Granite is among the most plentiful rocks on earth. This intrusive igneous composite, formed by volcanic magma, makes up most of the continental crust. Anywhere you stand on dry land, granite is somewhere beneath your feet. It's also all around us in daily life. Granite has many uses in commercial construction and manufacturing, and has a long tradition in statues, headstones and carvings. The fabrication of granite produces large amounts of granite tailings, slurry and dust. These remainders are processed into powdered granite for several purposes.
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Victoria Stone is a building material used for paving and constructing piers, stairs and landings. It is made by mixing powdered granite with Portland cement. The slurry is poured into molds and allowed to set. The formed Victoria Stone is submersed in silicate of soda for up to two months. The lime in the cement reacts with the soda to produce a super-hardened material.
Powdered granite is rich in potassium and makes an excellent addition to the fertilizer regimen for gardens and flowers. Potassium content of commercially-available powdered granite can be as high as 11 percent, depending on its source. Fortified powdered granite is available, which contains added fertilizers such as greensand, fish meal and blood meal.
Granite countertops and slabs, granite statues, busts and memorials occasionally require superficial repairs. These are performed with commercially-available kits containing epoxy resins blended with powdered granite. Colorants are added to match the shade and age of the original granite, and texture can be varied to duplicate the surface.
Powdered granite adds strength and body to composite plastic used to mold sinks and basins. The colorant is contained in the resin and penetrates the entire structure. Therefore, chips and scratches are less conspicuous than with enamel sinks.