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Ŝebënočnye coverRubble covering, as well as gravel roads are, (IV) and (V) categories with a little traffic (up to 200 vehicles per day) for the device of spreading coatings applied artificially crushed stone material, usually limestone, has a compressive strength of not less than 600 kgf/cm 2.For the lower and middle strata of the spreading grounds and coverings apply fractional rubble krupnostju 40-70 and 70-120 mm; for the top layers and coatings-40-70 mm to free-5-10, 10-20 and 20-40 mm. Crushed the weak rocks are larger than 70 mm.Arrange on a sandy coating covered subsurface sloeDlâ grounds can be used for other local materials(slag. cockleshell. gravel).The principle of the granular layer coating device is as follows. Rubble krupnostju 40 mm and higher scatter on a prepared base, even given the profile and to condense ice rinks until the disability ŝebenok. Then to free gradually scatter smaller stone material-rubble krupnostju 10-20 mm long and 5-10 mm. Ukatkoj reach full wedge ŝebenok. When ukatke crushed water, which facilitates mobility of ŝebenok in the ukadki and cemetacii and a pokrygiâ.Covered in korytnom cover profile in one layer with thickness of 10-18 cm, and a thickness of more than 18 cm-in two layers to the layer using nižmego less durable rubble. Surface cover attach the transverse slope of 30%.Covered surface quite quickly wears out and maloustojčivo the motor driving the wheels moving forces from Tangent avggomobmlâ upset connectivity ŝebenok, which pokr′ggme rapidly collapses. To increase connectivity ŝebenok, vodonepronicaemost″ pokr′ptv» m eliminate dustiness, macadam process bitumen and degtevymi materials
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