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Effect of Volcanic Ash Used as Supplementary Cementitious Materials on Mortar Strength and Durability
https://orcid.org/http://orcid.org/0009-0004-5017-7290
https://orcid.org/http://orcid.org/0000-0002-1495-2155
https://orcid.org/http://orcid.org/0000-0003-2815-1444
https://orcid.org/http://orcid.org/0000-0002-8633-4305
The significant CO2 emission during cement production requires strategies for a more sustainable future. One approach is to replace the cement fraction with other materials partially. Volcanic ash can be used as supplementary cementitious materials (SCMs) due to the pozzolanic reactivity. In this study, the use of three volcanic ashes as SCMs were examined using samples from Laacher See (Germany), Etna (Italy), and Tungurahua (Ecuador) volcanoes, respectively. Mortar mixtures were prepared with 20 wt.-% of ordinary Portland cement (OPC) replaced by volcanic ash and compared to reference mixtures containing 100 wt.-% OPC or 20 wt.-% limestone powder as inert filler. After 90 days, Volcanic ash mortars reached comparable compressive and flexural strength levels to the OPC reference mortar, with no replacement. In addition, three different methods were used to determine the chloride penetration resistance of the hardened mortars. The chloride penetration resistance of all volcanic ash blended mortar samples was higher than the reference mortar after 90 days. The results show that all tested volcanic ashes can be used as SCMs according to European Standards, yielding improved durability performance when compared to plain OPC or OPC with 20% limestone filler.
Effect of Volcanic Ash Used as Supplementary Cementitious Materials on Mortar Strength and Durability
https://orcid.org/http://orcid.org/0009-0004-5017-7290
https://orcid.org/http://orcid.org/0000-0002-1495-2155
https://orcid.org/http://orcid.org/0000-0003-2815-1444
https://orcid.org/http://orcid.org/0000-0002-8633-4305
The significant CO2 emission during cement production requires strategies for a more sustainable future. One approach is to replace the cement fraction with other materials partially. Volcanic ash can be used as supplementary cementitious materials (SCMs) due to the pozzolanic reactivity. In this study, the use of three volcanic ashes as SCMs were examined using samples from Laacher See (Germany), Etna (Italy), and Tungurahua (Ecuador) volcanoes, respectively. Mortar mixtures were prepared with 20 wt.-% of ordinary Portland cement (OPC) replaced by volcanic ash and compared to reference mixtures containing 100 wt.-% OPC or 20 wt.-% limestone powder as inert filler. After 90 days, Volcanic ash mortars reached comparable compressive and flexural strength levels to the OPC reference mortar, with no replacement. In addition, three different methods were used to determine the chloride penetration resistance of the hardened mortars. The chloride penetration resistance of all volcanic ash blended mortar samples was higher than the reference mortar after 90 days. The results show that all tested volcanic ashes can be used as SCMs according to European Standards, yielding improved durability performance when compared to plain OPC or OPC with 20% limestone filler.
Effect of Volcanic Ash Used as Supplementary Cementitious Materials on Mortar Strength and Durability
https://orcid.org/http://orcid.org/0009-0004-5017-7290
https://orcid.org/http://orcid.org/0000-0002-1495-2155
https://orcid.org/http://orcid.org/0000-0003-2815-1444
https://orcid.org/http://orcid.org/0000-0002-8633-4305
The significant CO2 emission during cement production requires strategies for a more sustainable future. One approach is to replace the cement fraction with other materials partially. Volcanic ash can be used as supplementary cementitious materials (SCMs) due to the pozzolanic reactivity. In this study, the use of three volcanic ashes as SCMs were examined using samples from Laacher See (Germany), Etna (Italy), and Tungurahua (Ecuador) volcanoes, respectively. Mortar mixtures were prepared with 20 wt.-% of ordinary Portland cement (OPC) replaced by volcanic ash and compared to reference mixtures containing 100 wt.-% OPC or 20 wt.-% limestone powder as inert filler. After 90 days, Volcanic ash mortars reached comparable compressive and flexural strength levels to the OPC reference mortar, with no replacement. In addition, three different methods were used to determine the chloride penetration resistance of the hardened mortars. The chloride penetration resistance of all volcanic ash blended mortar samples was higher than the reference mortar after 90 days. The results show that all tested volcanic ashes can be used as SCMs according to European Standards, yielding improved durability performance when compared to plain OPC or OPC with 20% limestone filler.
Effect of Volcanic Ash Used as Supplementary Cementitious Materials on Mortar Strength and Durability
Lecture Notes in Civil Engineering
Barros, Joaquim A. O. (Herausgeber:in) / Cunha, Vítor M. C. F. (Herausgeber:in) / Sousa, Hélder S. (Herausgeber:in) / Matos, José C. (Herausgeber:in) / Sena-Cruz, José M. (Herausgeber:in) / Appel, Andreas (Autor:in) / Tandon, Kai (Autor:in) / Küppers, Ulrich (Autor:in) / Stengel, Thorsten (Autor:in)
FIB International Conference on Concrete Sustainability ; 2024 ; Guimarães, Portugal
4th fib International Conference on Concrete Sustainability (ICCS2024) ; Kapitel: 41 ; 340-347
29.12.2024
8 pages
Aufsatz/Kapitel (Buch)
Elektronische Ressource
Englisch
| British Library Online Contents | 2019
| Springer Verlag | 2018
| British Library Online Contents | 2016