CN201915284U - 1x19I indented prestressed steel strand - Google Patents

Abstract

The utility model provides a 1x19I indented prestressed steel strand. The prestressed steel strand is formed by nineteen steel wires through twisting, and is characterized in that a core wire is a polished round steel wire; intermediate wires are three polished round steel wires and three indented steel wires which are alternately arranged; edge wires are four polished round steel wires and eight indented steel wires which are alternately arranged, wherein one polished round steel wire is sandwiched between every two indented steel wires; and each indented steel wire is formed in a manner that three sides of a polished round steel wire are rolled in the radial direction, and indents on the three sides are round and are uniformly distributed on the circumference at regular intervals. The bond stress between the steel strand and concrete is increased, the problem of the sliding and retraction of the core wire and the intermediate wires is solved, and good mechanical properties of the steel strand are maintained; and the steel strand meets the Standards for Steel Strands for Prestressed Concrete (GB/T5224-2003), and improves the quality of prestressed concrete members.

Description

1 * 19I prestress wire of band indentation

Technical field

The utility model relates to a kind of building trade prestressing steel technical field, particularly relates to employed indented steel stranded wire 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.

Steel strand wires in standard GB/T5224-2003 " steel strand wires for prestressed concrete " at present comprise 1 * 2,1 * 3,1 * 7 etc., all are the standard steel section twisted wires that are twisted into by plain steel wire.This structural steel shape twisted wire, exist deficiency, because the plain steel wire surface is smooth, 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, restricted the quality and the life-span of prestressed concrete member, and reduced steel strand wires and concrete bond stress.

According to 1 * 19 steel strand wires of customer demand exploitation, the not enough problem of core silk and intermediate filament slippage problem and bond stress is particularly serious.

In order to address the above problem, need a kind of novel steel strand wires of design, solve the not enough problem of core silk slippage retraction problems and bond stress, improve the mechanical property of steel strand wires.

Summary of the invention

The purpose of this utility model is to provide a kind of 1 * 19 prestress wire in order to overcome deficiency of the prior art, strengthens and grip of concrete, and the intensity height solves core silk and intermediate filament slippage retraction problems, and mechanical property is good, applied range.

The technical scheme that the utility model adopted is: a kind of 1 * 19I prestress wire with indentation is provided, form by 19 steel wire twistings, it is characterized in that: the core silk be plain steel wire, intermediate filament be 3 plain steel wires and 3 indented wires alternately, the limit silk be 4 plain steel wires and 8 indented wires alternately, per 2 indented wires are 1 plain steel wire at interval, described indented wire be by plain steel wire radially three rollings form, three indentations evenly distribute at circumference, rule at interval, indentation be a circle.

Preferably, the width of nick of described indented wire is 0.12 ± 0.05mm, and indentation length is 5.0 ± 0.05mm, and pitch of nick is 16 ± 0.05mm.

The beneficial effects of the utility model are: increased steel strand wires and concrete bond stress, core silk and intermediate filament slippage retraction problems have been solved, kept steel strand wires good mechanical performance, meet GB/T5224-2003 " steel strand wires for prestressed concrete " standard, 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, plain steel wire 2, indented wire

3, 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, the utility model is formed by 19 steel wire twistings, it is characterized in that: the core silk be plain steel wire 1, intermediate filament be 3 plain steel wires 1 and 3 indented wires 2 alternately, the limit silk be 4 plain steel wires 1 and 8 indented wires 2 alternately, per 2 indented wires 2 are 1 plain steel wire 1 at interval, described indented wire 2 be by plain steel wire 1 radially three rollings form, three indentations evenly distribute at circumference, rule at interval, indentation be a circle.

Wherein, indentation 3 degree of depth of described indented wire 2 are 0.12 ± 0.05mm, and indentation 3 length are 5.0 ± 0.05mm, and indentation 3 pitches are 16 ± 0.05mm.

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 * 19I prestress wire with indentation, form by 19 steel wire twistings, it is characterized in that: the core silk be plain steel wire, intermediate filament be 3 plain steel wires and 3 indented wires alternately, the limit silk be 4 plain steel wires and 8 indented wires alternately, per 2 indented wires are 1 plain steel wire at interval, described indented wire be by plain steel wire radially three rollings form, three indentations evenly distribute at circumference, rule at interval, indentation be a circle.

2. a kind of 1 * 19I prestress wire as claimed in claim 1 with indentation, it is characterized in that: the width of nick of described indented wire is 0.12 ± 0.05mm, and indentation length is 5.0 ± 0.05mm, and pitch of nick is 16 ± 0.05mm.

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