Report on material test results of polyethylene cylindrical tubes used for prestressed concrete bridges.

East Nippon Expressway Co., Ltd. /Central Japan Expressway Co., Ltd./West Japan Expressway Co., Ltd. (hereinafter NEXCO3 company) Regarding the polyethylene cylindrical pipe (hereinafter PE sheath) used in the prestressed concrete bridge, NEXCO3 company We would like to inform you that the test results of the specified PE sheath material test (“Polyethylene sheath for inner cable JHS421” established in April 2004) have been released.

NEXCO 3 companies witnessed about PE sheaths with imperfections in test data and incomplete test records, and Estee Engineering Co., Ltd., Wex Japan Co., Ltd., Japan Life Co., Ltd., Kurimoto Iron Works Co., Ltd. PE sheaths delivered by (Kurimoto Tekkosho), Toyo Kako Co., Ltd., Totaku Kogyo Co., Ltd., and Asaba Seisakusho Co., Ltd. Material test was conducted.

As a result, we confirmed that the PE sheaths of all companies have passed the test specified by JHS421, and that the PE sheaths already used have no performance problems and that the safety of the bridge is secured.

In addition, the work that has been temporarily stopped is restarted in sequence after confirming the test results.