公开(公告)号：US4557087A

公开(公告)日：1985-12-10

申请号：US528423

申请日：1983-09-01

申请人： Toshiyuki Kitta ,  Wataru Abe

发明人： Toshiyuki Kitta ,  Wataru Abe

IPC分类号： E04C5/10 ,  E04C3/10

CPC分类号： E04C5/10 ,  Y10T428/31529

摘要： A metallic sheath for a posttensioning method wherein an outer peripheral surface or outer and inner peripheral surfaces thereof is (or are) coated with phosphate layer (or layers) and plastic resin layer (or layers) thereupon and preferably further coated with a solid lubricating layer upon the inner peripheral surface of the sheath.The phosphate layer of the outer peripheral surface protect the metallic sheath from corrosion by negative ion within concrete, while, on the other hand, that of the inner peripheral surface prevents the electrochemical corrosion between the inner peripheral surface of the sheath and tendon.Moreover, if a solid lubricating, layer is provided at the inner peripheral surface of the sheath, the sliding friction between the metallic sheath and tendon can be decreased so that prestressed force can be increased as much.

摘要翻译： 一种用于后拉伸方法的金属护套，其外表面或外周表面或外周表面或其外周表面（或被）涂覆有磷酸盐层（或层）和塑料树脂层（或层），并且优选地进一步涂覆有固体润滑层 在护套的内周表面上。 外周表面的磷酸盐层通过负离子保护金属护套免受混凝土的腐蚀，另一方面，内周面的内部表面防止了护套内周面与腱之间的电化学腐蚀。 此外，如果在护套的内周面设置固体润滑层，则可以减少金属护套和腱之间的滑动摩擦，从而可以增加预应力。

公开(公告)号：US4648224A

公开(公告)日：1987-03-10

申请号：US712096

申请日：1985-03-15

申请人： Toshiyuki Kitta ,  Hiroshi Tada ,  Keizo Ishikawa

发明人： Toshiyuki Kitta ,  Hiroshi Tada ,  Keizo Ishikawa

IPC分类号： B28B23/04 ,  E04C5/07 ,  E04C5/08 ,  E04C3/10

CPC分类号： E04C5/07 ,  E04C5/08 ,  Y10S52/07 ,  Y10T428/2927

摘要： A tendon for prestressed concrete wherein inorganic particles are coated on an outer surface of a rod made of fiber reinforced plastic through a plastic adhesive layer. The inorganic particles are formed with minute rugged surface portions on the outer surface of the tendon for prestressed concrete, the rugged surface portions being firmly adhered to concrete. The inorganic particles are coated on the whole outer surface of the tendon for prestressed concrete, on the fixed portions at both ends, or on the fixed portions at both ends and on a portion subjected to the maximum bending moment.

摘要翻译： 一种用于预应力混凝土的腱，其中无机颗粒通过塑料粘合剂层涂覆在由纤维增强塑料制成的杆的外表面上。 无机颗粒在预应力混凝土的腱的外表面上形成有微小的凹凸表面部分，粗糙的表面部分牢固地粘附在混凝土上。 无机颗粒涂覆在预应力混凝土的腱的整个外表面上，在两端的固定部分上，或两端的固定部分和经受最大弯矩的部分上。

公开(公告)号：US4577443A

公开(公告)日：1986-03-25

申请号：US441080

申请日：1982-11-12

申请人： Toshiyuki Kitta ,  Wataru Abe ,  Tadaaki Takase

发明人： Toshiyuki Kitta ,  Wataru Abe ,  Tadaaki Takase

IPC分类号： E04C5/10 ,  E04C5/12

CPC分类号： E04C5/10

摘要： In a prestressed concrete structure executed by posttensioning method, a metallic sheath having an inner peripheral surface thereof in sliding contact with a tendon coated with a solid lubricating coating including polytetrafluoroethylene (PTFE).By the use of this metallic sheath, the sliding frictional resistance produced between the metallic sheath and tendon when the tendon is subjected to tensioning operation is considerably decreased to increase the prestressing force introduced into the structure accordingly.The solid lubricating coating is excellent in flexibility and contact properties, and good characteristics of coating are imparted to the sheath.

摘要翻译： 在通过后拉伸方法执行的预应力混凝土结构中，金属护套的内周表面与涂覆有包含聚四氟乙烯（PTFE）的固体润滑涂层的钢筋滑动接触。 通过使用这种金属护套，当钢筋受到张紧作用时，在金属护套和钢筋之间产生的滑动摩擦阻力大大降低，从而相应地增加引入结构的预应力。 固体润滑涂层的柔韧性和接触性能优异，并且涂层的良好特性赋予护套。