Asph alt concrete is prepared from a special composition with the correct proportions of special components: sand, mineral powder, crushed stone of various sizes, as well as certain bitumen intended for roads. Asph alt concrete mixes are used for arranging the base and covering the roadway in almost any conditions. You can consider these materials in more detail.
Asph alt concrete mixes are divided into hot and cold according to the laying principle. The former are the most famous and actively used today. Their laying is carried out at a temperature of 140-170 degrees Celsius. The finished hot asph alt mix is delivered using special equipment. It saves the temperature of the composition. When paving is completed, compaction is carried out with asph alt rollers. After the composition hardens, a high quality coating is obtained.
Mixing is carried out using viscous bitumen. The mixture should be used immediately after preparation, it must not be allowed to cool. When laying the asph alt temperature should be 120 degrees or more. This technology is used for any work and in almost all latitudes. There are minor features. The upper layers of coatings are laid with the obligatory use of crushed stone, the fractionation of which is 20-40 millimeters, which affects the total cost of work. Hot mix asph alt concrete is the most enduring at the moment, which can be achieved through the use of bitumen. This method has another very important advantage - the opening of movement in the treated area is possible immediately after the mixture has cooled to ambient temperature, that is, it takes only a few hours. This period is enough for the mixture to have time to go through the forming phase, after which it is completely ready for use.
If asph alt concrete mixes are chosen as a material for repair work on the road surface, then their composition must be chosen as close as possible to the composition being repaired. With a defect depth of up to five centimeters, laying in one layer is carried out, and with a larger size of potholes, a couple of layers should be used. Small areas need to be compacted with pneumatic equipment, larger areas need to be compacted with a vibratory roller.
Different types of asph alt concrete mixtures are used for the arrangement of airfield and road surfaces, hydraulic structures,floors and flat roofs. The purchase of such materials should be made at enterprises operating with strict observance of all the technological features of their manufacture, and the cost will be optimal. It is clear that fine-grained asph alt mix will cost more, as it is a higher quality product designed for arranging very smooth surfaces. In general, the cost of such a building material depends on many factors, among which the quality of the components, the equipment and technologies used in the work, as well as a number of other factors are very important.
