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| Qualitative Estimation of Organic impurities on a Selected Cement Sand Aggregate. |
Olabimtan Olabode H, Abubakar Zaid, Suleman Stephen.M, Aronimo Samuel B., Muhammed Aliyu
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Abstract:
The unethical approach especially with Nigerian construction companies with the manufacturing of concrete bricks and structures with any available sand regardless of its underlying negative impacts. Sand collected from the river bank for construction in Zaria was examined for determination of its level of organic impurities in relation to its standard particle size as fine and coarse aggregates for concrete production. The retained mass of the particles with the respective sieve sizes were interacted (y= - 25.21x2 + 83.27x + 163.1; R2=0.503 & y= -0.202x2 + 15.69x + 22.54; R2=0.821) alongside the retained cumulative mass against the standard sieve sizes as a linear function of y= - 214.3x +874.5) for fine aggregate with R2=0.817 and polynomial function of y= 0.167x2 - 26.20x + 1025 for coarse aggregates with R2=0.998. The grading characteristics of the sand samples were also estimated using standard procedures. The results showed that the sand sample particle size distribution indicated that the whole sand sample is technically coarse particles with fineness modulus of 3.245 and 3.501 with the fine and coarse initial classification. Conclusively, protocol (s) with the particle size analysis of cement aggregates and their level of organic impurities should be established for specific construction application.
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