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Silicosis Prevention: Tool Box Session

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Silicosis Prevention: Tool Box Session Georgia Tech Safety and Health Consultation Program * What is Silica? Composes 15% of Earth s Crust Examples: Sand, Granite ... – PowerPoint PPT presentation

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Title: Silicosis Prevention: Tool Box Session


1
Silicosis Prevention Tool Box Session
2
What is Silica?
  • Composes 15 of Earths Crust
  • Examples
  • Sand, Granite, other Hard rocks
  • Quartz, most common
  • Crystalline Silica
  • has a diagnostic X-ray diffraction pattern

3
Silica and Disease
  • 250 Worker deaths per year
  • (175 deaths/yr from trenching accidents)
  • Silicosis
  • Tuberculosis
  • Heart Disease
  • Lung Cancer?
  • Suspect Hum. Carcinogen A2 (ACGIH)

4
Examples of Silica Exposures in Construction
5
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8
Tuckpointing
9
Controls for Silica
10
Types of Engineering Controls
  • 1. Wet Methods
  • 2. Ventilated Tools
  • 3. Abrasive Blasting Controls
  • Alternate Media
  • Alternate Processes

11
Wet Methods Joint Cutting
12
Wet Methods Portable Saw
13
Wet Methods Pre-planning
14
Wet Methods Block Cutting
15
Engineering Control2. Ventilation
  • Portable tools with dust exhaust
  • Surface Grinders
  • Disc Grinders (tuck pointing)
  • Crack chaser
  • Scarifier
  • Descaler
  • Power chipping tools
  • Retrofit Dust hoods

16
Control by Ventilation Slab Cutting
17
Control by Ventilation Hand tools
18
Control by Ventilation Tuckpointing
19
Engineering Controls 3. Substitute Abrasives
  • Coal slag (black beauty)
  • Steel grit steel shot
  • Aluminum oxide
  • Sodium Bicarbonate
  • (baking soda)
  • Dust Suppressed Sand
  • Frozen CO2
  • Ag. Prod. (walnut shells, corn cobs)

20
Silicosis is not a Curable Disease
  • Prevention is critical
  • Use Safe Work Practices
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