(812) 309-78-59
(495) 223-46-76
ASTM A881/A881M-16a
Standard Specification for Steel Wire, Indented, Low-Relaxation for Prestressed Concrete
4 стр.
Заменен
Электронный (pdf)Печатное издание
68.64 $ (включая НДС 20%)
Разработчик:
Зарубежные/ASTM
ICS:
77.140.15 Steels for reinforcement of concrete / Стали для армирования бетона
Сборник (ASTM):
01.04 Steel--Structural, Reinforcing, Pressure Vessel, Railway / Сталь - Конструкционная, арматурная, для сосудов под давлением, рельсовая
Тематика:
Steel--Structural, Tubes, Plate, Coated
Описание
Реферат

This specification covers uncoated, deformed, stress-relieved, and low-relaxation wire for use as prestressed tendons in concrete railroad ties. Deformed wires with nominal diameters shall be supplied in coils and shall conform to specified values of breaking strength requirements. The relaxation losses of normal stress-relieved and low-relaxation stress-relieved wires should not exceed the specified limits. The two acceptable types of deformed wire shall have specific dimensions of deformations, where the depth of indent shall be the average depth of six or more random indents measured at maximum depth. The material shall be tested on and shall conform to specified values of the following mechanical properties: breaking strength, load at 1% extension, elongation, bending, and relaxation.

Область применения

1.1 This specification covers indented, low-relaxation steel wire for use in prestressed concrete.

1.2 The values stated in either inch-pound units or SI units are to be regarded separately as standard. Within the text, the SI units are shown in brackets. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the specification.

Ключевые слова:
indented wire; low-relaxation wire; prestressed concrete; steel wire (tendon);