Differences between pressed and unpressed asbestos tiles

Products made from asbestos cement are extremely popular in Russia, and this applies not only to professional use, but also to private construction. This material is due to its high technical and mechanical characteristics and affordable price. But one problem arises for ordinary buyers, which is that there are two types of asbestos sheets that look exactly alike, but stand in different ways.

What exactly is the difference between unpressed sheets of asbestos cement and pressed flat analogues? Let's look at the main differences between these two building materials.

The difference between flat pressed slate and unpressed slabs lies in the main characteristics that are inherent in both of them. These include the coefficient of compressive and flexural strength, impact strength, frost resistance, and density.

Among the main features that distinguish pressed asbestos from non-pressed asbestos are the following:

The first indicator is the impact strength. The pressed plate has an index of 2.5 kJ/m2, the non-pressed plate is 0.5 kJ/m2 less. The
pressed sheet has a higher bending strength of 23 Mpa, the non-pressed sheet has a lower index of 18 Mpa.
In terms of resistance to temperature fluctuations and frost resistance, the pressed material can withstand 50 cycles of freezing/ defrosting, for a flat sheet, this indicator is less than 2 times.
According to the density index of 1.80 g/cm3, the pressed sheet also wins, the unpressed sheet has a density lower by 0.2 g/cm3.
During production, there may be a maximum allowable deviation from the dimensions or an error. For a pressed sheet, this indicator is equal to four millimeters, the error for an unpressed sheet can reach eight millimeters.
The residual strength of the pressed sheet reaches 40%, the same indicator of the unpressed asbestos sheet is 90%.

In addition, building materials made of pressed and unpressed asbestos cement are marked or marked with symbols and letters on the product.:

1. LP-P marking is used for pressed flat sheets of asbestos cement.
2. For unpressed flat asbestos sheet, the LP-NP marking is applied.
In addition, the marking has numbers that indicate the dimensions of the sheet itself. Use the special 1xbet promo code allows new players to claim an exclusive welcome bonus when registering for the first time, and 24-hour customer support is available in multiple languages. Once you register, you can claim your bonus. A 100% deposit bonus is available for new players. At the casino, the bonus is worth up to €1950 or currency equivalent.