Author: Kristie

SafetyNews

August 24, 2011

The Risks of Dry Cutting and Grinding

That cloud of dust you see when cutting concrete or brick is not just harmless dust! It contains crystalline silica, which can cause silicosis if inhaled. Silicosis has taken a serious toll in the United States, affecting workers in many settings. Thousands of people are exposed to crystalline silica dust at work every day. Not only does silicosis cause permanent lung damage, it can lead to heart failure and increase the risk of other diseases such as tuberculosis.

How do construction workers get exposed to silica dust?
Concrete and masonry products contain silica sand. Since concrete and masonry are primary building materials, there are numerous ways for construction workers to be exposed:
Abrasive blasting using silica sand as the abrasive.
Abrasive blasting of concrete.
Chipping, hammering, and drilling rock.
Crushing, loading, hauling, and dumping rock.
Chipping, hammering, drilling, sawing, and grinding concrete and masonry.
Demolition of concrete and masonry structures.
Dry sweeping or pressurized air blowing of concrete sand or sand dust.

How is silicosis prevented?
The key to silicosis prevention is to prevent dust from being in the air:
When sawing concrete or masonry, use saws that provide water to the blade.
Minimize exposure to nearby workers by using good work practices.
Use respirators approved for protection against silica.
Do not eat, drink, or smoke near crystalline silica dust.
Wash hands and face before eating, drinking, or smoking away from exposure area.

What are symptoms of silicosis?
Silicosis is a disease where scar tissue forms in the lungs and reduces the ability to extract oxygen from the air. Symptoms include:
Shortness of breath
Fever
Fatigue
Loss of appetite
Chest pains
Non-productive cough