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Silicosis Prevention: Tool Box Session. Georgia Tech Safety and Health Consultation Program2 What is Silica? u Composes 15% of Earths Crust u Examples:

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Presentation on theme: "Silicosis Prevention: Tool Box Session. Georgia Tech Safety and Health Consultation Program2 What is Silica? u Composes 15% of Earths Crust u Examples:"— Presentation transcript:

1 Silicosis Prevention: Tool Box Session

2 Georgia Tech Safety and Health Consultation Program2 What is Silica? u Composes 15% of Earths Crust u Examples: –Sand, Granite, other Hard rocks u Quartz, most common u Crystalline Silica –has a diagnostic X-ray diffraction pattern

3 Georgia Tech Safety and Health Consultation Program3 Silica and Disease u 250 Worker deaths per year –(175 deaths/yr from trenching accidents) u Silicosis u Tuberculosis u Heart Disease u Lung Cancer? –Suspect Hum. Carcinogen –A2 (ACGIH)

4 Examples of Silica Exposures in Construction Georgia Tech Safety and Health Consultation Program4

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8 8Tuckpointing

9 Controls for Silica

10 Georgia Tech Safety and Health Consultation Program10 Types of Engineering Controls u 1. Wet Methods u 2. Ventilated Tools u 3. Abrasive Blasting Controls: –Alternate Media –Alternate Processes

11 Georgia Tech Safety and Health Consultation Program11 Wet Methods: Joint Cutting

12 Georgia Tech Safety and Health Consultation Program12 Wet Methods: Portable Saw

13 Georgia Tech Safety and Health Consultation Program13 Wet Methods: Pre-planning

14 Georgia Tech Safety and Health Consultation Program14 Wet Methods: Block Cutting

15 Georgia Tech Safety and Health Consultation Program15 Engineering Control 2. Ventilation u Portable tools with dust exhaust: –Surface Grinders –Disc Grinders (tuck pointing) –Crack chaser –Scarifier –Descaler –Power chipping tools u Retrofit Dust hoods

16 Georgia Tech Safety and Health Consultation Program16 Control by Ventilation: Slab Cutting

17 Georgia Tech Safety and Health Consultation Program17 Control by Ventilation: Hand tools

18 Georgia Tech Safety and Health Consultation Program18 Control by Ventilation: Tuckpointing

19 Georgia Tech Safety and Health Consultation Program19 Engineering Controls: 3. Substitute Abrasives u Coal slag (black beauty) u Steel grit & steel shot u Aluminum oxide u Sodium Bicarbonate –(baking soda) u Dust Suppressed Sand u Frozen CO2 u Ag. Prod. (walnut shells, corn cobs)

20 Silicosis is not a Curable Disease u Prevention is critical u Use Safe Work Practices Georgia Tech Safety and Health Consultation Program20


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