NOISE BARRIER

摘要

PURPOSE: A soundproof wall is provided to drastically improve soundproof effects by improving sound insulation and absorption functions. CONSTITUTION: A soundproof wall(1) comprises a sound insulation layer(11), in which a thickness is 1.2 times of a thickness of a sound absorption layer(12). The sound absorption layer is manufactured by mixing 22% Portland cement, 8% black broken stone having less than 2mm particles, 18% volcanic rock having 4~5mm size, and 52% volcanic rock having 2~3mm size based on aggregate mixing ratio of 100%. The sound insulation layer is manufactured by mixing 52% sand having less than 2mm size, 23% gravel having 13m size, 9% gravel having 19mm size, and 16% Portland cement based on the aggregate mixing ratio of 100%.