Influence of sun flower stalk ash (SFSA) on the behavior of Portland cement pastes
In the current study, several measurements are carried out to characterize the influence of sun flower stalk ash (SFSA) on the physical, chemical and mechanical properties of Portland cement pastes as heat of hydration, chemically combined water and free lime contents, bulk density, apparent porosit...
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| Format: | Article |
| Language: | English |
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Elsevier
2020-12-01
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| Series: | Results in Engineering |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2590123020300773 |
| _version_ | 1818461665725775872 |
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| author | H.H.M. Darweesh |
| author_facet | H.H.M. Darweesh |
| author_sort | H.H.M. Darweesh |
| collection | DOAJ |
| description | In the current study, several measurements are carried out to characterize the influence of sun flower stalk ash (SFSA) on the physical, chemical and mechanical properties of Portland cement pastes as heat of hydration, chemically combined water and free lime contents, bulk density, apparent porosity and compressive strength. It is concluded that the gradual incorporation of SFSA with the cement, increases the surface area or fineness of the whole cement batches. The SFSA can improve and enhance all specific properties of the OPC pastes, particularly the compressive strength. The free lime content often decreased with the SFSA content, i.e. as the SFSA addition increased, the free lime content decreased. The cement pastes containing 24 wt % SFSA was the optimum batch because it achieved the best results, while that containing 30 wt % SFSA exhibited the lowest values at all hydration times. So, the higher amounts of SFSA must be avoided. The XRD patterns, DTA thermograms and FT-IR spectra showed that the intensity of free lime peaks is obviously decreased with SFSA content. Also, the amount of CSH improved and increased with the increase of SFSA content. |
| first_indexed | 2024-12-14T23:49:45Z |
| format | Article |
| id | doaj.art-ce34bf2cf10448528d7f81220df97d2f |
| institution | Directory Open Access Journal |
| issn | 2590-1230 |
| language | English |
| last_indexed | 2024-12-14T23:49:45Z |
| publishDate | 2020-12-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Results in Engineering |
| spelling | doaj.art-ce34bf2cf10448528d7f81220df97d2f2022-12-21T22:43:16ZengElsevierResults in Engineering2590-12302020-12-018100171Influence of sun flower stalk ash (SFSA) on the behavior of Portland cement pastesH.H.M. Darweesh0Refractories, Ceramics and Building Materials Department, National Research Centre, Cairo, EgyptIn the current study, several measurements are carried out to characterize the influence of sun flower stalk ash (SFSA) on the physical, chemical and mechanical properties of Portland cement pastes as heat of hydration, chemically combined water and free lime contents, bulk density, apparent porosity and compressive strength. It is concluded that the gradual incorporation of SFSA with the cement, increases the surface area or fineness of the whole cement batches. The SFSA can improve and enhance all specific properties of the OPC pastes, particularly the compressive strength. The free lime content often decreased with the SFSA content, i.e. as the SFSA addition increased, the free lime content decreased. The cement pastes containing 24 wt % SFSA was the optimum batch because it achieved the best results, while that containing 30 wt % SFSA exhibited the lowest values at all hydration times. So, the higher amounts of SFSA must be avoided. The XRD patterns, DTA thermograms and FT-IR spectra showed that the intensity of free lime peaks is obviously decreased with SFSA content. Also, the amount of CSH improved and increased with the increase of SFSA content.http://www.sciencedirect.com/science/article/pii/S2590123020300773CementSun flower stalk ashSettingDensityPorosityStrength |
| spellingShingle | H.H.M. Darweesh Influence of sun flower stalk ash (SFSA) on the behavior of Portland cement pastes Results in Engineering Cement Sun flower stalk ash Setting Density Porosity Strength |
| title | Influence of sun flower stalk ash (SFSA) on the behavior of Portland cement pastes |
| title_full | Influence of sun flower stalk ash (SFSA) on the behavior of Portland cement pastes |
| title_fullStr | Influence of sun flower stalk ash (SFSA) on the behavior of Portland cement pastes |
| title_full_unstemmed | Influence of sun flower stalk ash (SFSA) on the behavior of Portland cement pastes |
| title_short | Influence of sun flower stalk ash (SFSA) on the behavior of Portland cement pastes |
| title_sort | influence of sun flower stalk ash sfsa on the behavior of portland cement pastes |
| topic | Cement Sun flower stalk ash Setting Density Porosity Strength |
| url | http://www.sciencedirect.com/science/article/pii/S2590123020300773 |
| work_keys_str_mv | AT hhmdarweesh influenceofsunflowerstalkashsfsaonthebehaviorofportlandcementpastes |