Chernigov: thickness of the base under the asphalt at the intersection of Mira Ave. and St. Cossack 65 cm
In Chernihiv repairs are completed at the intersection of prospect Mira and streets Cossack. Already placed the final layer of asphalt; the amount of work remaining, minimum. These photos of the intersection taken in the morning: What is the basis under the asphalt at this intersection? As previously reported, on may 25 the Executive Committee of the Chernihiv city Council extended the closures on this section of the city until June 15 to ensure high quality of repairs and compliance in processes of bonding and hardening components in the device top layer of the base. At this meeting, Chernihiv mayor Vladislav Atroshenko commented on this: "We're going to additional costs in order to provide the technology and the framework was already petrified. Other variants, except how to make the basis of such, no. After this intersection there is a heavy traffic of huge tonnage. At a temperature of +30 +35 degrees, the asphalt heats up and when braking and the beginning of the movement of such vehicles asphalt pavement gradually shifted, there are rut and nodules. Layer the bottom of the base (cushion) of the road surface, which is now supposed to resist that new asphalt coating prolegala without comment any longer." The reasons that forced the replacement of the top layer of the base and laying of new layer of Foundation in this area, the press service of the city Council said the Chairman of the Board of SBU-14 Alexander Kharchuk. The conversation took place a week ago last Friday. Photos taken at the same time: What factors influenced the replacement of the old base layer? The old road was built by the then Soviet technology. When you build this road, the axle load was calculated for the ZIL 6 tons. the car Park has changed, there are many other trucks. Now the axle load 12-14 tons. For example, the weight of a trolley, even without passengers - 10 tons. The materials that were used at the time, they do not answer chromo load. When we did sometimes cutting the cores, we saw that the Foundation of gravel was 10 cm, and where there was not, that is, the asphalt pavement was just laid on the sand. In those places where the Foundation was gravel and sand already mixed up among themselves, and that this layer of Foundation has also lost its bearing ability. If we just put new asphalt on the old basis, it soon appeared nodules, rut, crack, and then yamochnost. Therefore, to make a new cover on the old basis was meaningless. What is the new layer of Foundation and all shagov actions? - We are already close to European standards, the thickness of the layer of the base here - see 65 Foundation consists of: 1. 20 cm of sand underlying layer, it is drained. 2. On top of this sand across the width of the laid geotextile material, which is heat treated. Its purpose is to prevent mixing of gravel with sand, increase the elasticity, prevent the formation of ruts in the bottom layer of the framework and the ingress of water from the lower sand layer upwards. 3. 16 cm - gravel mixture. Then all these layers are going. 5. 16 cm crushed stone aggregates treated with cement. The result is niskakoski concrete, you need only be. If vysokomolochnye concrete, it will not work with the asphalt together. They have different coefficients of expansion. 6. Fit reinforced geotextiles (mesh), which gives more elasticity. 7. 8 cm coarse asphalt concrete class A. 8. 5 cm - mladinesti asphalt concrete class B. Concrete slabs are placed for the best overlap of Sewerage networks and communications. The press service of the Chernihiv city CouncilÏåðåâåäåíî ñåðâèñîì "ßíäåêñ.Ïåðåâîä÷èê": translate.yandex.ru.
Source: http://uzinform.com.ua/
