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What is hyperpressing?
Hyperpressing is a method of obtaining building materials by mutual friction of finely dispersed particles of a substance under high pressure, leading to the breakdown of oxide films from the surface of these particles, with the formation of open juvenile surfaces, and cohesion (setting) between them - "cold welding". In the presence of binders, with a high chemical affinity for the substance of finely dispersed particles (for example, cement), the required pressing pressure and grinding depth are sharply reduced. The amount of binders is about 8-10% (cement), while in ordinary poured concrete stone it is about 28-30%.
Does hyperpressing have anything to do with vibro-compression?
No, it does not. Vibro-compression is a method of obtaining materials by packing particles of a substance with low pressure with vibration, in the presence of binders. The amount of binders is about 20-25% (cement), while with hyperpressing it is about 6-10%.
What is the strength of the brick coming out of the Press?
The bricks come out of the press with a mechanical strength of 20-30 kg/cm2, sufficient for their handling and palletizing. For 3-5 days of maturation in a warehouse, bricks gain 60-70% of the final strength (140-160 kg/cm2). The time of full maturation of bricks is 28-29 days.
Do the products coming out of the Press need to be fired or steamed?
No, they do not. They need to be aged in a maturing warehouse for 3-5 days. It is good to regularly water the floors in the warehouse to maintain a humid environment in it.
Why are not fully ripened products released?
After 3-5 days of exposure, the products reach sufficient strength for their safe transportation and installation, with good resistance to external atmospheric influences. With a 3-5 day exposure, the volume of the warehouse is reduced by 6-9 times, compared with the volume of the warehouse for full exposure.
Does the product still remain unripe after it is laid in the wall?
No, it ripens in the masonry and is even better than in the warehouse, as it is surrounded by a moist solution similar in chemical composition.
Why are only mineral waste (stone screening)?
The basis of natural building material (stone) has always been mineral substances. Being engaged in the restoration of natural stone, one should proceed from its own minerals, especially using a binder of the same mineral origin - cement.
Is clay suitable as a raw material?
Suitable, but only in a stone, burnt state.
Clays are finely dispersed unconsolidated, but bound sedimentary rocks, consisting mainly of clay minerals - water silicates with a layered structure, when tribopressed in an unfired state, do not under "cold welding" due to the high moisture content.
Which raw material is the most acceptable in terms of its nature?
Any of the above is acceptable, of course, with preferences. In the production of bricks - dolomitic or marl limestone from soft varieties (shell rock) - provides high physical and mechanical properties of bricks (240-250kg/cm2, with 150MRZ), reliable repeatability of results and low mold wear. In the production of paving slabs - paving stones - either hard limestone or soft granite (200-300 kg / cm2) - provide high physical and mechanical properties of the tile (600-750 kg / cm2, with 500 MP3), reliable repeatability of results and normal wear of molds .
Vibro-blocks and hyper-pressed bricks - are they the same thing?
No, it is far from the same thing. Bricks have mechanical strength, that is 4-5 times greater, water absorption, that is 5-7 times less, frost resistance (MRZ), that is 10-12 times higher compared to vibro-blocks.
What is the difference in the use of vibro-blocks and hyper-pressed bricks?
Vibro-blocks are used for low-rise country and industrial construction, with mandatory external and internal plastering and painting, and bricks, as facing, in load-bearing walls, without restrictions on either the number of geographic zones.
Is there a difference in the ecological purity of vibro-blocks and hyper-pressed bricks?
Yes there is. With the normal purity of the main raw material, cement is responsible for the environmental friendliness of the building material: the more it is, the higher the radiation intensity of the carcinogenic gas radon. The intensity of radon emission by traditional concrete is 3 times higher than that of the Earth, by vibro-blocks - 2 times, by bricks - below the level of Earth radiation.
Sand-lime brick and hyper-pressed brick - is this something close?
No, of course not. Brick has higher mechanical strength and frost resistance. This difference is revealed 2-3 years after construction, on the quality of faces and edges of facing silicate and hyperpressed bricks on the facade.
Is it possible to build multi-storey buildings from hyper-pressed bricks?
Sure. Brick has mechanical strength 200-250kgf/cm2, and the applied one must have at least 150 kgf / cm2.
Are traditional poured paving slabs and hyper-pressed slabs is the same thing?
No, it is far from the same thing. Pavement-road hyperpressed tiles have: mechanical strength 2-2.5 times more, water absorption - 2-3 times less, frost resistance (MPZ) 1.5-2 times higher, compared with paving slabs.
Are there geographic restrictions for hyper-pressed materials?
No, they do not exist. Conversely, bricks and tiles are recommended for areas and areas with both gentle and severe atmospheric conditions due to their high strength and frost-erosion resistance.
Is there a color limit for hyper-pressed products?
No, the color gamut of products is extremely wide. Coloring is achieved either by adding inorganic pigments or finely crushed colored stones to the press mass.
Does the color of the product depend on the color of the main raw material?
Yes, it depends, the lighter the main raw material, the purer the final color of the product.
Is it possible to have a beautiful product without pigment?
Yes, definitely. For example, a light shell rock gives an excellent color to facing bricks and is in greater demand than a red-colored one.
Are curly bricks possible?
Yes, they are. Brick perfectly grinds to any shape under the action of a whetstone in a stream of water. In this way, bricks are obtained for architectural ornaments around windows and doors, as well as for decorating the corners of buildings and columns.
