Alkaline activation of high-calcium ash and iron ore tailings and their recycling potential in building materials
Alkali-activated materials are agglomerates obtained from the alkaline activation of aluminum- and silicone-rich precursors. The most popular precursors for this type of activation are low-calcium fly ashes, blast furnace slag, and metakaolin. However, both high-calcium ashes (HCAs) and iron ore tai...
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ANTAC - Associação Nacional de Tecnologia do Ambiente Construído
2019
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ojs-article-841972019-06-17T21:12:22Z Alkaline activation of high-calcium ash and iron ore tailings and their recycling potential in building materials Bezerra, Augusto Cesar da Silva França, Sâmara Magalhães, Luciano Fernandes de Carvalho, Maria Cristina Ramos de : Ativação alcalina, cinzas com alto teor de cálcio, rejeito de minério de ferro, blocos compactados, reciclagem. Alkali-activated materials are agglomerates obtained from the alkaline activation of aluminum- and silicone-rich precursors. The most popular precursors for this type of activation are low-calcium fly ashes, blast furnace slag, and metakaolin. However, both high-calcium ashes (HCAs) and iron ore tailings (IOTs) are interesting wastes that can be investigated as precursors because of their available volume and environmental impact during their final deposition. Therefore, by performing tests of compressive strength, FTIR spectrometry and scanning electron microscopy, we sought to identify the products formed during HCA and IOT activation without thermal treatment. Nine mortar formulations with different HCA and IOT proportions were developed using sodium hydroxide and sodium silicate as activators. Thus, using FTIR spectrometry, we observed the reaction between the industrial wastes. Additionally, the compressive strength result suggested that the material could be used as compressed blocks in masonry walls for the development of more environmentally friendly building materials, which would mitigate the impact of waste disposal and convert industrial solid waste into value-added products. ANTAC - Associação Nacional de Tecnologia do Ambiente Construído Minas Gerais State Research Foundation (FAPEMIG), the National Council for Scientific and Technological Development (CNPq), and the Brazilian Federal Agency for the Support and Evaluation of Graduate Education (CAPES) 2019-06-17 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion https://seer.ufrgs.br/ambienteconstruido/article/view/84197 Ambiente Construído; v. 19, n. 3 (2019); 99-112 Ambiente Construído; v. 19, n. 3 (2019); 99-112 Ambiente Construído; v. 19, n. 3 (2019); 99-112 1678-8621 1415-8876 eng https://seer.ufrgs.br/ambienteconstruido/article/view/84197/53047 Direitos autorais 2019 Ambiente Construído https://creativecommons.org/licenses/by/4.0 |
| institution |
Universidade Federal do Rio Grande do Sul |
| collection |
OJS |
| language |
eng |
| format |
Online |
| author |
Bezerra, Augusto Cesar da Silva França, Sâmara Magalhães, Luciano Fernandes de Carvalho, Maria Cristina Ramos de |
| spellingShingle |
Bezerra, Augusto Cesar da Silva França, Sâmara Magalhães, Luciano Fernandes de Carvalho, Maria Cristina Ramos de Alkaline activation of high-calcium ash and iron ore tailings and their recycling potential in building materials |
| author_facet |
Bezerra, Augusto Cesar da Silva França, Sâmara Magalhães, Luciano Fernandes de Carvalho, Maria Cristina Ramos de |
| author_sort |
Bezerra, Augusto Cesar da Silva |
| title |
Alkaline activation of high-calcium ash and iron ore tailings and their recycling potential in building materials |
| title_short |
Alkaline activation of high-calcium ash and iron ore tailings and their recycling potential in building materials |
| title_full |
Alkaline activation of high-calcium ash and iron ore tailings and their recycling potential in building materials |
| title_fullStr |
Alkaline activation of high-calcium ash and iron ore tailings and their recycling potential in building materials |
| title_full_unstemmed |
Alkaline activation of high-calcium ash and iron ore tailings and their recycling potential in building materials |
| title_sort |
alkaline activation of high-calcium ash and iron ore tailings and their recycling potential in building materials |
| description |
Alkali-activated materials are agglomerates obtained from the alkaline activation of aluminum- and silicone-rich precursors. The most popular precursors for this type of activation are low-calcium fly ashes, blast furnace slag, and metakaolin. However, both high-calcium ashes (HCAs) and iron ore tailings (IOTs) are interesting wastes that can be investigated as precursors because of their available volume and environmental impact during their final deposition. Therefore, by performing tests of compressive strength, FTIR spectrometry and scanning electron microscopy, we sought to identify the products formed during HCA and IOT activation without thermal treatment. Nine mortar formulations with different HCA and IOT proportions were developed using sodium hydroxide and sodium silicate as activators. Thus, using FTIR spectrometry, we observed the reaction between the industrial wastes. Additionally, the compressive strength result suggested that the material could be used as compressed blocks in masonry walls for the development of more environmentally friendly building materials, which would mitigate the impact of waste disposal and convert industrial solid waste into value-added products. |
| publisher |
ANTAC - Associação Nacional de Tecnologia do Ambiente Construído |
| publishDate |
2019 |
| url |
https://seer.ufrgs.br/ambienteconstruido/article/view/84197 |
| work_keys_str_mv |
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| _version_ |
1709370647190175744 |