.I.A. Shahari, A.R. An alternative of wellbore cement system, formed through alkali-activation of fly ashes also knows as fly ash geopolymers, provides attractive properties due to its high compressive strength and durability against acidic conditions. However, changes in microstructure and mineralogical during accelerated carbonation affected by CO2 alteration under elevated temperature and pressure have not been fully understood. This paper investigates and characterizes the alkali-activated binders fly ash based in the acidic environment under elevated temperature and pressure. The results found that scales such a layer was formed in the gel phase at the spherical surface of fly ash after carbonation process. The effect is that the surface of the gel phase became rough and porous. Carbonate and/or bicarbonate salts were identified as major phase in the sample after immersion test. In the activated fly ash cement, both calcium aluminate silicate hydrate (C�A�S�H) and sodium aluminosilicate hydrate (N�A�S�H) gels were formed; C�A�S�H gel was decalcified, forming calcium carbonate phase in the form of calcite, aragonite or vaterite. These findings were confirmed by the analysis and identification of Fourier-transformed infrared spectroscopy, X-ray diffraction and scanning electron microscopy tests on the changes in the cement system. © 2018 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim Wiley-VCH Verlag 2018 Article NonPeerReviewed https://www.scopus.com/inward/record.uri?eid=2-s2.0-85045968560&doi=10.1002%2fmawe.201800029&partnerID=40&md5=618c939a943c4e244b00c7b6d7bc763c Ridha, S. and Setiawan, R.A. and Hamid, A.I.A. and Shahari, A.R. (2018) The influence of CO2 accelerated carbonation on alkali-activated fly ash cement under elevated temperature and pressure: Einfluss von CO2 beschleunigter Karbonisierung auf alkalisch aktivierten Flugaschezement unter erhöhter Temperatur und erhöhtem Druck. Materialwissenschaft und Werkstofftechnik, 49 (4). pp. 483-488. http://eprints.utp.edu.my/21635/
institution Universiti Teknologi Petronas
building UTP Resource Centre
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Teknologi Petronas
content_source UTP Institutional Repository
url_provider http://eprints.utp.edu.my/
description An alternative of wellbore cement system, formed through alkali-activation of fly ashes also knows as fly ash geopolymers, provides attractive properties due to its high compressive strength and durability against acidic conditions. However, changes in microstructure and mineralogical during accelerated carbonation affected by CO2 alteration under elevated temperature and pressure have not been fully understood. This paper investigates and characterizes the alkali-activated binders fly ash based in the acidic environment under elevated temperature and pressure. The results found that scales such a layer was formed in the gel phase at the spherical surface of fly ash after carbonation process. The effect is that the surface of the gel phase became rough and porous. Carbonate and/or bicarbonate salts were identified as major phase in the sample after immersion test. In the activated fly ash cement, both calcium aluminate silicate hydrate (C�A�S�H) and sodium aluminosilicate hydrate (N�A�S�H) gels were formed; C�A�S�H gel was decalcified, forming calcium carbonate phase in the form of calcite, aragonite or vaterite. These findings were confirmed by the analysis and identification of Fourier-transformed infrared spectroscopy, X-ray diffraction and scanning electron microscopy tests on the changes in the cement system. © 2018 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim
format Article
author Ridha, S.
Setiawan, R.A.
Hamid, A.I.A.
Shahari, A.R.
spellingShingle Ridha, S.
Setiawan, R.A.
Hamid, A.I.A.
Shahari, A.R.
The influence of CO2 accelerated carbonation on alkali-activated fly ash cement under elevated temperature and pressure: Einfluss von CO2 beschleunigter Karbonisierung auf alkalisch aktivierten Flugaschezement unter erhöhter Temperatur und erhöhtem Druck
author_facet Ridha, S.
Setiawan, R.A.
Hamid, A.I.A.
Shahari, A.R.
author_sort Ridha, S.
title The influence of CO2 accelerated carbonation on alkali-activated fly ash cement under elevated temperature and pressure: Einfluss von CO2 beschleunigter Karbonisierung auf alkalisch aktivierten Flugaschezement unter erhöhter Temperatur und erhöhtem Druck
title_short The influence of CO2 accelerated carbonation on alkali-activated fly ash cement under elevated temperature and pressure: Einfluss von CO2 beschleunigter Karbonisierung auf alkalisch aktivierten Flugaschezement unter erhöhter Temperatur und erhöhtem Druck
title_full The influence of CO2 accelerated carbonation on alkali-activated fly ash cement under elevated temperature and pressure: Einfluss von CO2 beschleunigter Karbonisierung auf alkalisch aktivierten Flugaschezement unter erhöhter Temperatur und erhöhtem Druck
title_fullStr The influence of CO2 accelerated carbonation on alkali-activated fly ash cement under elevated temperature and pressure: Einfluss von CO2 beschleunigter Karbonisierung auf alkalisch aktivierten Flugaschezement unter erhöhter Temperatur und erhöhtem Druck
title_full_unstemmed The influence of CO2 accelerated carbonation on alkali-activated fly ash cement under elevated temperature and pressure: Einfluss von CO2 beschleunigter Karbonisierung auf alkalisch aktivierten Flugaschezement unter erhöhter Temperatur und erhöhtem Druck
title_sort influence of co2 accelerated carbonation on alkali-activated fly ash cement under elevated temperature and pressure: einfluss von co2 beschleunigter karbonisierung auf alkalisch aktivierten flugaschezement unter erhã¶hter temperatur und erhã¶htem druck
publisher Wiley-VCH Verlag
publishDate 2018
url https://www.scopus.com/inward/record.uri?eid=2-s2.0-85045968560&doi=10.1002%2fmawe.201800029&partnerID=40&md5=618c939a943c4e244b00c7b6d7bc763c
http://eprints.utp.edu.my/21635/
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