Asbestos is a fibrous mineral known since antiquity. Throughout history, it has been widely used in industry due to its excellent physical and chemical properties, such as heat resistance, flexibility, and durability, making it an ideal material for various industrial and construction applications. However, over the years, it has been discovered that exposure to asbestos poses a severe health risk, especially to the respiratory system, due to the microscopic fibers that can be released and inhaled.
In this article we will explain in detail everything you need to know about asbestos, including its characteristics, types, uses throughout history and the main health risks posed by exposure to its toxic fibers.
Main characteristics of asbestos
Asbestos is primarily known for its resistance to heat , abrasion, alkalis, and acids, as well as its flexibility, making it a suitable insulating material in various industries, including textiles, automotive, and construction. There are several types of asbestos, but all are silicates of iron, sodium, magnesium, and calcium arranged in very fine fibers.
Among the most notable characteristics of this mineral are:
- Your discharge thermal resistance, with a melting point above 1.000 ºC.
- Es resistant to alkalis and acids, which makes it useful as an insulator in industry.
- It has a fiber structure, which allows its use in various fields, such as textiles and construction.
- It is not easily destroyed, being highly durable and fireproof.
Because of these properties, asbestos was used extensively in various industries for most of the 20th century. However, studies conducted over the years have shown that asbestos fibres can remain in the lungs for a long period, causing serious damage to health, as we will see later.
Uses of asbestos throughout history
Asbestos has been used since ancient times in a variety of applications due to its unique properties. Records of its use date back to the 4.500th century BC. In ancient Greece, for example, wicks for temple lamps were made from asbestos fibres. In Finland, traces of asbestos were also found in ceramic objects dating back XNUMX years. This shows that knowledge of its properties has been used by various civilisations throughout history.
However, its greatest boom occurred in the 19th century with the increase in industrialization, and especially since the Second World War when it began to be used massively in buildings, industrial products (such as pipes, tanks, insulation, roofs and more ), as it was considered a versatile, reliable and cheap material.
Among the most notable uses of asbestos are:
- Construction: Insulating material for roofs, walls and floors, especially in the form of fibre cement (also known as asbestos cement).
- Automotive: Manufacturing of brakes and clutches for vehicles.
- Textile industry: Fireproof clothing and protective material.
- Naval industry: Thermal and acoustic insulation in boats.
asbestos classification
The term asbestos refers to a group of minerals that are primarily classified into two main groups: serpentines and amphiboles . This classification is based on the structure of their fibers, whether they are curved or straight, respectively.
These are the most important types of asbestos:
- Serpentine group: Includes the chrysotile or white asbestos, known to be the most widely used in industry (it accounts for 95% of industrial use).
- Amphibole group: It covers several types, such as amosite (brown asbestos), the crocidolite (blue asbestos) and other less known ones such as tremolite, the actinolite and anthophyllite.
Chrysotile is more flexible and more common in industry, while amphiboles are more brittle but highly resistant to chemicals. The latter, especially crocidolite and amosite, are considered the most hazardous to health.
Dangers of asbestos: Why is it so dangerous?
The main problem with asbestos lies in the release of microscopic fibers into the air, which can be easily inhaled. Once these fibers enter the respiratory system, they can become trapped in the lungs. This can lead to inflammation, scarring, and, in more serious cases, life-threatening diseases such as mesothelioma and lung cancer.
The danger of asbestos also depends on factors such as the duration of exposure and the concentration of fibres. The smallest particles are the most dangerous, as they can penetrate deep into the lungs.
Studies on asbestos and health
Numerous scientific studies have investigated the effects of exposure to asbestos. Research beginning in the 20th century found a strong link between inhalation of asbestos fibres and health problems. One of the first animal studies showed that long fibres are much more pathogenic than short ones, as they were more difficult to eliminate through the respiratory system.
Furthermore, asbestos fibers are not only capable of causing fibrosis in the lungs, but are also associated with the proliferation of malignant cells, as in the case of cancer. The World Health Organization (WHO) has classified asbestos as a Group 1 carcinogen , meaning there is sufficient evidence that all forms of asbestos can cause cancer in humans.
Regulations and prohibitions on asbestos
In countries such as Spain, the use of asbestos was banned in 2002 after decades of medical warnings and social pressure. In many other countries, regulations have followed the same path, given the devastating effects of asbestos on health.
The complete ban on asbestos in the European Union was established in 2005, but there are still old buildings and products that contain asbestos, posing a challenge to public health.
Key points for safe removal of asbestos
Asbestos removal should only be carried out by qualified personnel familiar with safety regulations, as any improper handling may release dangerous fibres.
- Handling and removal: Only specialized companies can remove materials containing asbestos, using appropriate equipment and following strict protocols.
- Security measures: The use of Respiratory Protection Equipment (RPE) and disposable suits is essential during the removal process, along with the creation of containment bubbles to prevent the dispersion of fibers in the air.
- Proper arrangement: After removal, waste must be packaged and taken to special approved disposal sites, minimising any risk to public health.
Despite the ban, there remains a need to safely remove and manage asbestos-containing structures around the world.
Knowledge of the dangers of asbestos has increased significantly, and current regulations seek to ensure maximum protection when removing asbestos and prevent exposure to it. Avoiding exposure is essential to safeguarding human health, and safety measures must be taken seriously in any intervention with asbestos.