Tag Archives: road maintenance

Equipment For Road Maintenance and Repairs

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The following is the list of the units, used to maintain and repair roads:

(1)    recyclers for asphalt concrete;

(2)     asphalt cold milling machines;

(3)     snow ploughs;

(4)    joint filling machines;

(5)     bush cutters;

(6)    sand-spreading machines; and

(7)     bitumen emulsion units;

The recyclers for asphalt concrete are meant for repairing potholes on roads made of mastic asphalt.  Additionally, the recyclers may be used to produce asphalt concrete and mixtures based on concrete or used to transport hot bitumen.

The asphalt cold milling machines reclaim asphalt pavement.  That means they remove the parts of the surface of the paved area to fill them with the new cement or asphalt concrete.

The snow plough is considered to be one of the most effective machines to clear the roads of snow and remove the snow accumulations along the roads.  Some designs of snow ploughs allow for loading snow into carrier vehicles.

The joint filling machines automatically apply the tack coat prior to the asphalt laying.

Sand-spreading machines are units that are mounted on tractors to spread bulky materials such as salt and sand.  These machines are applied to improve road safety during snow and ice storms.  The grass on the shoulders of roads or trees with a thickness of more than 80-100 mm may be cut by the special machines called “bush cutters.”

There are two types of equipment for bitumen emulsion production:

(1)    The GlobeCore UVB-1 line of units are designed for cationic and anionic bitumen emulsion production.  This construction material has gained a great popularity in the road construction industry and is used to construct and repair roads, waterproof  roofs, and eliminate dust on the pit roads.

(2)    The GlobeCore UVB-2 units are used for the modificartion of polymer bitumen.  The application of polymers for bitumen modification makes it possible to meet the needs of the road construction industry and improve every aspect of new road pavement.

Modified bitumen is widely applied when producing asphalt concrete with improved properties to increase the durability and rutting resistance of the road surface. Both bitumen emulsion units UVB-1 and UVB-2, are produced under the GlobeCore trademark.

Bitumen Modification as a Way to Extend the Period Between Road Repairs

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Today, asphalt and concrete has been widely applied when paving roads and highways.  Recently, there have appeared a great number of potholes because of the increased number of heavy load-carrying vehicles.  Unfortunately, potholes occur all year round, but more intensively in spring.

In practical terms, road pavement failures are mainly treated in a frost-free season.  Delayed pothole treatment can result in the intensification of the road failure process: not only asphalt and concrete layers, but also pavement layers are destroyed.

All this has a negative impact on the service life of the road pavement and road traffic safety.  It is very troublesome to perform road construction works at low temperature since the road construction materials are characterized by poor adhesion to the road surface.  In such a way, application of cold asphalt concrete and emulsion mixtures will not be efficient when repairing road surfaces.

The statistics show that when applying the technologies described above, the road pavement will need repairing in a year because of the destruction in the junction of the road surface and road patch or defects of the road construction materials.

Cold asphalt concrete mixtures distinguish themselves through the following advantages:

(1)    Long-term storage;

(2)    Long-distance transportation; and

(3)    Road construction projects performed at low temperatures.

Due to the above listed characteristics, this construction material has gained a widespread acceptance in the road construction industry.  Many specialists agree on the point that modified asphalt concrete is a good alternative to hot or mastic asphalt.  Cold asphalt concrete mixtures haven’t enjoyed a wide popularity because of their poor physic and chemical performance characteristics.  High quality and timely repairs and long service life of road surfaces requires operation with liquid bitumen that most corresponds to the current conditions of roadway usage.  Such substances may be obtained by modifying bitumen by adding special substances that improve the durability and other characteristics of cold asphalt concrete.

Technically, bitumen can be effectively modified by the GlobeCore UBV-2 units.

This equipment includes:

(1)    two reactors;

(2)     colloid mill;

(3)     oil heating and bitumen supply blocks;

(4)     cabinet with a control panel;

(5)     polymer supply block;

(6)     controllable bitumen valves; heating system;

(7)     adhesive additive supply block;

(8)    plasticizer supply block; and

(9)    a platform to load polymer.

The UVB-2 modified bitumen units can be serviced either outside or inside an enclosed building with a balanced system of ventilation.

GlobeCore equipment provides for production of modified bitumen and polymer-bitumen binders that improve the quality of road construction projects and extend the period between road repairs.