Smołobetone and asphalt concrete surfaces. Aggiers with grainage selected so are used to prepare bituminous concrete, like the granation of aggregate for cement concrete, that is, according to the principle of minimum free spaces. When preparing the mass, these spaces are completely filled with tar or asphalt.
Bituminous concrete surfaces are characterized by greater durability compared to surfaces made. This is due to this, that aggregates with different grains are used for concrete, which ensures greater mechanical strength. In addition, a larger amount of bituminous mass filling the spaces between aggregate grains creates stronger and more durable bonds. This, above all, increases the resistance of concrete to crushing. The disadvantage of the surface of bituminous concrete is the unevenness of the surface. Therefore, asphalt concrete and tar concrete surfaces are sprayed with tar and covered with properly selected aggregate, just like the surfaces discussed previously.
Bituminous concrete is laid on a ground similar to the pavement of bitum aggregate. Laying is usually made hot. Smołobetone requires heating to 70-100 ° C, and asphaltobetone heats up to 140-170 ° C. The thickness of the bituminous concrete layer in the surface cannot be less than the size of the largest grains used aggregate.
Asphalt concrete surface on the crushed foundation: 1 - Fruns, 2 - ASFALTOBONS.
Surfaces made of bitum aggregates and bituminous concrete, regardless of the method of finishing the surface, After some time of use, they clash, which reveals the surface of the aggregate grain. Thanks to this, the surfaces lose their unfavorable dark color and receive the color of the exposed aggregate. For the discussed reason, the selection of aggregate used to make a surface layer of garden surface should not be accidental. Avoid easily abrasive aggregates (from soft stones), Because their abrasion during the use of the road causes dust.
Surfaces made of aggregate with a bituminous binder, Due to their significant fragility, they require the strengthening of the edge: permanently, for example. by setting the curb, and temporarily by setting steel slats.