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Composite brick production from sawdust of Parkia biglobosa (Jacq.) G. Don and Vitellaria paradoxa C. F. Gaertn as Partial Replacement for sand

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Author Affiliations

  • 1Department of Forest Production and Products, Federal University of Agriculture Makurdi, Nigeria
  • 2Department of Forest Production and Products, Federal University of Agriculture Makurdi, Nigeria
  • 3Department of Forest Production and Products, Federal University of Agriculture Makurdi, Nigeria

Res. J. Recent Sci., Volume 10, Issue (1), Pages 21-27, January,2 (2021)

Abstract

This study was undertaken to investigate sawdust as a fractional substitute for sand to produce bricks with an aim to minimizing production cost and productive use of sawdust waste as profitable resource. Sawdust of V. paradoxa and P. biglobosa was obtained from Timber Shed within Makurdi metropolis. The collected sawdust was treated by boiling it in water to remove lignochemical substances and thereafter, it was sun dried. Recommended ratio of 1:6 of cement to sand was endorsed in this study. Varied percentages of 0, 2, 4, and 6 of sawdust were employed to substitute for sand while quantity of cement for all level was held steady during the mixture of mortar. Tests were carried on the percentage of water absorption (PWA), bulk density (BD), and compressive strength (CS) on bricks made after 28 days of curing. Results revealed that bricks from 4% sawdust substitution for sand had the maximum percentage water absorption of 12.80 and 11.06% for followed by 2% (9.43% and 10.14) and 6% (8.66 and 6.47%) for P. biglobosa and V. paradoxa respectively while 0% sawdust substitution level had 8.21%. Mean compressive strength of 0% sawdust substitution (control) was highest (4.94 N/mm) followed by 2% (3.20 and 3.26 N/mm3), 4% (3.17 and 3.40 N/mm3) and 6% sawdust substitution level (3.35 and 3.21 N/mm3) for P. biglobosa and V. paradoxa sawdust, respectively. Bulk densities of made bricks were between 3600.56 and 1303.33 kg/m3, highest in 0% and least in 6% V. paradoxa sawdust replacement level. However, bulk densities were higher in V. Paradoxa (1345.78-1318.94) kg/m3 than in P. biglobosa (1328.60 - 1303.33) kg/m3. It was concluded that 2% sawdust replacement had the maximum compressive strength and bulk density with the least percentage water absorption. Hence, it was recommended for utilization for construction of non-load bearing walls.

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