What are the special requirements for the top of the road noise barrier?

When constructing a highway noise barrier, it should cooperate closely with other professions. The construction organization should fully consider the interface and process requirements related to the main works such as bridges and roadbeds. When the length of sound barrier of the road barrier is greater than 500m, a safety gate shall be installed every 500m; the safety gate shall be opened from the inside to the outside of the line, and the width shall be 2.0m; when the hole is placed in the sound barrier, the distance from the culvert center or pedestal to the two sides shall be get on.
Composite sound-absorbing panels shall provide the factory inspection report and product certification for this batch. The color of the outer brush coating of the road noise barrier is forbidden to have a similar color to the driving signal, and is finally selected by the construction unit according to the principle of unified across the board.
The prefabricated part of the road noise barrier needs to be processed in advance. The H-beam post and bottom plate, the reinforcing steel plate and the stiffening plate should be welded firmly. The weld height should not be less than 9mm, and the weld grade must be one grade. All drilling and antisepsis must be in the factory. Completed in-house, may not be carried out on site so as not to damage the corrosion resistance of the steel structure.
However, at the same time when we purchase sound barriers, we will choose sound barriers according to different geographical locations and places of application. Here we take a look at the top design requirements for road sound barriers.
The cylindrical sound absorber added on the top of the road noise barrier can increase the insertion loss of the sound barrier and increase with the diameter of the sound absorber. When the diameter is 0.5m, the insertion loss calculated at the receiving points 1 and 2 is increased by 1.80dB and 1.94dB, respectively; when the diameter of the absorbing body is increased to 1m, the insertion loss calculated at the receiving points 1 and 2 is increased by 4.10dB and 4.09dB, respectively. . The larger the diameter of the sound absorber at the top end of the sound barrier, the greater the increase in insertion loss, but the excessive diameter will make the person feel top-heavy. The diameter of the absorber is 0.5m in the actual project, which can not only increase the insertion loss, but also have better visual effect.
Road noise barriers are mainly used for noise control along highways, expressways, rails, and frontage neighborhoods, as well as the comprehensive management of noise in industrial plant areas and large electromechanical equipment.

Paraffin Wax

According to the degree of processing and refining, it can be divided into three types: fully refined paraffin, semi-refined paraffin and crude paraffin.

Crude paraffin wax has a higher oil content and is mainly used for making matches, fiberboard, tarpaulin, etc. Fully refined paraffin and semi-refined paraffin are widely used, mainly used as components and packaging materials for food, oral medicine and certain commodities (such as wax paper, crayons, candles, carbon paper), coating materials for baking containers, used for fruit preservation , Insulation of electrical components, improve rubber aging resistance and increase flexibility, etc.

Paraffin wax is a mixture of hydrocarbons extracted from certain distillates of petroleum, shale oil or other bituminous mineral oils. The main component is solid alkanes, odorless and tasteless, and white or light yellow translucent solids. Paraffin wax is non-crystalline, but has a clear crystal structure. There is also artificial paraffin.
Paraffin wax is a kind of petroleum processing product, a kind of mineral wax, and a kind of petroleum wax. It is a flake or needle-shaped crystal obtained by solvent refining, solvent dewaxing, or freezing crystallization of wax, pressing and dewaxing of lubricating oil fraction obtained from crude oil distillation, and then solvent deoiling and refining. Used to make higher fatty acids, higher alcohols, matches, candles, waterproofing agents, ointments, electrical insulating materials, etc.

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