Characteristics of Treated Palm Oil Fuel Ash and its Effects on Properties of High Strength Concrete

Zeyad, Abdullah M.; Johari, Megat Azmi Megat; Bunnori, Norazura Muhamad; Ariffin, Kamar Shah; Altwair, Nurdeen M.

doi:10.4028/www.scientific.net/amr.626.152

Cited by 27 publications

(8 citation statements)

References 9 publications

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“…1. This process was similar to that reported previously by Zeyad et al (2013) and also by Chandara et al (2010) but without the second stage grinding. The physical properties and chemical compositions of OPC and UPOFA are provided in Table 1 and Table 2, respectively.…”

Section: Experimental Worksupporting

confidence: 91%

Improving the Engineering and Fluid Transport Properties of Ultra-High Strength Concrete Utilizing Ultrafine Palm Oil Fuel Ash

Mohammed

Johari

Zeyad

et al. 2014

ACT

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Ground treated ultrafine-POFA obtained from palm oil industry was heat-treated to remove excess carbon. The varied proportion (17%, 30% and 40%) of UPOFA was incorporated into the ultra-high strength concrete (UHSC) to study its effects on the UPOFA-UHSC (U x -UHSC) in comparison with OPC-UHSC (U 0 -UHSC) engineering and transport properties. The U x -UHSC has an increasing workability tendency with a retarded setting times as compared to U 0 -UHSC. Besides, U x -UHSC registered higher compressive strength than the U 0 -UHSC. The 90-d strength of 156 MPa was achieved in U 17 -UHSC which was 4.7%, 7.5% and 12.2% higher than the values obtained for U 30 -UHSC, U 40 -UHSC and U 0 -UHSC, respectively. The U 40 -UHSC exhibited the greatest improvement at 90 days in transport properties such as porosity, water absorption, initial surface absorption, rapid chloride permeability, gas permeability and water permeability while the highest strength was recorded with U 17 -UHSC. Thus, the pozzolanic UPOFA is capable of improving the engineering and transport properties of UHSC.

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Section: Experimental Worksupporting

confidence: 91%

Improving the Engineering and Fluid Transport Properties of Ultra-High Strength Concrete Utilizing Ultrafine Palm Oil Fuel Ash

Mohammed

Johari

Zeyad

et al. 2014

ACT

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“…al. [34], and Chandara et al [35] have also found similar results. At this stage, POFA had turned from black to brownish color [28]; this form of POFA is known as the treated mPOFA.…”

Section: Methodssupporting

confidence: 58%

Optimization of Micro and Nano Palm Oil Fuel Ash to Determine the Carbonation Resistance of the Concrete in Accelerated Condition

et al. 2019

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The carbonation rate of reinforced concrete is influenced by three parameters, namely temperature, relative humidity, and concentration of carbon dioxide (CO2) in the surroundings. As knowledge of the service lifespan of reinforced concrete is crucial in terms of corrosion, the carbonation process is important to study, and high-performance durable reinforced concretes can be produced to prolong the effects of corrosion. To examine carbonation resistance, accelerated carbonation testing was conducted in accordance with the standards of BS 1881-210:2013. In this study, 10–30% of micro palm oil fuel ash (mPOFA) and 0.5–1.5% of nano-POFA (nPOFA) were incorporated into concrete mixtures to determine the optimum amount for achieving the highest carbonation resistance after 28 days water curing and accelerated CO2 conditions up to 70 days of exposure. The effect of carbonation on concrete specimens with the inclusion of mPOFA and nPOFA was investigated. The carbonation depth was identified by phenolphthalein solution. The highest carbonation resistance of concrete was found after the inclusion of 10% mPOFA and 0.5% nPOFA, while the lowest carbonation resistance was found after the inclusion of 30% mPOFA and 1.5% nPOFA.

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“…The chemical properties of POFA depend on the burning process, the raw materials used and the burning temperature [20,21]. Treatment of POFA to improve the chemical compositions properties and physical properties by grinding and thermal treatment to increase the fluidity, fineness and effectiveness leads to enhanced strength properties [22]. It is found that utilizing POFA to treat soft clays increased the plastic limit, and overall, utilizing POFA in soft clay treatment reduces the plasticity and improves the consistency of the treated soil, which can be attributed to the agglomeration and flocculation that occurred in the particles of the stabilized soil, as found by [23,24].…”

Section: Introductionmentioning

confidence: 99%

Improving the Early Properties of Treated Soft Kaolin Clay with Palm Oil Fuel Ash and Gypsum

et al. 2021

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Soft soil problems and increased production of fuel waste have emerged due to world population growth. These two problems are prompting engineers to introduce new methods of using waste fuel to stabilize the soil. Previous research has shown clear sustained improvements in soil properties using palm oil fuel ash (POFA) when mixed with a calcium-based binder such as NaCl, lime or cement. The use of such a stabilizing agent can reduce the economic problems associated with reducing the cost of waste disposal and create a sustainable ecological system. It is an alternative method of replacing part of the soil to ensure a balance between economic growth and ecological privilege, leading to the achievement of green technology goals. However, this research is aimed at improving the properties of processed soft kaolin clay with a combination of POFA and gypsum. The physical and mechanical properties of all samples were tested. The results showed a decrease in the specific gravity with the addition of POFA and an increase with gypsum alone, as well as a decrease with a mixture of POFA and gypsum and a decrease in the soil plasticity index due to a better increase in the plasticity limit compared to the liquid limit. This is considered a sign of improved geotechnical properties and reduced linear shrinkage. It was also shown that the treated clay showed an increase in the optimal water content and a drop in the maximum dry density. Nevertheless, it can be concluded that the initial properties of the processed soft kaolin clay with the addition of POFA can be significantly improved.

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Characteristics of Treated Palm Oil Fuel Ash and its Effects on Properties of High Strength Concrete

Cited by 27 publications

References 9 publications

Improving the Engineering and Fluid Transport Properties of Ultra-High Strength Concrete Utilizing Ultrafine Palm Oil Fuel Ash

Improving the Engineering and Fluid Transport Properties of Ultra-High Strength Concrete Utilizing Ultrafine Palm Oil Fuel Ash

Optimization of Micro and Nano Palm Oil Fuel Ash to Determine the Carbonation Resistance of the Concrete in Accelerated Condition

Improving the Early Properties of Treated Soft Kaolin Clay with Palm Oil Fuel Ash and Gypsum

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