Michaels, Temitope Oluwadamilare Augustine and Covenant University, Theses Masters (2024) MODELLING AND STRENGTH ASSESSMENT OF CONCRETE MADE WITH FINE SAND MINED IN LAGOS STATE. Masters thesis, Covenant University.
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Abstract
The utilization of locally sourced materials in concrete production is pivotal for sustainable construction practices, particularly in regions with abundant natural resources. This research proposal aims to assess the strength properties of concrete produced using fine sand mined in different locations in Lagos State. The physical and chemical properties, as well as the grading characteristics, of sand samples from Bariga, Badagry, Epe, and Ikorodu were determined using standard procedures. Additionally, concrete samples were produced using aggregates from these selected locations. The concrete cubes were cured in water for periods ranging from 7 to 56 days. The constituents were modeled using Fuzzy logic, and the experimental values were compared with analytical models (linear, and polynomial), and Fuzzy logic model (Artificial Intelligence). The modeling predicted the compressive strength with a very high degree of accuracy. The results indicated that all the sand samples contained high levels of silica. Furthermore, the fine aggregates had pH values between 7.01 and 7.41, chloride contents ranging from 0.002% to 0.028%, and sulphate contents between 0.0025% and 0.0039%. The compressive strength of concrete made with all the fine sands exceeded 25 N/mm² at 28 days of curing. It was observed that fine aggregates from Bariga gained strength more slowly in the early days compared to those from the other locations. These findings provide valuable insights into the different types of locally available sand materials, thereby promoting sustainable and cost-effective construction practices in Lagos State and similar regions. Ultimately, this research contributes to the development of guidelines for the effective use of fine sand in concrete production, ensuring both structural durability and environmental sustainability. Some improvement would be required during the use of some fine aggregate with impurities to cast concrete. Given the significant role of sand quality in determining the structural integrity of concrete, this study seeks to provide a comprehensive evaluation of the mechanical performance of concrete incorporating these mined fine sands.
| Item Type: | Thesis (Masters) |
|---|---|
| Uncontrolled Keywords: | Sand, Fuzzic Logic, Modelling, Strength, Lagos State, Regression Analysis |
| Subjects: | T Technology > TJ Mechanical engineering and machinery T Technology > TP Chemical technology |
| Divisions: | Faculty of Engineering, Science and Mathematics > School of Engineering Sciences |
| Depositing User: | nwokealisi |
| Date Deposited: | 06 Jan 2025 15:21 |
| Last Modified: | 06 Jan 2025 15:21 |
| URI: | http://eprints.covenantuniversity.edu.ng/id/eprint/18666 |
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