Research article

Assessment of the strength weight ratio of concrete produced with Sawdust ash from Wood of Gmelina tree as a partial replacement for Cement

^*1Chukwudi EU Prince, ²Chiemela Chijioke and ³Jennifer George

^1,2Department of Civil Engineering, Federal Polytechnic Nekede, Owerri, Nigeria

³Department of Architecture, Taraba State Polytechnic, Suntai Jalingo, Nigeria

 *Corresponding Author: cchijioke@fpno.edu.ng

       Received 03 October, 2024                 Accepted 20 November 2024                  Published 24 November, 2024 

Abstract

This study investigates the potential of Gmelina sawdust ash (GSA) as a sustainable and efficient partial replacement for traditional cement in concrete. With the increasing need for environmentally friendly construction materials, GSA emerges as a promising alternative due to its pozzolanic properties and potential to reduce waste. Concrete samples were prepared using Ordinary Portland Cement (OPC) partially replaced with varying percentages of GSA (0%, 5%, 10%, 15%, 20%, and 25%) in a mix ratio of 1:2:4. Experimental analyses included sieve analysis, slump tests, compressive strength tests, and bulk density assessments were carried out. The chemical composition of GSA was characterized, revealing high silica content conducive for the pozzolanic reaction. Results indicated a progressive decrease in slump and bulk density as GSA content increased, signifying reduced workability and mass. Optimal compressive strength and strength-weight ratio were observed at a specific replacement percentage, suggesting that GSA can enhance concrete performance under controlled conditions. This research provides valuable insights into the application of GSA as a cement alternative, contributing to both waste management solutions and the development of sustainable building practices.

Keyword: Gmelina sawdust ash (GSA), Water, Compressive Strength, Density, Weight