Synthesis of sustainable lightweight foamed concrete using palm oil fuel ash as a cement replacement material

Alnahhal, Ahmed Mahmoud and Alengaram, U. Johnson and Yusoff, Sumiani and Singh, Ramesh and Radwan, Mohammed K. H. and Deboucha, Walid (2021) Synthesis of sustainable lightweight foamed concrete using palm oil fuel ash as a cement replacement material. Journal Of Building Engineering, 35. ISSN 2352-7102, DOI

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The replacement of conventional ordinary Portland cement with industrial by-products to produce cellular lightweight foamed concrete can have economic and environmental benefits. The performance of using a palm oil industrial by-product, namely, palm oil fuel ash (POFA), as a cement replacement material was investigated with proportions of 10, 20, and 30% to achieve a targeted oven-dry density of 1300 kg/m(3). Tests on compressive & splitting tensile strengths, water absorption, porosity, and sorptivity were carried out and analysed. Further, the microstructural analyses through X-ray diffraction (XRD), scanning electron microscopy (SEM), and energy-dispersive X-ray (EDX) were conducted to correlate the test results. Non-destructive tests of ultrasonic pulse velocity and electrical resistivity tests were used for investigating the quality of concrete and corrosion resistivity. The results revealed that a replacement with 20% POFA produced slightly better performance compared to other mixes. A density reduction of about 43% with a replacement of 30% POFA was achieved in the development of non-structural foamed concrete. A reduction in compressive strength was noticed beyond 20% of POFA replacement and this could be attributed to the high amount of LOI, and porous nature of POFA; even though the UPV test results showed the foamed concrete as doubtful quantity the use of POFA as a sustainable material could be envisaged in such non-structural concrete. Furthermore, the SEM images shows the appearance of micro-cracks when 30% POFA was used. Moreover, the XRD results show a slight reduction in the intensity of the peaks of the crystalline phases when a higher quantity of POFA was used.

Item Type: Article
Funders: University of Malaya under the Impact Oriented Interdisciplinary Research Grant (IIRG) [IIRG016C-2019], Universiti Malaya
Uncontrolled Keywords: Lightweight foamed concrete; Palm oil fuel ash; Sustainability; Cement replacement material; Non-structural lightweight concrete
Subjects: T Technology > TA Engineering (General). Civil engineering (General)
T Technology > TJ Mechanical engineering and machinery
Divisions: Faculty of Engineering
Depositing User: Ms Zaharah Ramly
Date Deposited: 22 Jul 2022 07:11
Last Modified: 22 Jul 2022 07:11

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