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Influence of Sawdust Particle Sizes on the Physico-Mechanical Properties of Unfired Clay Blocks

1
School of Civil Engineering & Built Environment, Liverpool John Moores University, Byrom Street, Liverpool L3 3AF, UK
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Department of Architectural Engineering, University of Sharjah, Sharjah 341246, United Arab Emirates
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Author to whom correspondence should be addressed.
Academic Editor: Tiago Ribeiro
Designs 2021, 5(3), 57; https://doi.org/10.3390/designs5030057
Received: 14 August 2021 / Revised: 7 September 2021 / Accepted: 13 September 2021 / Published: 14 September 2021
Sawdust, which is a waste/by-product of the wood/timber industry, can be utilised as a valuable raw material in building material production due to its abundance and low cost. However, the application of sawdust in the manufacture of unfired clay blocks has received little investigation. Furthermore, the impact of different sawdust particle sizes on the properties of unfired clay blocks has not been studied. Therefore, this study screened sawdust at three different particle sizes: SP-a (212 μm < x < 300 μm), SP-b (425 μm < x < 600 μm) and SP-c (1.18 mm < x < 2.00 mm), to examine their effects on the physical and mechanical properties of unfired clay blocks. The density, linear shrinkage, capillary water absorption and flexural and compressive strengths were among the tests performed. Different sawdust percentages, i.e., 2.5%, 5%, 7.5% and 10% of the total weight of the clay, were considered. The tests results show that when sawdust was added to the mixture, the density of the samples reduced for all particle sizes. However, the linear shrinkage increased in SP-a samples but decreased in the other two particle size samples as the sawdust percentage increased from 2.5% to 10%. On the other hand, the capillary water absorption coefficient increased while the strength decreased with increasing sawdust content for all three groups. The highest compressive strength (CS) and flexural strength (FS) were achieved at 2.5% of sawdust content. Furthermore, it was observed that SP-b (CS—4.74 MPa, FS—2.00 MPa) samples showed the highest strength followed by SP-a (CS—4.09 MPa, FS—1.69 MPa) and SP-c (CS—3.90 MPa, FS—1.63 MPa) samples. Consequently, good-quality unfired clay blocks can be manufactured using sawdust up to 2.5% with particle sizes ranging between 600 and 425 μm. View Full-Text
Keywords: wood by-products; sawdust; particle size; clay blocks; unfired wood by-products; sawdust; particle size; clay blocks; unfired
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MDPI and ACS Style

Jannat, N.; Latif Al-Mufti, R.; Hussien, A.; Abdullah, B.; Cotgrave, A. Influence of Sawdust Particle Sizes on the Physico-Mechanical Properties of Unfired Clay Blocks. Designs 2021, 5, 57. https://doi.org/10.3390/designs5030057

AMA Style

Jannat N, Latif Al-Mufti R, Hussien A, Abdullah B, Cotgrave A. Influence of Sawdust Particle Sizes on the Physico-Mechanical Properties of Unfired Clay Blocks. Designs. 2021; 5(3):57. https://doi.org/10.3390/designs5030057

Chicago/Turabian Style

Jannat, Nusrat, Rafal Latif Al-Mufti, Aseel Hussien, Badr Abdullah, and Alison Cotgrave. 2021. "Influence of Sawdust Particle Sizes on the Physico-Mechanical Properties of Unfired Clay Blocks" Designs 5, no. 3: 57. https://doi.org/10.3390/designs5030057

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