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Silica: Controlling Silica Dust in Construction - Crushing Machines Fact Sheet (OSHA FS-3935 - 2017) (English: PDF): Silica: Controlling Silica Dust in Construction - Dowel Drilling Rigs for Concrete Fact Sheet (OSHA FS-3930 - 2017) (English: PDF): Silica: Controlling Silica Dust in Construction - Drivable Saws Fact Sheet (OSHA FS-3928 - 2017) (English: PDF)
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Jun 04, 2019 · Fused Silica: Fused silica is commonly made by melting crystalline silica at high temperatures of 1900–2500 °C, and then by crushing and pulverizing after re-solidification. Fused silica is amorphous powder, which is depicted in Figure 1 d. The internal stress is released and the results in low density and in a smaller coefficient of thermal ...
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Jul 26, 2011 · In all cases where concrete is being smashed or size-reduced, demolition workers and crushing plant operators are breaking down materials with crystalline silica dust as a percentage of the particulate matter in part of the dust created. When a worker’s lungs are over-exposed to silica-containing dust, the potential damage is substantial.
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May 19, 2016 · Silica actually comes in many forms — some safe, some not. Crystalline silica, a form that includes quartz, can be toxic if inhaled. Crystalline silica is found in rock, brick, and concrete. Grinding, sawing, crushing, or drilling these materials produces a fine powder that causes serious respiratory concerns.
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Crystalline silica and silicosis | Safe Work Australia
Crystalline silica is found in sand, stone, concrete and mortar. When workers cut, crush, drill, polish, stone or grind products containing silica, dust particles are generated that are small enough to lodge deep in the lungs and cause illness or disease including silicosis.
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Respirable crystalline silica – very small particles at least 100 times smaller than ordinary sand you might find on beaches and playgrounds – is created when cutting, sawing, grinding, drilling, and crushing stone, rock, concrete, brick, block, and mortar.
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