What is the reason for the road sound barrier preference for PC endurance boards?
ShanDong DeXiang International Trade Co.,Ltd , https://www.dexiangchemical.com
August 13 09:04:30, 2022
The shape design of the road sound barrier generally meets two requirements, strong windproof effect and aesthetic effect.
1. To ensure the beautiful appearance of the sound barrier, the sound barrier is generally installed in a public place, and it must be achieved with certain aesthetics, and the city can not be destroyed.
2, to achieve better wind and dust suppression effect.
So what materials are commonly used in highway sound barriers? Today, Anping Hengai will introduce the superior performance of the PC board.
First, the mechanical function of the special PC board for road sound barrier
1. Impact strength: PC endurance board has good impact resistance. It is 250 times higher than traditional glass and 30 times higher than Biaco sheet. The impact strength of the PC endurance board is called "the bright steel plate".
2, tensile strength is good, PC endurance board heat resistance is good, even at 120 ° C, its tensile strength can still reach 350kgf / cm2.
3, roundabout strength: PC endurance board excellent bending resistance, even if the back view point reaches 90 °, still does not crack.
4. Anti-tiredness and creep resistance: The creep resistance of PC endurance board is very good in thermoplastic plastics. Its creep is small even at high temperatures.
Second, the thermal function of the PC board for road sound barrier
1. Melting temperature: The temperature of the PC endurance board is 135 °C, and its continuous application temperature is 120 °C.
2. Linear shrinkage coefficient: The linear shrinkage coefficient is 7×10-5cm/cm/°C, which is relatively small in plastics.
3, embrittlement temperature: PC endurance board embrittlement temperature is -40 ° C, continuous use temperature is -30 ° C, is usually incomparable plastic.
4, extinction: PC endurance board is one of the flame retardant self-extinguishing plastic, it will not attack toxic gas when heated at high temperature.
5. Thermal conductivity: The thermal conductivity of PC endurance board is not much different from that of ordinary plastic. It is 1/4 of glass, 1/300 of iron, 1/1000 of aluminum, and 1/2000 of copper. It is an excellent material for heat preservation. one.
Third, the optical function of the special PC board for road sound barrier
1. Transmittance: The transmittance of the PC endurance board is between 85% and 90% equivalent to that of glass.
2, weather resistance: usually PC endurance sheet exposed to the outside for a long time, exposed to ultraviolet light is easy to cause yellowing and surface degradation. The high-end PC endurance board is equipped with a layer of anti-UV layer. Even if it is exposed for a long time, its optical and mechanical functions are not significantly changed.
4. Chemical resistance of PC board for road sound barrier
Polycarbonate has excellent resistance to weak acids, weak bases and alcohols at room temperature, but it is less effective against strong acids, bases, benzenes, chlorinated hydrocarbons and esters, and is particularly prone to dissolution, swelling or differentiation. Representation. Due to its chemical resistance and temperature irregularities, internal residual stress and length of exposure, special attention should be paid before use.
5. The weight of the special PC board for road sound barrier is light.
Under the same thickness and area, the PC endurance board weighs only half of the glass, so it can save a lot of difficulty in transfer and sound barrier construction.
6. Sound insulation function of special PC board for road sound barrier
The sound-insulating effect of PC endurance board is 3-4DB higher than that of glass. The preferred material for sound-insulating materials for noise barriers, PC endurance board has been widely used in highway sound barriers, viaduct sound barriers, fast road sound barriers, railway sound barriers, rail transit Sound barriers, high-speed rail sound barriers, residential noise barriers and other sound barrier projects.