Effect of alkali-activated metakaolin cement on compressive strength of mortars

© 2017 Elsevier B.V. This paper reports the compressive strength and microstructure characteristic of alkali-activated metakaolin (MK) cement under two curing methods. MK was used to replace part of Portland cement (PC) at 70, 80, 85, 90, 95 and 100% by mass of binder. Sodium hydroxide (NaOH) and so...

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Main Authors: Kornnika Wianglor, Sakprayut Sinthupinyo, Manow Piyaworapaiboon, Arnon Chaipanich
Format: Journal
Published: 2018
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http://cmuir.cmu.ac.th/jspui/handle/6653943832/46771
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Institution: Chiang Mai University
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spelling th-cmuir.6653943832-467712018-04-25T07:23:57Z Effect of alkali-activated metakaolin cement on compressive strength of mortars Kornnika Wianglor Sakprayut Sinthupinyo Manow Piyaworapaiboon Arnon Chaipanich Agricultural and Biological Sciences © 2017 Elsevier B.V. This paper reports the compressive strength and microstructure characteristic of alkali-activated metakaolin (MK) cement under two curing methods. MK was used to replace part of Portland cement (PC) at 70, 80, 85, 90, 95 and 100% by mass of binder. Sodium hydroxide (NaOH) and sodium silicate (Na 2 SiO 3 ) were used as activating agents (Na 2 SiO 3 to NaOH ratio of 0.67). NaOH with 10 molar concentrations, liquid alkali/binder ratio of 0.8 and water base was used. Mortar and paste specimens were cured at 23 ± 2°C (55% RH) and 60°C (95% RH). The results indicated that calcium silicate hydrate (C–S–H) and calcium carbonate (CaCO 3 ) phases were detected by thermogravimetry (TGA). Setting time and drying shrinkage decreased when metakaolin replacement level increased, the compressive strength of alkali-activated metakaolin cement increased with the increase of PC content and increased with temperature. The curing of specimens at 60°C (95% RH) enhanced the compressive strength, matrices appeared denser than when cured at 23 ± 2°C (55% RH) and phases of (C, N)-A-S-H gel and or C–S–H gel can be seen clearly. 2018-04-25T07:00:56Z 2018-04-25T07:00:56Z 2017-06-01 Journal 01691317 2-s2.0-85014606864 10.1016/j.clay.2017.01.025 https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85014606864&origin=inward http://cmuir.cmu.ac.th/jspui/handle/6653943832/46771
institution Chiang Mai University
building Chiang Mai University Library
country Thailand
collection CMU Intellectual Repository
topic Agricultural and Biological Sciences
spellingShingle Agricultural and Biological Sciences
Kornnika Wianglor
Sakprayut Sinthupinyo
Manow Piyaworapaiboon
Arnon Chaipanich
Effect of alkali-activated metakaolin cement on compressive strength of mortars
description © 2017 Elsevier B.V. This paper reports the compressive strength and microstructure characteristic of alkali-activated metakaolin (MK) cement under two curing methods. MK was used to replace part of Portland cement (PC) at 70, 80, 85, 90, 95 and 100% by mass of binder. Sodium hydroxide (NaOH) and sodium silicate (Na 2 SiO 3 ) were used as activating agents (Na 2 SiO 3 to NaOH ratio of 0.67). NaOH with 10 molar concentrations, liquid alkali/binder ratio of 0.8 and water base was used. Mortar and paste specimens were cured at 23 ± 2°C (55% RH) and 60°C (95% RH). The results indicated that calcium silicate hydrate (C–S–H) and calcium carbonate (CaCO 3 ) phases were detected by thermogravimetry (TGA). Setting time and drying shrinkage decreased when metakaolin replacement level increased, the compressive strength of alkali-activated metakaolin cement increased with the increase of PC content and increased with temperature. The curing of specimens at 60°C (95% RH) enhanced the compressive strength, matrices appeared denser than when cured at 23 ± 2°C (55% RH) and phases of (C, N)-A-S-H gel and or C–S–H gel can be seen clearly.
format Journal
author Kornnika Wianglor
Sakprayut Sinthupinyo
Manow Piyaworapaiboon
Arnon Chaipanich
author_facet Kornnika Wianglor
Sakprayut Sinthupinyo
Manow Piyaworapaiboon
Arnon Chaipanich
author_sort Kornnika Wianglor
title Effect of alkali-activated metakaolin cement on compressive strength of mortars
title_short Effect of alkali-activated metakaolin cement on compressive strength of mortars
title_full Effect of alkali-activated metakaolin cement on compressive strength of mortars
title_fullStr Effect of alkali-activated metakaolin cement on compressive strength of mortars
title_full_unstemmed Effect of alkali-activated metakaolin cement on compressive strength of mortars
title_sort effect of alkali-activated metakaolin cement on compressive strength of mortars
publishDate 2018
url https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85014606864&origin=inward
http://cmuir.cmu.ac.th/jspui/handle/6653943832/46771
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