Sale and delivery of mineral powder is carried out on special semi-trailers tanks cement trucks. In the tank of the cement truck pump mineral powder directly at plant. Further the driver of the bulk cement transport vehicle on object of unloading by the special compressor forces air in barrels, thus creates in it pressure. Then turn off the gate and begin pumping of mineral powder.
Mineral powder - stone flour, dust, key material at a construction of roads. The main scope of mineral powder - production of artificial asphalt at asphalt concrete plants where minporoshok serves as the filler increasing viscosity and the gluing ability of bitumen. Mineral powder for asphalt concrete. Thanks to the developed surface adsorbing on itself the most part of bitumen, mineral powder gives to asphalt concrete necessary properties, i.e. mechanical durability, ability to elastic and plastic deformations that significantly improves qualities of a paving, increases the term of its service and gives considerable economy at operation.
One of the most important components of asphalt concrete mixes is mineral powder. It increases density of structure, unites grains of sand and crushed stone in a strong monolith. As a result of comprehensive investigations and tests it is revealed that more others mineral powder on the basis of piroksenovy porfirit and a gabbro diabases is suitable for this purpose. It doubles durability of a paving approximately. If service life of a usual asphalt covering of 10-12 years, then thanks to mineral additives it can increase to twenty, and perhaps, and thirty years. The carried-out tests revealed one more important advantage of an asphalt covering with mineral additives - it practically does not absorb water, therefore, is not subject to almost its destroying influence.
Powder mineral is an important active structural component of asphalt concrete. Thanks to the developed surface adsorbing on itself the most part of bitumen, mineral powder gives to asphalt concrete necessary properties, i.e. mechanical durability, ability to elastic and plastic deformations that significantly improves qualities of a paving, increases the term of its service and gives considerable economy at operation. The expiration date of mineral powder is not limited.
Production of mineral powder is based on crushing and thin crushing of limestones and dolomite, and also solid waste of industrial production. The main scope of mineral powder - production of artificial asphalt at asphalt concrete plants where mineral powder serves as the filler increasing viscosity and kleyushchy ability of bitumen.
Mineral powder, thanks to the adsorbing surface absorbs in itself essential part of oil bitumen, giving to asphalt concrete the required characteristics: durability and resistance to deformations. Thanks to it, quality of the received asphalt concrete, and in fact and all future paving, significantly increases.
Mineral proroshok it is made according to GOST 512129-2003.
The standard extends to the activated and not activated mineral powders produced from limestones, dolomite, dolomitizirovanny limestones and other carbonate rocks and applied to production of asphalt concrete mixes. The standard does not extend to the mineral powders received from not carbonate breeds and powdery waste of the industry (dust of ablation of cement works and ashes of ablation of the combined heat and power plant) used as mineral powders for asphalt concrete mixes as it is specified in GOST 9128-76.Powder mineral: the material received at a grinding of rocks or solid waste of industrial production.
Powder mineral activated: the material received at a grinding of rocks or solid waste of industrial production with addition of the activating substances at a grinding of bituminous rocks, including combustible slates.
The activating substances: the mix of the surface-active substances (SAS) or products containing surfactant, with bitumen, which is rationally picked up in relation to the chemical nature of raw materials for production of mineral powder.
Breed is carbonate: the sedimentary breed consisting more than for 50% from one or several carbonate minerals, for example limestones, dolomite and versions, transitional between them.
Breed is not carbonate: the sedimentary or izverzhenny breed consisting more than for 50% from silicon dioxide minerals, for example a molding, bergmeals, tuf, sandstones, granites.
Powder waste of industrial production: the waste of industrial production which is not demanding crushing, for example: ashes of ablation and zoloshlakovy mixes of thermal power plants, dust of ablation of cement works, metallurgical slags, etc.
Classification of mineral powders
Powders depending on indicators of properties and the applied initial materials subdivide into brands:
MP-1-the powders which are not activated and activated from sedimentary (carbonate) rocks and powders from bituminous rocks.
MP-2-powders from not carbonate rocks, solid and powder waste of industrial production.