Slate

Classification：Metamorphic Rock

Rock with plate structure can be thinning along the direction of plate. In most cases, mudstone or shale is formed by compaction metamorphism. With the increase of burial depth, the degree of metamorphism is increasing, and slate, phyllite, schist and gneiss are formed in turn.

Slate is a rock with a plate structure, basically without recrystallization. It is a metamorphic rock. The original rock is muddy, powder or neutral tuff. It can be flake along the direction of the plate. The color of Slate varies with the impurities it contains. The formation of Slate (Slate), like sandstone, is a sedimentary rock formed by the crustal movement of the earth. The sand particles and cements (siliceous, calcium carbonate, clay, iron oxide, calcium sulphate, etc.) are compressed by a long period of great pressure. Slate is a low grade product from regional metamorphism, and its temperature and mean pressure are not high, which is mainly affected by stress. Slate is mainly composed of mineral particles or crypto crystalline materials, and its recrystallization is not obvious. It has obvious residual structure and plate structure.

The rock is Slate with a plate shaped structure. The protolith is mainly argillaceous, argillaceous siltstone and intermediate acid tuff. The recrystallization is not obvious. Under the microscope, there are muddy and some sericite, chlorite and siliceous. Sometimes a small amount of muscovite, biotite and quartz are found. It has a residual mud structure. Slate is a low grade product from regional metamorphism, and its temperature and mean pressure are not high, which is mainly affected by stress.

Taking the muddy and silty dominated slaty cleavage and development of metamorphic rocks. The composition of protolith is clay, siltstone or intermediate acid tuff, which is formed by regional low-temperature dynamic metamorphism. Slate is mainly composed of mineral particles or crypto crystalline materials, and its recrystallization is not obvious. It has obvious residual structure and plate structure. According to the impurity composition and color in rocks, it can be divided into carbonaceous Slate, calcareous Slate, sandy Slate, spotted Slate and so on. Slate with compact structure and plate development can be used as building stone and stone materials such as stele and inkstone.

Over the years, many facts have proved that natural stone has become one of the most popular flooring materials. They have some submersible
In characteristics, it is very suitable for the bathroom floor material. Slate, as a natural stone, has its own characteristics, making it an ideal bathroom floor material. Its advantages are as follows:
Aesthetic value: the popularity of Slate in home, including indoors and outside, is largely due to the aesthetic value of Slate. Its unique surface provides rich and varied designs and colors, all of which are natural. Brick and brick are different, which makes the bathroom unique. However, different colors and designs do not lead to incongruous patterns. In fact, this only adds to the beauty of the Slate bricks, because they give people a different feeling, which are not available to other floor tiles, even as natural stone tiles.
Durable and durable: the reason why Slate brick is the ideal material for bathrooms has another main advantage, that is, it is very wearable. That's why many people suggest installing Slate floor in the high flow area. In some cases, some owners will complain that there will be "traffic map" on the floor of Slate, that is, frequent flow of people leads to Slate wear and form potholes. This is not in line with the facts. It must be pointed out that the reason for causing the traffic map is the regular curing agent used on Slate bricks. To know the nursing of this special floor tile, we must record the curing agent used to know which type can be compatible with.
Anti slip: if the selected stone surface is correct, Slate brick can keep natural skid resistance. Otherwise it's dangerous when it's wet. Nevertheless, the skid resistance of Slate brick mainly depends on its uneven surface.
If the maintenance is not sufficient, the Slate brick is very easy to fade. Infiltration of large amounts of moisture will lead to the appearance of Slate bricks. Therefore, Slate should not be installed in a long period of humid areas, in some places, such as the shower area can be replaced by other materials or regular maintenance of curing agent.
Of course, Slate brick is neither perfect nor flawless. With the loss of time, they have cracks. Nevertheless, Slate bathroom floor material is the most sought after material in bathroom floor industry.

Slate formation:
The formation of Slate (Slate), like sandstone, is a sedimentary rock formed by the crustal movement of the earth. The sand particles and cements (siliceous, calcium carbonate, clay, iron oxide, calcium sulphate, etc.) are compressed by a long period of great pressure. At present, the main color is pale blue, black, green, pink, brown, gray, yellow, etc.. The slate is not only rich in texture, but also with hard texture, elegant color, low water absorption and no radiation pollution. It has the characteristics of sublight, antiskid, acid and alkali, fire resistance, cold resistance, weathering resistance and good resistance.
The mineral composition is mainly mica, followed by chlorite, quartz, a small amount of pyrite and calcite. The new slate of sand is higher, more calcium and pyrite, hard rock. The ore body is calcareous sericite Slate and Silverstone Slate, and the single layer thickness is 1-5cm.

Quality identification:
Test of Flatness:
A steel ruler with a straightness tolerance of 0.1mm is placed on the two diagonal lines of the examined surface, and the clearance between the ruler surface and the panel is measured by a feeler gauge or vernier caliper. The flatness of the sheet is indicated by the maximum gap value. The measured value is accurate to 0.1mm.
The inspection of the angle:
With the angle 0.13MM, angle perpendicularity tolerance length of 90 steel squares measurement 500mmx400mm. The short edge of the angle ruler is close to the short side of the plate, the long edge of the angle ruler is attached to the long side of the plate, and the maximum gap between the long edge and the angle length edge of the plate is measured with a tape measure or a vernier ruler. When the long side of the plate is less than or equal to 500mm, it can measure any diagonal angle of the plate. When the long side of the plate is larger than 500mm, the four corners of the plate should be measured.
The angle tolerance of plate is represented by the maximum gap value. The measured value is accurate to 0.1mm.
Inspection of appearance quality:
1., the pattern and tone will be placed on the floor with qualified plates and inspected plates, and stand up from 1.5m.
2., artificial chisel, lay the plank on the floor, and see it from 1.5m.
The number of color lines measured by the number of 3. color lines.
4., the length, width and height of the defects are measured with vernier calipers, and the number of missing corners is measured by vernier calipers.
The 5. step uses vernier caliper to measure the height of the step, and the maximum value is measured as the height of the step.
6. the crack can be seen by visual method, and the implicit crack is determined by hammering (that is, using a metal hammer to knock the sheet, through sound, and generally dumb sound to distinguish whether there is a crack).
7. stain. Use vernier caliper to measure the size of the stain and the number of spots.