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Essay example - Portland CEM1 Cement/Silica Fume
Engineering and Construction
Pages 10 (2510 words)
Cement is used in all building construction. It is a great advantage to lessen its cost. Silica fume are air-pollutants as a by-product of the production of ferrosilicon alloys. Due to its environmental impact, its proper disposal has been a concern. …
Extract of sample
They are available with different silicon dioxide concentrations depending on the purity of the silicon metal being produced. It would be convenient if silica fumes are integrated to the cement mixtures. Studies have shown that silica fumes strengthen concrete structures. This experiment aimed to determine establish the effect of replacing percentages of cement with silica fume.
The main objective of this experiment is to determine the effect of the utilization of silica fume in the production of Portland cement.
This experiment specifically aims to:
1. produce three concrete mixes; Mix 1, Mix 2A and Mix 2B containing 0, 5, and 10% silica fume respectively;
2. and test the fabricated mixes in terms of slump test, maximum load, flexural strength, stress test, and compressive strength under European standards.
Review of Related Literature
Silica fumes are by-product of the manufacture of silicon metals or ferrosilicon alloys (Dunster 2009). It is called various names such as silica dust and microsilica (Kuennen 1996). This is because it consists of very fine spherical glassy particles. Its silicon dioxide content ranges from 61 to 98 percent depending on the silicon purity of the metal from which production the silica fumes are collected (ACI Committee 2000). Silica fume was first characterized in the 1950s. It was discovered to be harmful to the environment in the 1970s (Dunster 2009). ...
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