Physical-mechanical behavior of alkali-activated materials produced by the one-part method based on fly ash and rice husk ash
Abstract The study on the physical-mechanical properties of alkali-activated materials (AAM) produced by the ‘one-part’ method was carried out. For this, residues such as fly ash and rice husk ash (RHA) were used. The alkaline activator (NaOH) was calcined together with RHA for 2 h at 750 °C. Dry mi...
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| Format: | Article |
| Language: | English |
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Associação Brasileira de Cerâmica
2022-07-01
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| Series: | Cerâmica |
| Subjects: | |
| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0366-69132022000200160&lng=en&tlng=en |
| _version_ | 1811323781283577856 |
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| author | L. F. T. Domingos A. G. S. Azevedo K. Strecker |
| author_facet | L. F. T. Domingos A. G. S. Azevedo K. Strecker |
| author_sort | L. F. T. Domingos |
| collection | DOAJ |
| description | Abstract The study on the physical-mechanical properties of alkali-activated materials (AAM) produced by the ‘one-part’ method was carried out. For this, residues such as fly ash and rice husk ash (RHA) were used. The alkaline activator (NaOH) was calcined together with RHA for 2 h at 750 °C. Dry mixes were prepared by replacing fly ash with 10%, 20%, and 30% by weight of the calcined material. The samples produced were characterized after 7 and 28 days of curing. The results showed that the investigated variables (calcined material content and curing time at room temperature) were responsible for important variations: compressive strength from 2.40 to 24.92 MPa, modulus of elasticity from 0.90 to 12.32 GPa, water absorption from 2.92% to 13.64%, apparent porosity from 4.82% to 20.02%, and density from 1.48 to 1.71 g/cm3. It was concluded that these variations were due to the high concentration of Na2O and SiO2 in the dry mixtures. |
| first_indexed | 2024-04-13T14:01:08Z |
| format | Article |
| id | doaj.art-da7c4a6bfeb240069b1e741bf3f72b4e |
| institution | Directory Open Access Journal |
| issn | 1678-4553 |
| language | English |
| last_indexed | 2024-04-13T14:01:08Z |
| publishDate | 2022-07-01 |
| publisher | Associação Brasileira de Cerâmica |
| record_format | Article |
| series | Cerâmica |
| spelling | doaj.art-da7c4a6bfeb240069b1e741bf3f72b4e2022-12-22T02:44:02ZengAssociação Brasileira de CerâmicaCerâmica1678-45532022-07-016838616017010.1590/0366-69132022683863213Physical-mechanical behavior of alkali-activated materials produced by the one-part method based on fly ash and rice husk ashL. F. T. Domingoshttps://orcid.org/0000-0003-2605-1220A. G. S. AzevedoK. StreckerAbstract The study on the physical-mechanical properties of alkali-activated materials (AAM) produced by the ‘one-part’ method was carried out. For this, residues such as fly ash and rice husk ash (RHA) were used. The alkaline activator (NaOH) was calcined together with RHA for 2 h at 750 °C. Dry mixes were prepared by replacing fly ash with 10%, 20%, and 30% by weight of the calcined material. The samples produced were characterized after 7 and 28 days of curing. The results showed that the investigated variables (calcined material content and curing time at room temperature) were responsible for important variations: compressive strength from 2.40 to 24.92 MPa, modulus of elasticity from 0.90 to 12.32 GPa, water absorption from 2.92% to 13.64%, apparent porosity from 4.82% to 20.02%, and density from 1.48 to 1.71 g/cm3. It was concluded that these variations were due to the high concentration of Na2O and SiO2 in the dry mixtures.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0366-69132022000200160&lng=en&tlng=enalkali-activated materialsfly ashrice rusk ashone-part method |
| spellingShingle | L. F. T. Domingos A. G. S. Azevedo K. Strecker Physical-mechanical behavior of alkali-activated materials produced by the one-part method based on fly ash and rice husk ash Cerâmica alkali-activated materials fly ash rice rusk ash one-part method |
| title | Physical-mechanical behavior of alkali-activated materials produced by the one-part method based on fly ash and rice husk ash |
| title_full | Physical-mechanical behavior of alkali-activated materials produced by the one-part method based on fly ash and rice husk ash |
| title_fullStr | Physical-mechanical behavior of alkali-activated materials produced by the one-part method based on fly ash and rice husk ash |
| title_full_unstemmed | Physical-mechanical behavior of alkali-activated materials produced by the one-part method based on fly ash and rice husk ash |
| title_short | Physical-mechanical behavior of alkali-activated materials produced by the one-part method based on fly ash and rice husk ash |
| title_sort | physical mechanical behavior of alkali activated materials produced by the one part method based on fly ash and rice husk ash |
| topic | alkali-activated materials fly ash rice rusk ash one-part method |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0366-69132022000200160&lng=en&tlng=en |
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