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Crushed stone covering
crushed stone, as well as gravel, arrange on the road IV and V categories with little traffic (up to 200 vehicles per day) for the device used iskussgvenno crushed stone crushed stone material, usually limestone, having a compressive strength of 600 kgf not iizhe / cm 2. For the lower and middle layers of crushed stone bases and covers used fractional rubble of size 40-70 and 70-120 mm; for the upper layers, bases and covers 40-70 mm; Wedging-5-10,10-20 and 20-40 mm. Crushed soft rock used is larger than 70 mm. crushed stone suit on a sandy sloeDlya the underlying bases can be used mesngnye other materials (shlak.rakushka.gravy). Principle of macadam is sleduyuschem.Scheben grain size of 40 mm or more scattered on a prepared base are aligned for a given profile and pre-Rollers schebenok to immobility. Wedging then sequentially scatter smaller stone rubble material- coarseness of 10-20 mm and 5-10 mm.Ukatkoy reach full wedge rolling of rubble schebenok.Pri watered, which facilitates mobility schebenok during ukadki and contributes to better shape and tsemetatsii pokrygiya. Crushed stone Floor Pan sections arrange in a single layer thickness of 10-18 cm, and with a thickness of more than 18 cm in two layers using Object picture click sloya.Dlya less durable rubble. Surface coatings impart transverse slope of 30%. macadam pretty quickly wear out and are unstable when the car driving tangential forces from the wheels moving avggomobmlya upset schebenok connectivity, resulting in pokrggme quickly razrushaetsya.Chtoby improve connectivity schebenok, vodonepronitsaemost pokrptv "m eliminate pylimost, rubble treated bitumen and tarry material
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