TEXT VERSION OF SLIDE:
Type: Picture Slide
Content: Includes photo of Portland cement operations.
Speaker Notes: The manufacture of Portland cement and bricks requires that the
raw material used, including silica, be reduced in size. The raw materials are
crushed into small stones, then ground into a fine powder. The result is that a
great amount of silica dust is created and becomes airborne. Exposure to the
dust continues during further handling and processing of the material.
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Printing Instructions | Text Version