RU2301292C1 - Method for reinforcement of road pavement - Google Patents

Abstract

FIELD: road repair works used for reinforcement of non-rigid type road pavement and simultaneously for leveling said pavement.

SUBSTANCE: method involves providing hot regeneration process by heating top layer of existing asphalt-concrete pavement through 3-5 cm depth; mellowing said layer by cutting; introducing into ground heated material novel mixture of porous or high-porous asphalt-concrete in an amount needed for leveling and reinforcing; mixing said components; distributing mixture; applying thereon novel mixture for high-density or dense asphalt-concrete in 2-5 cm thick layer; providing joint compaction of both layers.

EFFECT: improved quality of reinforced and leveled road pavement.

2 cl, 1 ex

Description

The present invention relates to road repair work and can be used to reinforce non-rigid pavement with simultaneous alignment.

The traditional way of reinforcing non-rigid pavements involves laying a leveling layer and reinforcement layer (s) [1]. The disadvantage of this method is the high cost of work.

There is a method of reinforcing pavement by hot regeneration of the top layer of asphalt concrete pavement, which consists in heating it to a depth of 3-5 cm, loosening by milling, introducing additives into the ground preheated material, mixing the components, distributing the mixture, applying a new mixture layer to it and co-sealing both layers [2]. This method is the closest to the proposed technical solution and the achieved result.

A machine that allows this method to be implemented can work only in two modes: apply a new mixture to the mixer to mix it with the old ground material (thermal mixing method) or apply a new mixture to the layer surface from the old ground material (heat-setting method). In both modes, part of the new mixture is automatically spent on leveling the coating.

For alignment with the traditional repair method, less expensive mixtures for porous and highly porous asphalt concrete are usually used, and during hot regeneration, they are forced to use more expensive mixtures for high-density or dense asphalt, from which a closing layer is usually arranged.

The purpose of the invention is to reduce material costs.

This goal is achieved by the fact that the coating is heated to a depth of 3-5 cm, loosened by milling, a new mixture for porous or highly porous asphalt concrete is introduced into the crushed heated material in the amount necessary for leveling and strengthening, components are mixed, the mixture is distributed, a new mixture is applied to it for high-density or dense asphalt concrete with a layer of 2-5 cm and both layers are compacted together.

Example. The existing pavement was heated to a depth of 4 cm using asphalt heaters, loosened with a milled drum of a heat mixer (remixer), a new mixture for porous asphalt concrete was added to the mixer of the mixer in the amount of 200 kg per m ² for leveling and strengthening, laid with a heat mixer in the form of a loose layer, onto the paved layer with a paver, a new mixture for dense asphalt concrete with a layer 3 cm thick and both layers were compacted with rollers. As a result, we obtained a new aligned monolithic layer 9 cm thick, consisting of a layer of porous asphalt concrete in the lower part of 6 cm (reinforcement layer) and a dense asphalt concrete layer in the upper part of 3 cm (trailing layer). 50 kg per m ^{2 of a} new mixture for porous asphalt was used to level the old pavement. The economic effect was the difference in the cost of dense and porous asphalt concrete.

Information sources

1. Technical rules for the repair and maintenance of roads: VSN 24-88 / Minavtodor RSFSR. - M.: Transport, 1989 .-- 196 p.

2. Thermal cycling. Recommendations for use / Firm "Wirtgen". - Windhagen, 1993 .-- 83 p.

Claims (1)

The method of reinforcing pavement by hot regeneration, which consists in heating the top layer of the existing asphalt concrete pavement to a depth of 3-5 cm, loosening it by milling, introducing additives into the ground preheated material, mixing the components, distributing the mixture, applying a new mixture layer on it and jointly compacting both layers, characterized in that a new mixture for porous or highly porous asphalt concrete is introduced into the crushed heated material in an amount necessary for leveling and strengthening and a new mixture is applied to the distributed mixture for high-density or dense asphalt concrete with a layer of 2-5 cm.