Compressive strengths of concrete by partially replacing sand with iron-ore waste
Department of Civil Engineering, Faculty of Engineering, Baze University Abuja, Nigeria.
Research Article
GSC Advanced Engineering and Technology, 2022, 03(02), 036–051.
Article DOI: 10.30574/gscaet.2022.3.2.0032
Publication history:
Received on 27 March 2022; revised on 18 May 2022; accepted on 21 May 2022\
Abstract:
Sand is extracted at a rate more than its restoration. Nevertheless, the availability of sand in the growing demand of the construction industry remains a challenge due to cost and quality problems. This study investigates the compressive strength of concrete by partially replacing sand with iron-ore waste. Experimental investigations were conducted to study the compressive strength, physical, mechanical and fresh property of concrete containing iron-ore waste. During the experiment, concrete cubes were prepared with 10-100% composition of iron ore waste to evaluate their compressive strength. Results from the experimentation revealed that, concrete cubes prepared by partially replacing sand with iron ore waste often yield a better compressive strength than a conventional concrete. More so, the densities of concrete cubes were observed to remain consistent but increased slightly, notably at 10% and 20% of waste replacement. Meanwhile, at 30% waste replacement, there was reduction in compressive strength at 28days curing age and this reduction continued as percentage iron ore increased towards 100%. Also, increase in compressive strength of concrete cubes was observed at 10-20% sand replacement with iron ore. It was therefore established that concrete produced under 10% and 20% replacement, can be utilized for all construction purposes requiring concrete.
Keywords:
Compressive strength; Iron ore; Concrete cubes; Density; Sand replacement; Construction
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