How harmful is asbestos tile?

Many years ago, asbestos tiles were widely used as building roofing materials, thermal insulation and sound insulation materials. However, it was later found that asbestos fibers in asbestos tiles could float in the air for a long time, which did great harm to human health. Since then, they have become internationally recognized outdated building materials. What material is asbestos tile made of? How harmful is asbestos tile? Let's take a closer look. What is the material of asbestos tile? Asbestos cement tile is a top waterproof material made of asbestos fiber and cement.

Asbestos tile is a natural mineral, which can be divided into two categories according to its formation: fiber serpentine building and amphibole asbestos. The most common asbestos we see is fibrous serpentine asbestos, so this kind of asbestos is the most useful. This kind of asbestos is also called chrysotile asbestos.

Thermoasbestos in asbestos tile accounts for about 15~20%, and ordinary portland cement accounts for 80~85%. They can be firmly combined, so there is no asbestos dust flying and harm to human body.

Advantages and disadvantages of asbestos tile The advantages and disadvantages of asbestos tile are 1. Compared with color steel roof, asbestos tile is simpler to manufacture and lower in cost.

2. Asbestos tiles can alleviate the degree of hot summer and cold winter brought by colored steel plates.

3. The asbestos tile has a large single area and a large effective utilization area.

4. It also has the characteristics of fire prevention, moistureproof, anticorrosion, heat resistance, cold resistance and light weight.

Disadvantages 1. After the asbestos tile is used for a long time, it will be unstable due to wind and rain, which will easily lead to asbestos tile falling off, causing indoor water leakage and affecting later use.

2. Asbestos tiles are made of special materials, and their service life will not be too long. It will age after almost three years of use, which will affect the normal use in the later period.

3. Asbestos tiles are fragile and can't stand the beating of hard objects, otherwise they will be easily damaged, which will lead to the failure of normal use in the later period.

4. If asbestos tile installation does not meet the requirements, or the construction is not very standardized, it is easy to reduce the overall safety factor. In stormy weather, asbestos shingles may fall off and bring danger.

What kind of building is suitable for? Roofs are generally used in low-rise buildings. Asbestos tiles are used as building roofing materials, thermal insulation and sound insulation materials, and are used in buildings, ships, railway vehicles, etc. Gasket material, automobile brake pad, clutch plate, insulating material.

Service life of asbestos tile The service life of ordinary asbestos tile is about 5-8 years, and the good quality can reach 15 years.

The price of asbestos tile depends on the quality and specifications when you buy it. Usually 20-70 yuan is about one square meter.

Size of asbestos tile The size of ordinary asbestos tile is 1800mm by 45mm, and the area is 9.6 1 m2.

The dimensions of corrugated asbestos tile are: wave distance 13 1mm, wave height 3 1mm and wave number 5.7.

Its product thickness includes five specifications: 4.5mm, 5.0mm, 5.5mm, 6.0mm and 7.0mm..

Which is durable, asbestos tile or resin tile? Advanced three-layer extrusion technology is adopted. On the basis of retaining the advantages of the original PVC plastic-steel tile, ASA high weather-resistant engineering resin was selected and extruded with PVC resin material through a special process, which made a great breakthrough in weather resistance, corrosion resistance, aging resistance, impact resistance, antistatic property and cleanliness of the product, and made a qualitative leap to the original technology. In terms of specifications, it is equipped with a series of accessories of different sizes and shapes. The raw materials produced are environmentally friendly and healthy, and will not cause harm to human products, which meets the national environmental protection standards of Taiwan Province. Asbestos tiles were replaced for some reason. With the continuous improvement of people's quality of life, more and more people pay more attention to health, so it is inevitable that asbestos tiles will be eliminated.

The harm of asbestos tile to human body asbestos tile contains glass fiber and tiny asbestos fiber; When asbestos shingles are shaken or destroyed, this fiber easily floats in the air and is inhaled by people. It doesn't matter if a small amount in the body exceeds the standard, it is easy to cause lung diseases and even cancer.

Moreover, asbestos fiber glass fiber can never be degraded, causing serious irreversible pollution to the environment. It must not be discharged from human body or animal body through air or food water, and the carcinogenic rate is very high.

Exposure to asbestos fibers can lead to the following diseases:

1, lung cancer

2, mesothelial cancer-pleural or peritoneal cancer

3. Asbestosis-lung scarring caused by pulmonary fibrosis (asbestosis).

Asbestos has been recognized as a carcinogen.

Asbestos tile installation construction installation 1, roof slope should not be less than 1/5. The purlin spacing of medium-small wave tile is 800 mm, the length of peach eaves shall not exceed 300 mm, the overlapping length of both ends is 200 mm, the two overlapping medium-small wave tiles are 90 mm, and the small wave tiles are 1 half wave, so the external take-off meets to avoid the dominant wind direction.

2. Ceramic tiles are fragile materials. To cut corners in construction, you must use a saw or grinding wheel to cut corners, not an axe and pliers. The size of the cutting angle is to ensure that there is a gap of 2-3mm between the two corners when the tiles are butted.

3, ceramic tile drilling application hand drill or hand electric drill in the construction site, not directly with nails, so as not to crack. The aperture should be 2-3mm larger than the diameter of tile nail (hook).

Fixed method 1. Wooden purlins can be nailed with galvanized square head screws, and the pad iron and rubber pad can be fastened. The hole of the iron pad is 2 mm larger than the nail. The rubber pad is 5 mm thick and 30 mm in diameter, and the inner hole is smaller than the nail. For steel or reinforced concrete purlins, 8 mm galvanized tile hooks should be used and fixed with nuts, and iron pads and rubber pads should also be used.

2, the front and back of the tile must not be mistaken. The small wave tile at the nail (hook) hole is at the top of the third and ninth arcs, and the medium wave tile is at the top of the second and fifth arcs, not at the bottom of the arc, so as to avoid water leakage at the nail (hook) hole. It is forbidden to fix it at the overlap of two tiles.

3. Due to the influence of the environment, tiles are easy to shrink, expand and warp. Therefore, the fixed points of ceramic tiles should not be too many and too tight to ensure that ceramic tiles have a certain degree of freedom, otherwise internal stress will occur and lead to cracking. Generally, two nails (hooks) can be used in the middle part, and 1-2 nails (hooks) can be added at the outer edges of eaves, roofs and gables. Nail positions with different hook numbers: two nails per tile: one nail in the middle purlin and one nail in the lower purlin on the blank holder side; One tile and three nails: one in the middle purlin and one on the compression side of the lower purlin; One brick and four nails: one on each of the four sides of the middle purlin and the lower purlin.

4. The fixing of tile nails (hooks) should not be too tight. Generally, there should be a gap of 5-8 mm between the nail cap and the ceramic tile surface to avoid cracking due to stress caused by thermal expansion and contraction.

5. It is forbidden to stand directly on the surface of the ceramic tile under construction and fix it. Tiles should be in a free state, so as to avoid the construction stress of the tile body under compression deformation, which will cause cracks in the future.

The repair method of asbestos tile roof leakage can spread plastic wrap or plastic cloth on the surface of asbestos tile, which can effectively prevent rainwater from infiltrating. If you think it is not practical to spread plastic wrap, you can buy waterproof asphalt and apply it to the leaking position of asbestos tile, which can better solve the water leakage problem.