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Contribution to Comparative Study of Physical-Chemical Characteristics of Diack Basalt and Bandia Limestone for Use in Railway Engineering

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Document pages: 10 pages

Abstract: This paper presents a comparative study of Physical-Chemical characteristics of Limestone and Basalt (from Senegalese quarries). First, chemical tests show that Basalt is richer in silica 51.59 versus 2.84 for Limestone. Basalt is made up of silica minerals and essentially carbonated minerals with a CaO percentage of 50.05 . Chemical results also show that Basalt is richer in iron 12.71 versus 0.44 for Limestone. Finally, they revealed a fire loss of 40.91 for Limestone and 2.44 for Basalt. Second, physical analysis results show that Diack Basalt has the best characteristics with a flattening coefficient of 5 between 5 and 20 ; the percentage of pollutants is 0.36 less than 1 ; the Los Angeles coefficient is 12.21 below 15, while Bandia Limestone gives a flattening coefficient of 3 ; the Los Angeles coefficient of 40.17 and the percentage of pollutant (2.4 ) well above 2 . It is noted that the percentage of Limestone pollutant is too high. These important results show the net advantage of Basalt compared to Limestone in terms of physical-chemical characteristics.

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