Like asbestos, Crystalline silica, is also a naturally occurring substance, and also it is a basic component of soil, sand, granite, cement, concrete and many others and these dust can be generated in many construction activities, including cutting, sawing, grinding, crushing, sanding and drilling. It is not easy to be exposed as the substance has to be fine enough to inhale, and even then it would need to have been inhaled in fairly large quantities.
The lung is the primary target organ of concern. Asbestos and Silicon are crystalline in nature, and both contain fibers which make humans inhale easily. Crystalline silica is harmful but will only impact certain individuals with very specific job roles and exposure levels. As compared to asbestos the effects of Crystalline silicon are not immediate. Like asbestos, the effects of respirable crystalline silica has a long latency period.
We all know the side effects of asbestos, the exposure of the silica also causes many hazardous diseases. The main difference between the two is how people are exposed to the fibers. The inhalation of asbestos is very easy whereas crystalline silica is often found in solid substances, which need to be processed to extract the silica compound. Asbestos can also cause harm from minimal exposure whereas illnesses from crystalline silica are caused from high levels of exposure.
How dangerous is silica dust?
Inhaling crystalline silica can lead to serious, sometimes fatal illnesses including silicosis, lung cancer, tuberculosis (in those with silicosis), and chronic obstructive pulmonary disease (COPD). In addition, silica exposure has been linked to other illnesses including renal disease and other cancers. The continuous exposure to silica particles causes scarring in the lungs, which can harm your ability to breathe.
Does concrete contain silica?
Crystalline silica is a common mineral found in the earth’s crust. About 2.3 million people in the U.S. are exposed to silica at the worksite when they work with materials like sand, stone, concrete, and mortar. Disturbing the materials containing silica can cause the exposure of the fibers into the air and it lead to many respiratory diseases.
Those at risk of illness tend to be people who have worked in :
- Workers at Cement manufacturing sites
- Foundry workers
- Quarry works
- Individuals who have cut stone drilled rocks regularly.
- Carried out sandblasting or manufactured building materials.
The health implications can be failure or disaster because it is difficult to remove dust particles embedded in the lungs. The most common illness caused by the inhalation of Crystalline silica is known as silicosis, but many will simply be diagnosed as having respiratory diseases, especially if they have a history of smoking. In many cases, the treating doctor may not have appreciated the possible link between the work history of the patient and their chest problems. The knowledge about the diseases and their symptoms will help to diagnose the diseases easily.
Asbestos and Silica-Related Diseases
- Asbestosis (will take 10 to 20 years to develop after exposure)
- Silicosis (usually 10 or more years of exposure to crystalline silica)
- Exposures must be very high to get asbestosis or Silicosis – much higher than for cancers.
- Mesothelioma (30 to 45 years after exposure to asbestos fibers in some cases as few as 5 years)
- Lung Cancer (often associated with asbestosis or silicosis; long latency periods – years to decades)
- Chronic silicosis: Develops only after exposure over decades.
- Accelerated silicosis: Over a shorter period of time (5 to 15 years)
- Acute silicosis: Appears 10 to 30 years after exposure
Symptoms of acute silicosis include:
- Rapid onset of severe disabling shortness of breath
- Weight loss, often leading to death
Prevent the development of silicosis by following some simple tips:
- Know the dangers of breathing in crystalline silica dust, and avoid working in or near dust whenever possible.
- By taking proper awareness training from any affiliated institutions and take precautions before disturbing silica containing substances.
- Always remember: Even if you cannot see dust, you may still be at risk.
- Use water spray systems and proper ventilation in confined spaces.
Silica containing substances : Identify and control hazards
- Industry Information Sheet (silica)
- Toolbox Meeting Guides (silica)
- Sample Exposure Control Plans:
- Cutting fibre cement board
- Cutting, grinding, and polishing stone containing
- Crystalline silica
- Grinding concrete
- Cutting and drilling concrete
- Jack hammering and chip hammering
- Cutting small amounts of gypsum board containing asbestos
Millions of pounds have been paid to individuals and family members who have either suffered or lost a loved one as a result of asbestos exposure. The amount of compensation paid to those families may not be replicated in cases of crystalline silica exposure but it would appear that there are cases to be answered. If an employer has exposed their workforce to harmful levels of crystalline silica then they may have caused preventable illnesses and shortened an individual’s life expectancy, meaning families lose their loved ones sooner than expected.