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Evaluation of structural performances of metakaolin based geopolymer concrete ; Hodnocení strukturálních vlastností geopolymerního betonu na bázi metakaolinu
Last few decades, there has been a substantial advancement of geopolymer (GP) as a Portland cement substitute. It is vital to investigate potential building uses for geopolymer concrete (GPC). Six different mixes were cast for an alkaline to binder (A/B) ratio of 0.25-0.50 with an interval of 0.05. Metakaolin-based geopolymer were cured at ambient tem-perature and tested for 7, 14, 28, and 90 days. Metakaolin-Marble (MM00) mix was observed to have a maximum slump. For an A/B ratio of 0.35, maximum compressive, split tensile, flexural strength and modulus of elasticity was achieved. For elevated temperature resis-tance, geopolymer concrete cubes were exposed to temperatures (T) of 200, 400, to 600 C. As the temperature increased, compressive strength (CS) reduced. As the increase of the alkaline to binder (A/B) ratio, the strength of geopolymer concrete increases up to a specific limit beyond the limit strength decline. An empirical formula for split tensile (STS) value prediction using compressive strength values is proposed, valid for determining split tensile strength value. The correlation between compressive strength, split tensile strength, flexural strength, and bulk density varies linearly for a quadratic polynomial.(c) 2022 The Author(s). Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/). ; V posledních několika desetiletích došlo k podstatnému rozvoji geopolymeru (GP) jako náhrady portlandského cementu. Je nezbytné prozkoumat potenciální využití geopolymerního betonu (GPC) ve stavebnictví. Bylo odlito šest různých směsí pro poměr alkálie k pojivu (A/B) 0,25-0,50 s intervalem 0,05. Geopolymer na bázi metakaolinu byl vytvrzen při okolní teplotě a testován po dobu 7, 14, 28 a 90 dnů. Bylo pozorováno, že směs metakaolin-mramor (MM00) má maximální propad. Pro poměr A/B 0,35 bylo dosaženo maximálního tlaku, pevnosti v tahu, pevnosti v ohybu a modulu pružnosti. Pro zvýšenou teplotní odolnost byly geopolymerní betonové ...
Evaluation of structural performances of metakaolin based geopolymer concrete ; Hodnocení strukturálních vlastností geopolymerního betonu na bázi metakaolinu
Last few decades, there has been a substantial advancement of geopolymer (GP) as a Portland cement substitute. It is vital to investigate potential building uses for geopolymer concrete (GPC). Six different mixes were cast for an alkaline to binder (A/B) ratio of 0.25-0.50 with an interval of 0.05. Metakaolin-based geopolymer were cured at ambient tem-perature and tested for 7, 14, 28, and 90 days. Metakaolin-Marble (MM00) mix was observed to have a maximum slump. For an A/B ratio of 0.35, maximum compressive, split tensile, flexural strength and modulus of elasticity was achieved. For elevated temperature resis-tance, geopolymer concrete cubes were exposed to temperatures (T) of 200, 400, to 600 C. As the temperature increased, compressive strength (CS) reduced. As the increase of the alkaline to binder (A/B) ratio, the strength of geopolymer concrete increases up to a specific limit beyond the limit strength decline. An empirical formula for split tensile (STS) value prediction using compressive strength values is proposed, valid for determining split tensile strength value. The correlation between compressive strength, split tensile strength, flexural strength, and bulk density varies linearly for a quadratic polynomial.(c) 2022 The Author(s). Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/). ; V posledních několika desetiletích došlo k podstatnému rozvoji geopolymeru (GP) jako náhrady portlandského cementu. Je nezbytné prozkoumat potenciální využití geopolymerního betonu (GPC) ve stavebnictví. Bylo odlito šest různých směsí pro poměr alkálie k pojivu (A/B) 0,25-0,50 s intervalem 0,05. Geopolymer na bázi metakaolinu byl vytvrzen při okolní teplotě a testován po dobu 7, 14, 28 a 90 dnů. Bylo pozorováno, že směs metakaolin-mramor (MM00) má maximální propad. Pro poměr A/B 0,35 bylo dosaženo maximálního tlaku, pevnosti v tahu, pevnosti v ohybu a modulu pružnosti. Pro zvýšenou teplotní odolnost byly geopolymerní betonové ...
Evaluation of structural performances of metakaolin based geopolymer concrete ; Hodnocení strukturálních vlastností geopolymerního betonu na bázi metakaolinu
Shilar, Fatheali A (author) / V. Ganachari, Sharanabasava (author) / Patil, Veerabhadragouda B. (author) / Nisar, Kottakkaran Sooppy (author)
2022-01-01
39887747
Article (Journal)
Electronic Resource
English
DDC:
690
Metakaolin-based geopolymer for repairing concrete cracks
| European Patent Office | 2020