The use of red sandstone is extensive, and its application in the construction industry is very important. Red sandstone is rich in color and hard in texture. It can be used for a series of processing. After processing, the product can be used as a home improvement material, so it is the first choice in many home improvement applications. Then Xiaobian introduced to everyone the red sandstone in granite is what kind of material stone, which features, red sandstone density and other related knowledge.
Red sandstone introduction:
The red sandstone is also called redstone red in some places, mainly in the southern provinces. In the basic characteristics of sandstone: The widely existing mudstones in the southern provinces, sandy mudstones, muddy sandstones, sandstones, shales, and other sedimentary rocks, red sandstones are rich in oxides that are red, dark red, or brown. It is collectively called red sandstone.
The red sandstone mainly has two typical structural forms: granular debris structure and muddy cementation structure. The strength of the red sandstone varies greatly due to the difference in cementation and weathering. After most of the red sandstone is excavated or blasted out, it can be disintegrated and broken or even argillized by the action of atmospheric environment. Therefore, the size and particle size distribution of the rock block will change with the time course of dry-wet cycle, and its physical and mechanical properties are also Will produce changes.
Red sandstone is also known in some places as red rock red mainly in southern provinces. In the basic characteristics of sandstones, rocks, such as mudstones, sandy mudstones, shaly sandstones, sandstones, and shales, which are widely found in southern provinces, are rich in oxides, red, dark red, or brown. These rocks are collectively called red sandstones. . There are two typical structural forms of granular granular structure and muddy cement structure in red sandstone, and their strength varies greatly due to the difference in cementation and weathering. Most red sandstones can be disintegrated and broken or even argillated after they are excavated or blasted out. The size and particle size distribution of the rock blocks will change with the time course of dry-wet cycle, and their physical and mechanical properties will also change.
Red sandstone classification:
Red sandstone is divided into the following three types according to strength and disintegration characteristics:
(1) The natural uniaxial compressive strength of a type of red sandstone rock is less than 15Mpa, dried at 105°C and then slag-like, mud-like or granular disintegration within 24 hours after soaking;
(2) The natural uniaxial compressive strength of the second kind of red sandstone rock block is less than 15Mpa or slightly larger than 15Mpa. After being dried at a temperature of 105°C, it is massively disintegrated within 24 hours after soaking in water;
(3) The natural uniaxial compressive strength of the three types of sandstone rock blocks is greater than 15Mpa. There is no difference between normal sandstones and non-disintegration characteristics of sandstone rocks.
Mainly used in construction. Today, not only does it have a certain application in architecture, it also plays an important role in decoration. It has the function of preventing moisture and absorbing noise. It is the first choice for today's new decorative materials.
The first and second types of red sandstone have the following characteristics:
1, water disintegration and expansion
The red sandstone is exposed to the air after blasting excavation. Under the repeated action of sunlight and the atmosphere, especially rainwater, it is easily disintegrated into small pieces with a slight increase in volume, and the expansion rate is about 1-4%. After disintegration, the red sandstone is softened by water, and the soil strength decreases rapidly (the rate of decline is as high as about 40%). It is easy to be a sludge-like under the action of mechanical and human forces. When a fully loaded car walks on a compacted test road The maximum visible 20mm deep rut.
2, high water absorption, water permeability and difficult to evaporate
Once the red sandstone is disintegrated or rolled into fine particles, its water absorption increases, and it quickly reaches saturation; using red sandstone as a subgrade filling material, although the compaction degree can meet relevant requirements, the soil remains large in the body. Porosity; water absorption and saturation of red sandstone under the strong light, the role of the wind under the slow evaporation of water evaporation generally takes about 1 day to complete the evaporation, but the evaporation is more thorough, and easy to dust under the action of the vehicle.
3, low viscosity
The red sandstone recombined after crushing has poor adhesion and looseness. It is difficult to obtain block samples when the compaction degree is measured. This shows that the red sandstone subgrade is poor in integrity or plateability, and its strength is irreversible. Sex.
4, easy weathering
Once the external force is destroyed, the red sandstone is easily weathered under the influence of the atmosphere and sunlight and rain. In case of water, it is not only softening, but also accelerating the weathering process of the soil. After several times of wet and dry cycles, the red sandstone is easily weathered and broken. Class I and Class II red sandstones are mostly used on the highways below Area 93 (including Area 93), where the soft soil roadbed, the roadbed above the normal water level and the roadbed with a filling height greater than 12m are not used, and the excavation section road rollers are often used for super Dig for sealing. When red sandstone is used as roadbed filler, Class I and II red sandstones are treated by filling roadbed and should be treated by pre-disintegration, ramming, edging, sealing and other measures. The three types of red sandstone are treated according to the roadbed.
Red sandstone density:
Domestic sandstone variety density list
Sandstone species bulk density (g/cm3) Sandstone species bulk density (g/cm3)
Shandong Yellow Sandstone 2.50g/cm3 Shandong Red Sandstone 2.60g/cm3
Shandong green sandstone 2.6g/cm3 Shandong purple sandstone 2.40g/cm3
Shandong grey sandstone 2.6 g/cm3
Sichuan Huangmu sandstone 2.50g/cm3 Sichuan green sandstone 2.50g/cm3
Sichuan yellow sandstone 2.36g/cm3 Sichuan rosewood sandstone 2.50g/cm3
Sichuan White Sandstone 2.40 g/cm3 Sichuan Grey Sandstone 2.5 g/cm3
Sichuan Red Sandstone 2.31 g/cm3 Sichuan Black Sandstone 2.6 g/cm3
Sichuan red peach wood sandstone 2.60 g/cm3 Sichuan gray wood sandstone 2.6 g/cm3
The above is related to the introduction of red sandstone density, classification of red sandstone, and characteristics of red sandstone. If you want to know more relevant information, please pay more attention to this site and provide more comprehensive, more detailed and updated information.
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