Fracture and tensile characteristics of engineered cementitious composites containing POFA
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- Megat Azmi Megat Johari
- Associate Professor, School of Civil Engineering, Universiti Sains Malaysia, Nibong Tebal, Malaysia
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- Nurdeen M. Altwair
- PhD Student, School of Civil Engineering, Universiti Sains Malaysia, Nibong Tebal, Malaysia; Faculty member, Civil Engineering Department, Al-Merghab University, Al-Khums, Libya
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- Syed Fuad Saiyid Hashim
- Associate Professor, School of Materials and Mineral Resources Engineering, Universiti Sains Malaysia, Nibong Tebal, Malaysia
説明
<jats:p> The fracture and tensile characteristics of engineered cementitious composites (ECCs) containing palm oil fuel ash (POFA) have been investigated. POFA obtained from a palm oil mill was treated first by grinding and then by heat treatment. The treated POFA was then utilised to produce ECCs in combination with polyvinyl alcohol fibres with proportions of POFA ranging from 0 to 1·2 from the mass of cement. The performance of the POFA–ECCs was evaluated by means of matrix fracture and direct tensile tests. The experimental results indicate that the ECC mix containing POFA exhibits lower fracture toughness and fracture energy values than a mix without POFA. Nonetheless, the addition of POFA contributes to a greater pseudo-strain hardening index, in particular at higher POFA content. This reveals that the use of POFA should be helpful for achieving strain hardening behaviour. In addition, an increase in POFA content increases the tensile strain capacity of the ECC. Furthermore, the crack width of the ECC decreases significantly with an increase of POFA content. Thus, the overall findings exhibit that the POFA used brings about promising positive effects on the fracture and tensile characteristics of ECCs. </jats:p>
収録刊行物
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- Advances in Cement Research
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Advances in Cement Research 25 (4), 189-199, 2013-08
Thomas Telford Ltd.
