Thermogravimetric analysis and microstructure of alkali-activated metakaolin cement pastes

© 2019, Akadémiai Kiadó, Budapest, Hungary. This study reports the thermogravimetric analysis and microstructure characteristic of alkali-activated metakaolin cement pastes using Na2SiO3-to-NaOH ratio of 1.5. Metakaolin was used at 70, 80, 90, 95 and 100% by total mass of binder, and Portland cement...

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Main Authors: Arnon Chaipanich, Kornnika Wianglor, Manow Piyaworapaiboon, Sakprayut Sinthupinyo
Format: Journal
Published: 2019
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http://cmuir.cmu.ac.th/jspui/handle/6653943832/66630
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Institution: Chiang Mai University
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spelling th-cmuir.6653943832-666302019-09-16T13:00:28Z Thermogravimetric analysis and microstructure of alkali-activated metakaolin cement pastes Arnon Chaipanich Kornnika Wianglor Manow Piyaworapaiboon Sakprayut Sinthupinyo Chemistry Physics and Astronomy © 2019, Akadémiai Kiadó, Budapest, Hungary. This study reports the thermogravimetric analysis and microstructure characteristic of alkali-activated metakaolin cement pastes using Na2SiO3-to-NaOH ratio of 1.5. Metakaolin was used at 70, 80, 90, 95 and 100% by total mass of binder, and Portland cement (ASTM Type I) was used at 0–30% by total mass. Alkali/binder ratio of 1.5 and water curing at 23 °C was used. Thermogravimetric analysis and scanning electron micrographs showed that at 70% metakaolin the major phase found is calcium silicate hydrate (C–S–H) which is normally found in normal water-based cement paste mixes with a slight shoulder peak of N–A–S–H. At higher metakaolin content (80% and higher), sodium aluminium silicate hydrate (N–A–S–H) phase was detected as found in geopolymer, and this is the case in 100% metakaolin mix where essentially only N–A–S–H was found. The compressive strength results were found in the region of 43–48 MPa with higher strength found at higher metakaolin content. Therefore, the results of alkali-activated metakaolin cement paste mixes showed interesting change in the major phase of C–S–H to N–A–S–H depending on amount of Portland cement and metakaolin. 2019-09-16T12:50:00Z 2019-09-16T12:50:00Z 2019-01-01 Journal 15882926 13886150 2-s2.0-85072036279 10.1007/s10973-019-08592-z https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85072036279&origin=inward http://cmuir.cmu.ac.th/jspui/handle/6653943832/66630
institution Chiang Mai University
building Chiang Mai University Library
country Thailand
collection CMU Intellectual Repository
topic Chemistry
Physics and Astronomy
spellingShingle Chemistry
Physics and Astronomy
Arnon Chaipanich
Kornnika Wianglor
Manow Piyaworapaiboon
Sakprayut Sinthupinyo
Thermogravimetric analysis and microstructure of alkali-activated metakaolin cement pastes
description © 2019, Akadémiai Kiadó, Budapest, Hungary. This study reports the thermogravimetric analysis and microstructure characteristic of alkali-activated metakaolin cement pastes using Na2SiO3-to-NaOH ratio of 1.5. Metakaolin was used at 70, 80, 90, 95 and 100% by total mass of binder, and Portland cement (ASTM Type I) was used at 0–30% by total mass. Alkali/binder ratio of 1.5 and water curing at 23 °C was used. Thermogravimetric analysis and scanning electron micrographs showed that at 70% metakaolin the major phase found is calcium silicate hydrate (C–S–H) which is normally found in normal water-based cement paste mixes with a slight shoulder peak of N–A–S–H. At higher metakaolin content (80% and higher), sodium aluminium silicate hydrate (N–A–S–H) phase was detected as found in geopolymer, and this is the case in 100% metakaolin mix where essentially only N–A–S–H was found. The compressive strength results were found in the region of 43–48 MPa with higher strength found at higher metakaolin content. Therefore, the results of alkali-activated metakaolin cement paste mixes showed interesting change in the major phase of C–S–H to N–A–S–H depending on amount of Portland cement and metakaolin.
format Journal
author Arnon Chaipanich
Kornnika Wianglor
Manow Piyaworapaiboon
Sakprayut Sinthupinyo
author_facet Arnon Chaipanich
Kornnika Wianglor
Manow Piyaworapaiboon
Sakprayut Sinthupinyo
author_sort Arnon Chaipanich
title Thermogravimetric analysis and microstructure of alkali-activated metakaolin cement pastes
title_short Thermogravimetric analysis and microstructure of alkali-activated metakaolin cement pastes
title_full Thermogravimetric analysis and microstructure of alkali-activated metakaolin cement pastes
title_fullStr Thermogravimetric analysis and microstructure of alkali-activated metakaolin cement pastes
title_full_unstemmed Thermogravimetric analysis and microstructure of alkali-activated metakaolin cement pastes
title_sort thermogravimetric analysis and microstructure of alkali-activated metakaolin cement pastes
publishDate 2019
url https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85072036279&origin=inward
http://cmuir.cmu.ac.th/jspui/handle/6653943832/66630
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