With the construction of machinery and equipment failure to pay more and more attention, the current number of enterprises in the construction of highway engineering management have made corresponding changes in the correct use of machinery and scientific maintenance of the same important principles of effective management, Change the previous construction of heavy use, light maintenance of the traditional thinking, this will help to find those problems that are easily overlooked. Heavy use,…

The combination principle is: at least one layer of asphalt surface layer is a type of dense gradation asphalt concrete to prevent water infiltration. If the upper layer using Ⅱ type asphalt concrete, the surface layer shall be used Ⅰ type asphalt concrete, AM type open graded asphalt gravel should not be for the surface layer, can only do link layer.[url=http://doublesteelroller.com]Double Steel Roller - Road Machinery Equipment Manufacturers - Doan Machinery[/url]

SMA structure can be…

Nowadays, people's environmental protection viewpoint is more and more strong, all kinds of re-use products are gradually into the homes of ordinary people. Wood-plastic board as the re-use of wood is also gradually popular in the market. This use of abandoned wood to reproduce the production of the product not only has a ring of healthy green wood, but also has a special deformation is not easy to crack and so on. In addition to the rapid development in the furniture industry, the…

Construction process of the basic process

Before the start of each class, the mixer and feeding equipment to check and test operation; the use of measuring instruments to check and set pounds; proofing construction mix ratio: the raw materials used in the specifications, variety, origin, grade and quality inspection, and And check the construction with the ratio; the sand, stone moisture content to check, if any change, promptly notify the pilot to adjust the water consumption. All…

The right front view provides the best front view, providing the best view of the outer edge of the drum, an ergonomic driver platform, a modern dashboard, low machine height, 3-way travel with the highest driving comfort Hinged joint, center suspension point, clean edge setting - single-side hub suspension, fixed rudge offset 56 mm, low working platform, high overturning stability Model Maximum working width HD8VV 856 mm.[url=http://smallroadroller.com]Small Road Roller - Shanghai Doan…

Requirement: From the perspective of preventive maintenance of asphalt pavement, simultaneous crushed-rock seal technology does not impose higher requirements on construction conditions compared with other technologies, but in order to improve the maintenance performance, this new Technology advantage, or need to have certain conditions. First of all, the road surface damage should be diagnosed, to clear the key issues to be repaired; full consideration of asphalt binder and aggregate…

The use of mechanical force to soil, gravel and other fillers compact earthmoving machinery. Widely used in foundations, roads, airports, dams and other projects.

Compaction machinery according to the working principle is divided into: static rolling type, to replace the static roller compactor trend. Impact type, vibration type and compound action type.[url=http://smallroadroller.com]Small Road Roller - Shanghai Doan Machinery Technology Co.,Ltd[/url]

Static compaction…

Paver paving speed instability, is the main factor affecting the pavement smoothness. The main reasons for instability are:

Engine speed change.

The change of volume ratio of hydraulic components.

The Change of Slip Rate.

These three aspects are associated with sudden changes in load during the paving operation. The constant speed of the paver can not be achieved only by controlling the throttle of the engine or by manually controlling the variable displacement pump (the…

Asphalt pavement in the traffic load and the impact of climate, with the passage of time, road conditions and service capacity will gradually deteriorate, in order to prevent the early destruction of pavement, extend the service life of the pavement, Kongtong segment using asphalt gravel synchronous sealing technology Preventive maintenance of highway pavement. The technology is synchronized in the same second sprinkling asphalt and spreading aggregate, so that between them with the largest…

According to the design width, paving technology and paving quality of the road, the maximum paving width, the maximum paving thickness, the paving speed, the paver productivity (t / h), the paving width Shop forming accuracy and paving quality. The main parameters and basic parameters of the asphalt concrete paver are fully considered to meet the requirements of the engineering design and the construction quality is ensured and the productivity (t / h) of the asphalt concrete mixing…

Grade 2 and below and the laying of low-grade road in the steep hillside section of the construction of particularly difficult or a large number of blasting to move digging for filling, can be used to fill the way to fill, but the road bed is not less than 1.0m range Should be layered filling compaction. Gravel embankment of expressways, first-class highways and other grade roads with high-grade pavement shall be filled with layers, and shall be stratified and compaction. The thickness of…

Mix Design of Recycled Asphalt Mixture

The mixing ratio of hot mix plant was designed by Marshall method through three stages: target mix design, production mix design and production mix verification. Through the above three stages to determine the recovery of asphalt pavement materials (RAP) blending ratio, the variety of new materials and ratio, aggregate gradation and the best amount of asphalt. In this case,[url=http://smallroadroller.com/]Small Road Roller - Shanghai Doan Machinery…

Management of daily, maintenance of regular

In the establishment of the mechanism, based on the maintenance of the content and standards dissolved into the equipment management activities to make the maintenance and maintenance work done a qualitative, substantial, tangible and effective development, so that equipment maintenance work frequently .

To carry out the form of responsibility area "charter group activities." According to the production positions and maintenance personnel…

At present, there are two kinds of common gravel spreader: one is with a distributor plate, spreader of the distributor (Figure 1), the silo in the hopper drum rotating force driven into the sub-material In the plate 2, the stone is subjected to the resistance of the slanting partition plate of the distributing plate 2 so as to be moved to the both sides at the same time of falling and reach the purpose of increasing the width of the spreading, and striking the spreading plate 3 to make the…

Asphalt pavement is one of the main structural forms of high-grade highway in China. As a new technology of asphalt pavement, double paving technology is popularized in construction, which can shorten the construction time and improve the working efficiency. In this paper, the basic principles, key technical characteristics and application of asphalt pavement pavement are analyzed, respectively. The purpose of this paper is to provide technical guidance for application of double paving…

In this paper, a brief introduction construction principle micro-surfacing and slurry seal construction technology, construction and technical characteristics applicable to the construction area. Slurry seal and micro-surfacing, which greatly increases the speed of construction compared to other construction methods of its construction speed, energy use, the higher its energy-efficiency and greatly improve the overall effective construction.[url=http://wpcgreenfloor.com/index.html]Seven…

How to properly store firearms Roller: Rollers how proper storage is mechanical roller mechanical operator should have the knowledge. In particular, many mechanical roller may not be used again for a long time, or after a project is finished, you need these machinery and equipment stored for long periods. This time need mechanical roller how to correct long-term storage has become an important question, how long ...

Small mechanical roller proper…

Reasonable choice of road construction equipment and match. Road Construction subgrade, road and bridge engineering construction engineering etc basis having used sequentially corresponding construction machinery to complete. And the kind of road construction machinery, models, specifications many, each with its own technical performance and operating range. In order to ensure the quality of road construction, time and shelf life to complete the task, get the best economic and social…

Asphalt concrete pavement milling performed using milling machine. Before construction to determine the scope of the request of the milling, milling in the field release sample line. At one end section of the milling required sequential milling, milling try once completed, except for special reasons, can not be an intermediate pause. Mechanical milling of waste centralized transportation of waste to the designated place, followed by artificial loaders asphalt debris cleanup, and trimmed…

In modern road traffic, more than 90 per cent of road asphalt pavement, road transport bear about 80%, so the quality of asphalt pavement directly affect the effectiveness of transport. According to statistics, China's current road system around 18000 Road conservation classes, often on the road conservation and restoration. In road maintenance work, the need to dig for damaged parts cut its workload accounted for more than half of the entire repair workload. Before the 1980s, such work is…