Paver – road construction equipment intended for distribution and pre-compaction (installation) asphalt concrete mixes for road bases and pavements.
Paver – road construction equipment intended for distribution and pre-compaction (installation) of asphalt mixes at the device of road bases and coverings.
Paver is one of the types of road construction equipment. The advantage of this machine is the high speed of execution of road construction works, which is directly reflected in the cost of road construction. It is also noted and the quality of the road coating , it meets the highest standards, because it is a durable, smooth, the same width and thickness of the coating.
Paveras construction equipment is characterized by high structural complexity, which is divided into two components:
– working part that combines self-propelled chassis and cab;
– the unit of work (linear machine).
The main purpose of the linear machine – layered asphalt coating, comprising:
– distribution of the mixture.
– pre-seal at the lower layers.
Achieved these goals through the combined efforts of both the paverand the additional equipment: trucks, dump trucks, rollers. The first (trucks and dumpers) put the car asphalt coatingrollers of the same mix and tamped level of a road cloth.
The work of paver consists in performing several consecutive operations:
– reception in the corresponding hopper is supplied trucks and dump trucks of asphalt concrete mix, heated to the required temperature;
– the moving masses (of asphalt) to the screw chamber. This is possible thanks to the feeders – special mechanical devices;
– place the mixture on the surface of the substrate with subsequent uniform distribution. The job screws work is carried out according to the parameters specified width;
– preliminary alignment of the cover and its seal. The task is performed using a special block, comprising: smoothing plate, the tamper bar bars, vibrators.
The functioning of a modern paver is secured and controlled by the latest type of electronic systems. They allow to fully automate all running machine workflows. In addition, the equipment is equipped with various sensors that monitor and regulate:
– flow asfaltobetonnogo coating on the auger;
– the angle of the levelling plates on the horizon;
– the line thickness of the stacked layer of the stated parameters.
Actuation of the linear road-construction equipment by the operator. His workplace is on a specially equipped site of the machine and may be covered by an awning for protection from the sun or adverse weather events. A more comfortable option – equipped cabin. Note that before starting work on the paver operator must pass the required qualifying training.
Road construction machinery for road construction has a wide variety. So, this equipment klassificeret on several parameters.
The pavers on the paving width:
The criterion allows to establish the use of equipment and the timing of the execution of planned works for the construction of a road cloth. Option includes 5 types:
– Type I – small width of laying from 1 to 3 m. This is one of the smallest compact cars, used for the construction or reconstruction of the narrow sections of roads: sidewalks, paths for pedestrians and cyclists lanes widening;
– Type II – wide styling from 2 to 4.5 m. the Most popular type of technology because ideal for work on roadways, where there is no possibility even for a short time completely block the traffic. Width allows repair strips of the standard size – 3,0-3,75 m;
– Type III – with the width of the packing from 2.5 to 7.5 m. special Equipment that allows you to put road clothing immediately to two lanes or to carry out reconstruction or construction of road section, width to 6.0-7.5 m. the Advantage of this type of technology is the lack of longitudinal cold joint in the middle of the canvas;
– Type IV – with the width of styling from 3 to 9 m. This kind of construction machinery used at works on motorways with 4 lanes, 2 each way. A wide grip allows you to get high-quality, smooth and seamless coverage of the entire two-lane roadway;
– V type with a width of stacking from 3 to 12 m. This technique is suitable for repair and reconstruction of road works on motorways with more than two lanes for traffic in one direction has lateral fastening line. The advantages of these pavers are considered to be high performance and large size, allowing to carry out such work.
The pavers according to the type of the chassis:
This indicator refers to the key when selecting the paver, because it depends on the possibility of construction works on the difficult road sections, the volume and timing of their implementation, as well as the possibility of operation of equipment under certain conditions. Pavers for a given parameter are divided into:
– crawler pavers;
– wheeled pavers.
Crawler mounting is characterized by the highest performance and efficiency. The use of this type of technology relevant to the objects, wherein a large area, and therefore assumes a smooth and durable coating of large areas: interurban tracks, airports and so on. Usually, it’s the pavers with a wide grip (from 3 metres), allowing to obtain a wide, seamless band.
Machines of this type can have a different number of supports 2 or 4. Some of them may be present Truckee special type – steel, equipped with rubber pads or full rubber. The use of this soft material can almost completely eliminate damage to the new roads in process of construction or reconstruction, and also increases the adhesion of construction machinery and its Foundation. The advantages of rubber tracks include increased movement speed and soft ride.
Performance of wheeled vehicles is several times lower crawler, because it involves a narrow grip (often from 1 to 2.5 m) and not intended for construction and upgrading of two lane road at the same time. However, it is indispensable for the arrangement of narrow areas, territories with a small area and roads that require asphalt coating of small height. To meet this type of equipment on city streets, in yards and yards driveways on township roads. Wheel type equipment is highly maneuverable and allows you to develop a high speed (if necessary, exceeding 20 km/h), regardless of the conditions.
There are several new types of wheel asfaltobetonov depending on modifications chassis. So, some models have different number of axles chassis from two to four, and the first (one or two, respectively) are leading.
Pavers for performance:
This key figure takes into account the technical characteristics of construction machinery, such as: the type of chassis and power of the engine, size and weight of the car, etc. The parameter determines the type of paver for carrying out certain works in certain road conditions. Cars share on:
– mini-pavers. The representatives of this type have small dimensions, which affects their maneuverability and speed of assigned tasks. The main purpose of repair and construction of small area sections of roads, generally within the city. The weight rarely exceeds 6 tons, and the main performance parameters provide an opportunity to lay asphalt coating at a rate of about 250 tons per hour. Width styling small fits size from 1 to 3.5 meters;
– pavers of the middle class. The most popular type of technology because it allows to solve the most wide range of tasks, which makes it universal: it is possible to perform different types of repair and construction, application in all road conditions. The weight of the machine of this class ranges from 6 to 10 tons, and the bigger it is, the higher its capacity – a single machine can put up to 700 tonnes of coating per hour. The width of the stacked canvas depends on the chosen model, on average it is 5 meters;
– heavy pavers. This type of equipment is characterized by large dimensions and high productivity of work performed, capable of implementing the most complex production tasks in any environment. Typically used for coating cloth for large areas or long distances. Machine weight exceeds 10 tons, which has a direct impact on his performance – he is able to lay up to 950 tons of mixture per hour. The width of stacking up to 12 meters, which corresponds to three lanes of traffic.
Among a variety of pavers to determine the choice of technology is quite difficult. It is influenced by not only the basic parameters, but the standard exterior features, the novelty of the model. First, however, should be guided by the planning and economic calculations, based on the type and volume of work performed, their timing conditions. Calculations must consider:
the width and thickness of the stacked layer;
– the execution speed of the work machine;
– reception of a mixture of equipment (bunker, besanceney);
– hopper volume (if any);
– power of engine, machine and speed of its movement;
of the heated pressing plates (gas, electric);
– the weight of the machine its dimensions.
The evaluation of these indicators will allow to choose the optimal type of paver and to carry out construction and repair works with the highest profitability.
The main parameters of the quality of the paver include the following indicators:
– the type of paver;
– maximum width of the stacked coating;
– method of adjustment of the width of the sealing of the working body;
– the adjustment range of the width of the sealing body;
– the thickness of the stacked layer;
– working speed minimum and maximum;
– the maximum transport speed;
– weight of the paver is operating;
– the characteristics of sealing of the working bodies and range management;
– complete 80% of the resource;
– the average operational complexity of every shift maintenance;
– climatic version of the paver and category of accommodation;
– the sound level at the operator’s workplace;
– parameters of vibration on the workplace and the management bodies;
– the opacity of exhaust gases of the engineof the paver;
– emissions of harmful substances with exhaust gases from the exhaust system of the engineof the paver.
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