CN102747749B

CN102747749B - Indentation steel wire-doped concrete structure and preparation method thereof

Info

Publication number: CN102747749B
Application number: CN201210209480.3A
Authority: CN
Inventors: 陈良洪
Original assignee: 陈良洪
Current assignee: Huwei Hongye Building Materials Technology Development Co., Ltd.
Priority date: 2012-06-25
Filing date: 2012-06-25
Publication date: 2014-05-21
Anticipated expiration: 2032-06-25
Also published as: CN102747749A

Abstract

The invention provides an indentation steel wire-doped concrete structure, which comprises concrete and reinforcing ribs. A plurality of indentation steel wires are doped in the concrete to be mixed to form a doped concrete layer; the indentation steel wires are 18-30mm long, 2-4mm wide and 0.5-1.5mm thick, and the indentation is 3mm deep. The doped concrete layer is divided into multiple layers according to different proportions of the doped indentation steel wires, wherein one of the proportions is shown as follows: the weight percentage of the indentation steel wires to the concrete is 1-5 percent, and the other proportion is shown as follows: the weight percentage of the indentation steel wires to the concrete is 10-20 percent. According to the Indentation steel wire-doped concrete structure and a preparation method thereof provided by the invention, through adopting the shape and the structure, the failure load of the concrete structure is increased; the highest failure load of a concrete manhole cover which is 800mm in diameter can reach 945KN, and the cracking load can reach up to 405KN.

Description

The method of the concrete structure of preparation doping impression steel wire

Technical field

The present invention relates to a kind of precast concrete product, particularly a kind of concrete structure and preparation method of the doping impression steel wire for concrete manhole cover.

Background technology

The multiple steel fibrous concrete that has using on market is at present built the concrete-pouring synthetic manhole forming, wherein Chinese patent 02138259.X disclosed " preparation method of wire net reinforced concrete manhole cover " is the most representative, this processing method has strengthened the intensity of concrete-pouring synthetic manhole, but in actual use, its structure is not the best, exist difficulty of processing larger, weight is heavier, the shortcoming that waste of material is larger.

Conventional in prior art is to adopt steel fibre to add in concrete, to increase concrete intensity, existing steel fibre adopts circular steel wire to make conventionally, on round wire, be provided with impression, the problem existing is poor with concrete adhesion, Chinese patent 99225523.6 discloses a kind of end-tooth-type steel fibre, structure is the approximate rectangular steel fibre of cross section, and respectively there is the tooth of a protrusion at its two ends.The problem existing is that difficulty of processing is higher, for equipment, especially shearing equipment require highly, and waste of material is larger.

Summary of the invention

Technical problem to be solved by this invention is to provide a kind of concrete structure of the impression steel wire that adulterates, and can effectively improve the failure load of concrete structure, and more for ease of processing.

For solving the problems of the technologies described above, the technical solution adopted in the present invention is: a kind of concrete structure of the impression steel wire that adulterates, comprise concrete and reinforcing rib, and in concrete, be mixed into doping layer of concrete doped with many impression steel wires;

Described impression steel wire length 18-30mm, width 2-4mm, thickness 0.5-1.5mm, depth of cup 3mm.

Described doping layer of concrete is divided into multilayer according to the proportioning difference of doping impression steel wire;

One of them proportioning is that impression steel wire and concrete percentage by weight are 1-5%;

Wherein another proportioning is that impression steel wire and concrete percentage by weight are 10-20%.

Many described reinforcing ribs are crisscross is welded to form multilayer laminated structure, the end of each reinforcing rib and housing welding, the position of described reinforcing rib and housing welding, near the bottom of housing, has at least the reinforcing rib of each one deck in length and breadth to have the shape arching upward in middle part.

Described impression steel wire is provided with multiple impressions, and the width of Indentation position is compared with the wide 0.3-1mm of the width of other positions.

A method of preparing the concrete structure of doping impression steel wire, comprises the following steps:

One, housing is placed in mould, inserts the 3rd doping layer of concrete, in this layer, impression steel wire and concrete percentage by weight are 1-5%;

Two, smash shake closely knit after, insert the second doping layer of concrete, in this layer, impression steel wire and concrete percentage by weight are 10-20%;

Three, smash shake closely knit after, insert the first doping layer of concrete, in this layer, impression steel wire and concrete percentage by weight are 1-5%;

Obtain by above-mentioned steps the concrete structure that failure load exceedes the doping impression steel wire of 360KN.

Concrete structure and the preparation method of doping impression steel wire provided by the invention, by adopting above-mentioned shape and structure, improved the failure load of concrete structure, the failure load of the concrete manhole cover of diameter 800mm is the highest can reach 945KN, cracking load 405 KN.And the highest ranking failure load of existing standard is 360 KN.Above-mentioned experimental data is provided by Suzhou concrete water mud product research institute.

Inventor finds, the impression steel wire adulterating in layer of concrete is not The more the better, although more impression steel wire makes strength increase, also increase the possibility that produces crack, affect the outward appearance of concrete products, and increase the probability that impression steel wire is corroded, therefore, the present invention has adopted at the impression steel wire that adulterates less near the position of outer wall, at the impression steel wire that adulterates more near inner position, obtain thus the balance of performance, and saved steel approximately 25%.

Special impression steel wire, lower difficulty of processing, adopt mould by steel wire embossing, and mould is applied to larger pressure, make under pressure, the distortion that impression position is pressed by mould, width increases, do not increasing under the prerequisite of too many difficulty of processing thus, further improving impression steel wire and concrete adhesion, or be called bond stress.

Accompanying drawing explanation

Below in conjunction with drawings and Examples, the invention will be further described:

Fig. 1 is the structural representation of the framework in the present invention.

Fig. 2 is the A-A cross-sectional schematic of Fig. 1.

Fig. 3 is the structural representation of partial cross-section of the present invention, and this accompanying drawing has adopted omissive representation, omits the symmetrical structure of opposite side.

Fig. 4 is the front view of impression steel wire in the present invention.

Fig. 5 is the top view of impression steel wire in the present invention

In figure: housing 1, reinforcing rib 2, the first doping layer of concrete 3, the second doping layer of concrete 4, the three doping layer of concrete 5, impression steel wire 6.

The specific embodiment

In Fig. 1-5, a kind of concrete structure of the impression steel wire that adulterates, comprises concrete and reinforcing rib 2, in concrete, is mixed into doping layer of concrete doped with many impression steel wires 6;

In Fig. 4,5, described impression steel wire 6 length 18-30mm, width 2-4mm, thickness 0.5-1.5mm, depth of cup 3mm.Described depth of cup refers to as in Fig. 4, the height from summit to the lowest point.Inventor's discovery, at the concrete structure for well lid, the dimensional parameters of above-mentioned impression steel wire 6, makes the saving of intensity, failure load, cracking load and the material of structure reach optimization.

In Fig. 3, described doping layer of concrete is divided into multilayer according to the proportioning difference of doping impression steel wire 6;

One of them proportioning is that impression steel wire 6 is 1-5% with concrete percentage by weight;

Wherein another proportioning is that impression steel wire 6 is 10-20% with concrete percentage by weight.Structure thus, make skin have good crack resistance and outward appearance, and the weight capacity of internal layer is better.

In Fig. 1,2, described many reinforcing ribs 2 are crisscross is welded to form multilayer laminated structure, the end of each reinforcing rib 2 and housing 1 weld, and the position that described reinforcing rib 2 and housing 1 weld, near the bottom of housing 1, has at least the reinforcing rib 2 of each one deck in length and breadth to have the shape arching upward in middle part.Structure thus, has obtained higher load-bearing property.

In Fig. 5, described impression steel wire 6 is provided with multiple impressions, and the width of Indentation position is compared with the wide 0.3-1mm of the width of other positions.When these wider impressions are suppressed by mould, band steel line extends thereupon, produce, by these wider impressions, impression steel wire 6 is better with concrete adhesion, thereby has promoted supporting capacity,

One, housing 1 is placed in mould, inserts the 3rd doping layer of concrete 5, in this layer, impression steel wire 6 is 1-5% with concrete percentage by weight;

Two, smash shake closely knit after, insert the second doping layer of concrete 4, in this layer, impression steel wire 6 is 10-20% with concrete percentage by weight;

Three, smash shake closely knit after, insert the first doping layer of concrete 3, in this layer, impression steel wire 6 is 1-5% with concrete percentage by weight;

Claims

1. a method of preparing the concrete structure of doping impression steel wire, is characterized in that comprising the following steps:

One, housing (1) is placed in mould, inserts the 3rd doping layer of concrete (5), in this layer, impression steel wire (6) is 1-5% with concrete percentage by weight;

Two, smash shake closely knit after, insert the second doping layer of concrete (4), in this layer, impression steel wire (6) and concrete percentage by weight are 10-20%;

Three, smash shake closely knit after, insert the first doping layer of concrete (3), in this layer, impression steel wire (6) and concrete percentage by weight are 1-5%;