How to choose the thickness of stone?

1, The thinner the plate, the weaker the pressure resistance

The strength of a rock is its ability to resist damage.

Under the action of external force, rock will be destroyed when the stress reaches a certain limit value, which is the strength of the rock.

When the plate thickness is thinner, that is to say, the plate compressive capacity is weaker, the more easily damaged plate; On the contrary, the thicker the plate, the greater the compressive capacity, the less likely the plate is to fracture and damage.

When the internal stress of rock reaches or exceeds a certain limit under external load, rock failure occurs.

Therefore, it can be concluded from this formula that the compressive strength of stone is directly related to the thickness of the plate:

Thin plate, poor compressive capacity, easy to damage

Thick plate, strong compressive capacity, plate is not easy to damage

2. The disadvantages brought by the thin stone thickness

It has become a trend for stone merchants to sell thinner and thinner boards.

In most of the large board market in the water head widely visible to those less than 16mm large board, especially good material, expensive stone businesses are more willing to thin the thickness of the large board. Because the stone is made too thick, the price of the big board rises, and the high price affects sales when customers buy it.

Making the thickness of the large plate thin can solve this contradiction, both sides are willing to.

1) Easy to fracture

Natural stone, especially a lot of natural marble itself is full of cracks, 20mm thickness of the plate is easy to fracture, damage, let alone the thickness of the plate is far less than 20mm.

Therefore: the plate thickness is insufficient to bring the most obvious evil result is the plate easily broken, damaged.

The color of cement and other adhesives will reverse osmosis

Stone material is thin, the adhesive such as cement when construction can pass the crack of stone material, come up through the capillary hole of itself of stone material surface counter-seepage.

This kind of phenomenon is right white kind stone material, the stone material that has jade qualitative feeling and other light color stone material expression is most apparent.

When the color of cement and other adhesive materials infiltrates to the stone surface, the surface effect will be greatly affected. Make originally beautiful stone become extremely ugly.

The stone surface can be seen cement color traces, this is because the cement through the cracks of the stone surface to the stone surface if the thickness of the stone cement is not possible to infiltrate the stone surface

③ Poor carrying capacity

The granite used in the reconstruction of Tiananmen Square in Beijing was 100mm thick.

The reason for using such thick granite is to consider the square people, heavy vehicles to pass through, the use of such thick stone its bearing capacity is large, will not be damaged under heavy pressure.

The impact resistance is weak

There is a Chinese saying: cannot withstand a single blow. To be weak and unable to withstand a blow

"Thick" and "thin" are words with opposite meanings, but they have different meanings for stone plates:

Thick plate, its strong impact resistance

Conversely, the plate is thin and its impact resistance is weak

⑤ Easy deformation, warping

Over the years, the use of artificial stone consumers reflect the deformation and warping of the stone, especially large specifications, long length and narrow width of the stone product deformation and warping are more serious.

Cause analysis to analysis, in addition to the quality of the artificial stone product itself, there is a very important reason is that the thickness of the artificial stone plate is not enough.

Almost all the manufacturers of artificial stone plate in order to reduce the price of large plate, have higher competitiveness in the market, the thickness of large plate is 16.5mm.

The bending strength of sheet metal with thickness of 16.5mm is lower than that of sheet metal with thickness of 20mm.

A domestic artificial stone production enterprises to the sales staff to undertake artificial stone floor plate order sheet thickness must be 20mm.

When customers insist on using 16.5mm thick sheet as the floor, the sales staff can refuse this project. Instead of dealing with the various problems caused by the thickness of the artificial stone is too thin, it is better to put forward the stone thickness standard in advance, so as to avoid the deformation, warping and other quality problems of the stone after construction.

⑥ Poor dimensional stability

Dimensional stability refers to the material under the action of mechanical force, heat or other external conditions, its shape size does not change.

Dimensional stability is a very important technical index to measure the quality of stone products.

Dimensional stability is related to the thickness of stone:

Plate thickness thick, dimensional stability is relatively good

Thin plate, poor dimensional stability

3, Construction sites should pay special attention to the thickness of stone

The stone material adornment that uses which kind of thickness after all in building adornment is better, should specific circumstance is specific analysis, cannot generalize.

① The thickness of exterior wall products and interior products should be treated differently

In the 1990s, the thickness of granite and marble plate of stone exterior wall is not less than 30mm. With the advance of The Times, the thickness of granite stone products for stone exterior walls has become 25mm, and some projects even have marble thickness of 25mm.

From the perspective of mechanics, the thinning of exterior wall product thickness means that wind load resistance, impact resistance and bending resistance are declining, which also means that buildings decorated with stone are full of various safety risks. As long as the conditions are available, hidden security risks may erupt at any time, resulting in serious safety accidents.

② Granite and marble product thickness should be distinguished

From the physical and chemical properties of the rock, marble strength, surface density, water absorption and other physical and chemical indicators are lagging behind granite.

Accordingly, no matter exterior wall stone material or indoor stone material, marble product thickness should be thicker than granite product just more safe and reliable.

(3) The thickness of the panel should be different from that of the product

Table panel products are more and more used in the decoration of buildings, from star hotels, office buildings, government offices, family homes can be seen everywhere table panel figure, the thickness of table panel has a great impact on the safety of table panel.

The table panel has a hole table panel and non - hole table panel.

The thickness of the table panel is determined by the way of drilling or not.

The plate thickness of the digging table panel should be greater than that of the non-digging table panel. Because the table is dug after the hole, the strength of the table is greatly reduced, the strength of the table can be improved by increasing the thickness of the table.

But although the strength that raises stage face plate also can improve strength through reinforcing means, but craft method is complex, be inferior to the ply that raises stage face plate properly will improve stage face plate integral strength.

The marble below 18mm thickness had better not be used at the processing of table face plate.

The thickness of the panel should be different according to the installation method

The installation of the table panel determines the thickness of the processing table panel.

The platform panel adopts the scaffolding installation mode, because the platform panel depends on a few support frame to support the platform panel, without support frame support is the weakest place of the platform panel, vulnerable to damage under the action of external force or heavy pressure, resulting in product breakage.

The thickness of the platform panel used for supporting installation should be thicker than the thickness of the platform panel as a whole on the entity. Figure 4 shows the hanging platform panel. The thickness of this installation is thicker than that of the non-hanging installation. Because suspended place is stage face plate gets force the weakest place, be in get external force or below heavy object action extremely easy from suspended empty place fracture, damage.

(5) stair stepping products should be processed by stone not less than 30m thick

In a lot of places to see a lot of stone decorative stair step board cracking, front end damage. The main reason is that the thickness of stair step board is too thin.

And at present the stair step board of a lot of buildings in China is multi-purpose the plank processing of thickness less than 20mm, some even have the plank processing of 15mm only, only by adding the way of sticking the edge thickens the stone material. How can the strength of stair stepping board processed in this way not fracture and damage?

The thickness of stone material is different

Because natural stone material is qualitative different, its each physical and chemical performance index is different also.

The nature of natural marble and natural granite is completely different.

The different marble in natural marble has its own strengths and weaknesses. It is ok to use 20mm thick stone decoration in this place. When using another stone decoration, 20mm thick stone may not be appropriate. It is necessary to make appropriate adjustments according to the characteristics of the stone used to ensure that its strength meets the requirements of safe use.

The thickness of floor products and wall products should be different

The thickness of the stone plate used for ground decoration is at least 5mm thicker than the thickness of the plate used for wall decoration, because the ground stone should accept external force impact and pressure from all sides. Over time, the breakage occurs.

The wall plate is less affected by external forces, not easy to be damaged. However, designers of this concept are in short supply. The thickness of the stone used on the ground is the same as that of the wall.

The thickness of the ground stone is less than 16.5mm, and even the thickness of the stone used in crowded public places is very thin. This situation should be valued and changed.

The application site is not the same thickness should not be the same

Stone thickness should be changed as the application of different places.

Like large public square, if the ground of square of Beijing gate, railway station, stadium uses stone material its thickness is greater than the ground of guesthouse, shopping mall, office building. Because these sites not only have a lot of people passing through them every day, but maybe a lot of cars as well, and heavy equipment as well, putting a lot of pressure on the ground. If the stone used in these places is too thin, it won't take long for the stone to be crushed.

Compared with the metope of interior decoration and the ground, the wall panel can be a little thinner than the ground panel.

Because wall face plate is installed on the wall the opportunity that suffers external force to pound is small, and the heavy weight that ground face plate should bear furniture and other clog, the pressure that bears is bigger than wall face plate.

The stair step board in ground face plate, thickness should compare ground face plate some taller again. Because stair step board is long and thin strip, easy to fracture and damage after pressure.