What is it about?
In an attempt to reuse and convert agro wastes into useful materials for the construction industry, this research considered the application of corn stalk ash (CSA) as partial replacement for ordinary Portland cement (OPC) in the production of interlocking paving stones. The study investigated the oxide composition of CSA to ascertain its suitability as a pozzolanic material. Some properties of paving stones with CSA as a replacement for OPC were examined. The results showed that CSA is a good pozzolana having satisfied the required standards. The compressive strength of the specimens with replacement levels ranging from 5 to 25% cured for periods of 3–56 days was lower at early curing time but improved significantly at later age.The test results revealed that CSA paving stones can attain higher strength than the conventional ones at longer curing periods, due to its pozzolanic reactions.
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Why is it important?
The utilization of corn stalk ash in concrete production is an environmentally friendly method of disposal of large amounts of materials that would have constituted pollution to land, water and air
Perspectives
The cost of conventional building materials such as cement continue to increase and this thereby necessitates the search for alternative local materials as total or partial replacement for cement. The use of this material reduces the environmental pollution and also improves the properties of concrete.
Dr Solomon Idowu Adedokun
University of Lagos
Read the Original
This page is a summary of: Application of Corn Stalk Ash as Partial Replacement for Cement in the Production of Interlocking Paving Stones, International Journal of Engineering Research in Africa, May 2017, Trans Tech Publications,
DOI: 10.4028/www.scientific.net/jera.30.85.
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