CN201962541U - 1X3I steel strand - Google Patents

Abstract

The utility model provides a 1X3I steel strand. The steel strand is formed by three steel wires which are twisted, wherein the three steel wires are two smooth-faced steel wires and one indented steel wire; four radial surfaces of the indented steel wire are provided with indents, and the indents on the four surfaces are mutually perpendicular and are oval; and the diameters Phi of the steel wires range from 2.9mm to 6.00mm, the depths of the indents range from 0.02mm to 0.2mm, the lengths of the indents range from 4mm to 6.4mm, and the pitches of the indents range from 8mm to 20mm. The steel strand has the benefits of higher grip between the steel strand and concrete, high strength, good mechanical properties and wide application range, and can solve the problem of the sliding retraction of a core wire and intermediate wires.

Description

A kind of 1 * 3I steel strand wires

Technical field

The utility model relates to a kind of building trade prestressing steel technical field, particularly relates to employed 1 * 3I steel strand wires in a kind of prestressed concrete member.

Background technology

Prestressed concrete member in the building trade in order to increase mechanical properties such as member resistance to compression, antidetonation, mostly uses compressor wire or steel strand wires to make arrangement of reinforcement.The quality of the bond stress between its arrangement of reinforcement and the concrete is the key factor of decision prestressed concrete member quality.

The prestressed concrete member of present technology adopts plain steel wire or single rule deforming steel wire or has the steel strand wires that symmetrical indented wire is done or formed by the above steel wire system of twisting is prestressed concrete member adapted master muscle, there are the following problems: 1, the plain steel wire surface is smooth, bond stress is less, 2, the steel strand wires that have the plain steel wire system of twisting to form, only depend on the back pressure stress of the frictional force generation of the non-effective contact between the plain steel wire to concrete component, very easily produce core silk limit portion slippage retraction, cause the minimizing of core silk stress or lose stress fully, restrict the quality and the life-span of prestressed concrete member, and reduced steel strand wires and concrete bond stress; 3, single rule deforming steel wire or the steel strand wires that have symmetrical indented wire or formed by the above steel wire system of twisting, and the bond stress between the concrete is less, especially the former stress is concentrated seriously, causes prestressed concrete member second-rate.

Summary of the invention

The purpose of this utility model is to provide a kind of enhancing and grip of concrete in order to overcome deficiency of the prior art, and the intensity height solves core silk and intermediate filament slippage retraction problems, and mechanical property is good, 1 * 3I steel strand wires of applied range.

The technical scheme that the utility model adopted is: a kind of 1 * 3I steel strand wires, described steel strand wires are formed by three steel wires system of twisting, described three steel wires are two bright steel wires and an indented wire, described indented wire radially four sides has indentation, the four sides indentation is mutually 90 °, and described indentation is oval.

Described steel wire diameter is φ 2.9mm-6.00mm, and described width of nick is 0.02mm-0.2mm, and indentation length is 4mm-6.4mm, and pitch of nick is 8mm-20mm.

The beneficial effects of the utility model are: increased steel strand wires and concrete bond stress, solved core silk and intermediate filament slippage retraction problems, kept steel strand wires good mechanical performance, improved the prestressed concrete member quality.

Description of drawings

Fig. 1 is the utility model structural representation.

Fig. 2 is the utility model indented wire contour structures schematic diagram.

Wherein: 1, steel strand wires 2, bright steel wire 3, indented wire

4, indentation

The specific embodiment

In order to further specify summary of the invention of the present utility model and characteristics, specify as follows in conjunction with the embodiments:

As shown in Figure 1 and Figure 2, steel strand wires 1 described in the utility model are formed by three steel wires system of twisting, and described three steel wires are two bright steel wires 2 and an indented wire 3, and described indented wire 3 radially four sides has indentation 4, four sides indentation 4 is mutually 90 °, and described indentation 4 is oval.Described steel wire diameter is φ 2.9mm-6.00mm, and described indentation 4 degree of depth are 0.02mm-0.2mm, and indentation 4 length are 4mm-6.4mm, and indentation 4 pitches are 8mm-20mm.

The above only is preferred embodiment of the present utility model, is not scope of the present utility model is limited, and various distortion and improvement that those of ordinary skills make the technical solution of the utility model all should fall in the utility model protection domain.

Claims (2)

1. 1 * 3I steel strand wires, it is characterized in that: described steel strand wires are formed by three steel wires system of twisting, and described three steel wires are two bright steel wires and an indented wire, and described indented wire radially four sides has indentation, the four sides indentation is mutually 90 °, and described indentation is oval.

2. a kind of 1 * 3I steel strand wires as claimed in claim 1 is characterized in that: described steel wire diameter is φ 2.9mm-6.00mm, and described width of nick is 0.02mm-0.2mm, and indentation length is 4mm-6.4mm, and pitch of nick is 8mm-20mm.

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