What are the benefits of paving asphalt? Are there any disadvantages to asphalt pavement?

In the highway pavement that has been built in China, more than 90 are semi-rigid base asphalt pavement.

1. Good flatness, stable and comfortable driving, low noise.

2. The asphalt semi-rigid base has the characteristics of high strength, good stability and high stiffness.

3. The cement road belongs to the rigid ground, there must be joints, the construction is more difficult, and the thermal expansion and contraction are also easy to produce cracks.

4. The asphalt construction is fast and the maintenance is also convenient.

Although the cost of asphalt pavement is higher than that of concrete pavement, asphalt pavement has incomparable advantages in terms of long-term benefits and later maintenance and maintenance.

First of all, the wind noise of the asphalt road is small, which is less wear on the tread of the car, and it is also conducive to improving the grip of the car.

The second is the physical characteristics of asphalt pavement, which is mainly manifested in good toughness, good compressive resistance and tensile property, and can better adapt to the not very stable roadbed.

Thirdly, the later maintenance is simple, and partial reconstruction can be carried out, without large-scale construction like concrete pavement, and the maintenance cost is low, which is a problem that has to be considered for infrastructure construction.

Finally, in terms of environmental protection, although the asphalt pavement will cause certain environmental pollution in the process of paving, the asphalt material can be reused as long as it does not react chemically, which effectively improves the utilization rate of resources.

Asphalt roads have several advantages:

1. Reduce noise, the car runs on it, and the granularity on the surface of the asphalt road can be fully in contact with the wheels to reduce the noise.

2. Clean and beautiful, the asphalt road is black, and the contrast with the buildings and flowers and trees is stronger than that of the cement floor, the flowers appear more red against the black background, the trees appear greener, and the building appears newer.

3. Anti-skid in rainy days, flowing to a low place along the particle void of the asphalt pavement in rainy days, and the pavement is wet but not waterlogged.

The disadvantage is that asphalt pavement absorbs heat compared with cement pavement, and the cost is higher than that of cement pavement.

It turned out to be paved with asphalt.

It is laid by spraying, which has poor permeability and rainy days.

It's slippery, and it will melt when it's hot, and it's sticky all over the car. Concrete roads are expensive to repair, difficult to repair, and slippery on rainy days. Now changed to asphalt pavement.

Highway), is the use of fried mixture (like sugar fried chestnuts with asphalt fried gravel) paved, good permeability, not easy to slip in rainy days, high temperature resistance, hot days will not melt, easy to maintain, with a paver can be paved 12 meters of pavement at a time, easy to mechanize.

Reduce the noise of vehicles and friction!

It can increase the pressure resistance and smoothness of the road surface, and increase the speed of the vehicle!

Easy to repair!

Cheaper than concrete floor Slip reduction

The asphalt road is not slippery and can generate heat.

Exploit Features:

1: Cheap. 2: Excellent elastoplasticity.

Advantages of paving over cement:

1: Cost in the case of heavy usage.

Special low (asphalt is a by-product of ** refining, while cement is specially produced) 2: day and night or summer and winter temperature difference in the area (northern China) is not easy to crack 3: damage can be repaired in a small area.

Benefits of asphalt pavement:

1.The black road surface is non-reflective and prevents car accidents.

2.Reduced tire wear and reduced noise.

3.Absorbs dust and is environmentally friendly.

4.Facilitate construction and open traffic in a timely manner.

5.Easy maintenance.

The advantages of asphalt are as follows:

**Cheaper than other materials;

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Excellent elastoplasticity ;

The earth DAO area (northern China) with a large temperature difference between day and night or summer and winter is not easy to crack;

Damage can be repaired in a small area;

The black road surface is non-reflective and prevents car accidents.

Reduced tire wear and reduced noise.

Absorbs dust and is environmentally friendly. ；

Facilitate construction and open traffic in a timely manner. ；

Easy maintenance.

Bitumen is a complex black-brown mixture of hydrocarbons of different molecular weights and their non-metallic derivatives, which is a kind of high-viscosity organic liquid, which is liquid and has a black surface and is soluble in carbon disulfide. Asphalt is an organic cementitious material that is waterproof, moisture-proof and anti-corrosion. Asphalt can be mainly divided into three types: coal coke asphalt, petroleum asphalt and natural asphalt

Among them, coal coke asphalt is a by-product of coking. Petroleum bitumen is the residue after distillation. Natural bitumen is stored underground, and some form layers or accumulate on the surface of the earth's crust.

Asphalt is mainly used in coatings, plastics, rubber and other industries, as well as paving roads.

Facilitate construction and open traffic in a timely manner.

Asphalt roads and asphalt roads are actually the same. Both are asphalt concrete roads, but with different names.

However, in the past, asphalt roads were extracted from coal or coal tar, and considering that asphalt would be harmful to people, the current asphalt roads were extracted from oil. Although the materials used for paving have been changed, it is still customary to refer to asphalt roads as asphalt roads.

Asphalt is a widely used road pavement, and the main thoroughfares in large cities are currently paved with asphalt.

History

According to archaeological data, the Inca Empire used natural asphalt to build asphalt gravel roads in the 15th century. Between 1832 and 1838, the first section of the coal asphalt gravel road was built in Gloucestershire, using coal pitch.

In 1858, the French built the first gravel road in Paris with natural rock asphalt; By the 20th century, the most widely used paving material was petroleum asphalt.

Qiaoqiao in Shanghai, China, began to pave asphalt in the 1920s. After 1949, with the development of China's self-produced road asphalt material industry, asphalt pavement has been widely used in urban roads and highway trunk lines.

The differences between asphalt and asphalt are as follows:1. Asphalt pavement is the most widely used high-grade pavement in road construction, which can improve the ability to resist road damage caused by driving and natural factors, and has the characteristics of durability. The oil road refers to the pavement structure composed of cement concrete slab as the surface layer, base layer and cushion layer, also known as rigid pavement.

2. The surface layer of the asphalt road is relatively soft and has a certain degree of elasticity, so it will be more comfortable to walk on it, and it has a strong landscape collision. The pavement of asphalt Zhengzhilu Road is stronger, but it is difficult to repair after damage, and it should be noted that most of them are not equipped with steel bars.

3. The disadvantage of asphalt road is that it has poor heat resistance and is easy to deform, but the repair of the road is relatively easy. The cost of asphalt roads is generally higher than that of asphalt roads, so most urban roads are dominated by asphalt roads. The hardness of the asphalt road is high, and you will feel hard when you walk on it, and even a little bump has a strong sense of vibration.

There is no difference, the two are the same thing, only the title is different. Asphalt concrete paved road, or also commonly known as asphalt road or asphalt road, is a widely used road pavement. The materials required for paving road sheds include graded granules, gravel gradation, asphalt cement, bone, stone powder, etc.

The tools required are road graders, excavators, vibratory rollers, trucks, road scrapers, pavers, pressure oil trucks, etc.

Benefits of asphalt pavement:

1. The surface layer is relatively soft, so the car will feel very comfortable walking on the ear cavity and has a certain degree of elasticity. However, the hardness of concrete is high, and the car will feel hard when walking on it, and some small defects on the road surface will give people a relatively strong vibration feeling.

2. Landscape. The asphalt pavement is generally black, giving people a deep and stable feeling, and people will feel more solid when driving. However, the concrete road is gray-white in color, and there is no landscape at all.

Therefore, when designing the main roads and secondary roads of the community or municipal, if you want to go up the grade, you should choose asphalt pavement.

Disadvantages of asphalt pavement:

Asphalt is easy to age, and the dark color of the pavement is easy to chain to absorb heat, and produce a certain degree of dissolution. However, modified asphalt can be used, and these problems can be solved to a certain extent.

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In general, in the paving of asphalt concrete.

The modified emulsified asphalt with a content of 45% to 55% is sprinkled on the cement concrete pavement before, and the bonding of the asphalt concrete and the cement pavement is used to prevent the excessive penetration of the upper and lower layers of water from making the upper and lower layers peel off prematurely, resulting in the displacement and spalling of the asphalt concrete plate.

Non-woven fabrics are mainly pasted with a width of not less than 1 meter (or glass fiber grid) at the transverse joints, longitudinal joints and expansion joints of the original cement pavement to prevent the transverse joints, longitudinal joints and expansion joints of the original cement pavement from being prematurely reflected to the asphalt surface layer and causing premature damage to the pavement. At present, the domestic white and black.

The lower layer of the project (cement pavement and asphalt concrete) generally adopts AC structure.

Fields of application. in civil engineering.

Asphalt is a widely used waterproof material and anti-corrosion material, mainly used in the waterproofing of roofing, ground and underground structures, and the anti-corrosion of wood and steel. Asphalt is also a widely used pavement structure cementing material in road engineering, which can be combined with different composition of mineral materials in proportion to build asphalt pavement of different structures.

Highway is widely used.

The difference between asphalt road and asphalt road is that the material is different, the road surface color is different, the cherry tree is different in durability, and the use environment is different.

1. The materials are different

The pavement material of asphalt road is asphalt processed from petroleum, and the main components are asphalt and mineral oil. The pavement material of asphalt road is asphalt processed from wood, and the main components are resin and wood.

2. The color of the road surface is different

The color of the asphalt road is darker, black or dark gray; The tarmac road is lighter in color, black-brown or gray-green.

3. The durability is different

Asphalt roads are suitable for roads with low to medium traffic, while asphalt roads are suitable for roads and sidewalks with light to medium traffic. In terms of durability, asphalt roads are more durable than asphalt roads and can last for about 20-25 years, while asphalt roads need to be maintained and repaired more frequently.

4. The use environment is different

Because asphalt roads are made of wood, they are easy to be damaged by moisture erosion in a humid environment, while asphalt roads are more adaptable to the environment and are not affected by the climate.

Asphalt pavement structure:

1. The surface layer is a structural layer that directly bears the repeated action of wheel load and the influence of natural factors, and can be composed of 1-3 layers.

2. The base layer is set under the surface layer, and together with the surface layer, the repeated effect of the wheel load is spread to the base layer, cushion layer and soil foundation, which plays the main load-bearing role. The strength index of the base material should have higher requirements. Depending on the level of the highway or the amount of traffic, one or two floors can be set up at the base level.

3. The subbase layer is set under the base layer, and bears the wheel load repeatedly with the surface layer and the base layer, and plays a secondary load-bearing role. The strength index requirements of the subbase material can be slightly lower than that of the base material.

4. The cushion layer is a structural layer set between the subbase and the soil foundation, which plays the role of drainage, water separation, anti-freezing, anti-fouling, etc.

The above content reference: Encyclopedia - asphalt pavement.

The above content reference: Encyclopedia - asphalt pavement.

There are drawbacks. 1. Easy to slip: the surface of the asphalt pavement is rough, the asphalt viscosity on the surface is low, and it is easy to slip and fall accidents;

2. Poor durability: the durability of the asphalt wheel road surface is poor, and it is easy to produce cracks and hollow drums in high temperature and corrosive environments;

3. Poor compressive resistance: the asphalt pavement has poor compressive resistance, and it is easy to be damaged by the pressure of heavy vehicles such as cars and trucks;

4. Vulnerable to external influences: asphalt pavement is easily affected by external factors, such as temperature, humidity, air pressure, solar radiation, etc.;

5. Vulnerable to pollution: Asphalt pavement is susceptible to pollution by automobile exhaust, sewage, dust, etc., and Wang Shen affects the appearance of the pavement.

The advantages are: smooth surface, no joints, comfortable driving, low vibration, low noise, wear-resistant, dust-free and easy to clean, short rough construction period, simple and recyclable maintenance, suitable for phased construction, etc.

The disadvantages are: poor temperature stability of asphalt materials, easy to brittle in winter, easy to soften in summer; If it is not well controlled, the road surface will be soft, oily or sheared, and the emulsion will be damaged by shear cracking. At low temperatures, the asphalt material becomes brittle, which may cause cracking of the pavement plate.

The compacted mixture has large porosity, poor water resistance, and is prone to water damage due to large mu. Asphalt is a polymer material, with poor aging resistance and durability that is not easy to guarantee; The flatness is poorly retained, not only the flatness deteriorates due to settlement, but also the material is easy to form ruts when it softens.

Shanghai Liling Municipal Engineering is a professional asphalt pavement construction, and related questions can be consulted and answered.