Morphological Characteristics of Hardened Cement Pastes Incorporating Nano-palm Oil Fuel Ash
Recently, nano-sized additives and supplementary cementing materials (SCM) have shown to improve the mechanical and durability of mortars and concretes. This study investigates the incorporation of nano-POFA (nPOFA) into cement paste so as to observe its effect towards the microstructure development...
| Main Authors: | , , |
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| Format: | Journal Article |
| Published: |
2015
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| Online Access: | http://hdl.handle.net/20.500.11937/73474 |
| _version_ | 1848763023074787328 |
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| author | Rajak, M. Majid, Z. Ismail, Mohamed |
| author_facet | Rajak, M. Majid, Z. Ismail, Mohamed |
| author_sort | Rajak, M. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | Recently, nano-sized additives and supplementary cementing materials (SCM) have shown to improve the mechanical and durability of mortars and concretes. This study investigates the incorporation of nano-POFA (nPOFA) into cement paste so as to observe its effect towards the microstructure development of cement. Additionally, the effect of micro-sized POFA (mPOFA) was also carried out for comparison. The mPOFA were subjected to milling for the generation of nPOFA. The prepared nPOFA exhibited a BET specific surface area of 145.35 m2/g with an average particle size ranging between 20 nm to 90 nm. Cement pastes were prepared with 10% - 50% replacement of nPOFA and 10% - 30% replacement of mPOFA. The morphological analysis of hardened cement paste (hcp) containing nPOFA (nPOFA-hcp), mPOFA (mPOFA-hcp) at the curing ages of 7, 28 and 90 days were conducted and compared with Ordinary Portland cement paste. At 7 days curing, the nPOFA particles acted as fillers and nucleation sites to accelerate cement hydration. The nPOFA particles reduced the appearance of lime crystals in the nPOFA-hcp at later curing ages due to the occurrence of pozzolanic reactions which formed secondary calcium-silicate-hydrates gel, resulting in a compact microstructure. The study concluded that the nPOFA particles created a dense and closely-packed microstructure of the hardened cement pastes due to the filling effect and pozzolanic reactions in the pastes. |
| first_indexed | 2025-11-14T10:56:52Z |
| format | Journal Article |
| id | curtin-20.500.11937-73474 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T10:56:52Z |
| publishDate | 2015 |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-734742019-06-06T03:21:25Z Morphological Characteristics of Hardened Cement Pastes Incorporating Nano-palm Oil Fuel Ash Rajak, M. Majid, Z. Ismail, Mohamed Recently, nano-sized additives and supplementary cementing materials (SCM) have shown to improve the mechanical and durability of mortars and concretes. This study investigates the incorporation of nano-POFA (nPOFA) into cement paste so as to observe its effect towards the microstructure development of cement. Additionally, the effect of micro-sized POFA (mPOFA) was also carried out for comparison. The mPOFA were subjected to milling for the generation of nPOFA. The prepared nPOFA exhibited a BET specific surface area of 145.35 m2/g with an average particle size ranging between 20 nm to 90 nm. Cement pastes were prepared with 10% - 50% replacement of nPOFA and 10% - 30% replacement of mPOFA. The morphological analysis of hardened cement paste (hcp) containing nPOFA (nPOFA-hcp), mPOFA (mPOFA-hcp) at the curing ages of 7, 28 and 90 days were conducted and compared with Ordinary Portland cement paste. At 7 days curing, the nPOFA particles acted as fillers and nucleation sites to accelerate cement hydration. The nPOFA particles reduced the appearance of lime crystals in the nPOFA-hcp at later curing ages due to the occurrence of pozzolanic reactions which formed secondary calcium-silicate-hydrates gel, resulting in a compact microstructure. The study concluded that the nPOFA particles created a dense and closely-packed microstructure of the hardened cement pastes due to the filling effect and pozzolanic reactions in the pastes. 2015 Journal Article http://hdl.handle.net/20.500.11937/73474 10.1016/j.promfg.2015.07.088 http://creativecommons.org/licenses/by-nc-nd/4.0/ fulltext |
| spellingShingle | Rajak, M. Majid, Z. Ismail, Mohamed Morphological Characteristics of Hardened Cement Pastes Incorporating Nano-palm Oil Fuel Ash |
| title | Morphological Characteristics of Hardened Cement Pastes Incorporating Nano-palm Oil Fuel Ash |
| title_full | Morphological Characteristics of Hardened Cement Pastes Incorporating Nano-palm Oil Fuel Ash |
| title_fullStr | Morphological Characteristics of Hardened Cement Pastes Incorporating Nano-palm Oil Fuel Ash |
| title_full_unstemmed | Morphological Characteristics of Hardened Cement Pastes Incorporating Nano-palm Oil Fuel Ash |
| title_short | Morphological Characteristics of Hardened Cement Pastes Incorporating Nano-palm Oil Fuel Ash |
| title_sort | morphological characteristics of hardened cement pastes incorporating nano-palm oil fuel ash |
| url | http://hdl.handle.net/20.500.11937/73474 |