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Quarry Face: Quarry faces from 35 feet to as high as 300 feet, where not tiered in benches, are drilled with well drills or rotary drills to the full height of the face. Such drilling for quarry faces SO to 100 feet high is common. Blast holes are of 6 to 9 or 10 inches in diameter for the largest operations and they are drilled from 2 to IS feet below the quarry Floor to minimize "toes." Hole spacings range from 6 feet apart to as much as 30 feet, depending on the height of the face, type of stone, and hole diameter. Generally, a single row of holes is fired. The drills are usually caterpillar-mounted for mobility.There may be slight natural color variations in quarry tiles, even in those from the same batch - a fact you can exploit when planning a color scheme. Small quarry tiles in a variety of shapes are also available, and these are suitable for creating mosaic patterns. If left untreated, quarry tiles have a matte appearance. If you want to produce a more shiny finish, then you need to treat them with linseed oil and turpentine.
Although equally hardwearing as ceramic tiles and requiring similar installation techniques, quarry tiles are unglazed and have more of a casual, country appearance - a look that is emphasized by their predominantly earthy coloration. Quarry tiles contain a high proportion of quartz and are not particularly porous, which makes them a suitable choice for kitchens. |
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