Porous Concrete Sound-absorbing Board with High Sound Absorption Performance Developed in Japan

< P > < FONT face = Verdana > Three Japanese companies, Kumagai Group, GAEart Kumagai and GEOSTR, have jointly developed a road sound barrier with high sound absorption performance.

< P > < FONT face = Verdana > According to the spot check of the Ministry of Environment of Japan, only 37.8% of the 3380 places randomly selected along the main roads in Japan meet the environmental standards day and night. As a solution to road noise, sound insulation walls are generally set up. However, due to the problems of the surrounding environment, there are many places where it is impossible to set up high sound insulation walls. In order to solve this problem, the three companies have integrated the new porous concrete sound-absorbing board and concrete fence, so that the middle partition has a sound-absorbing effect.

< P > < FONT face = Verdana > This porous concrete panel has a sound absorption rate of 0.90 at 800 Hz and 0.95 at 1000 Hz, giving strong sound absorption in frequency bands where road traffic noise is particularly severe. In addition, it can withstand high-speed collisions of more than 100 km/H, so it can also be used as a road fence. Photocatalyst coating treatment is carried out on the surface to prevent pollution. At present, it has been confirmed that the photocatalyst coating treatment will not cause any impact on the sound absorption rate.

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