UNDER-BEAM NOISE PREVENTION STRUCTURE HAVING CONCRETE PIECE EXFOLIATION PREVENTION PERFORMANCE AND MANUFACTURING METHOD THEREOF

摘要

PROBLEM TO BE SOLVED: To provide an under-beam noise prevention structure, which can improve performance relating to an influence degree on a third party and has a concrete piece exfoliation prevention performance, and a manufacturing method thereof.;SOLUTION: An under-beam noise prevention structure comprises: an exfoliation prevention layer, which is attached on a concrete surface under a concrete elevated bridge through a first adhesive and has punching resistance of 1.5 MPa or higher; and a sound absorption layer, which is disposed below the exfoliation prevention layer and has an average oblique incident acoustic absorption coefficient of 0.7 or higher.;SELECTED DRAWING: None;COPYRIGHT: (C)2017,JPO&INPIT