CN211774502U

CN211774502U - Surface-reinforced concrete member

Info

Publication number: CN211774502U
Application number: CN201920565013.1U
Authority: CN
Inventors: 包亦望; 郑德志; 万德田; 周建; 王亮亮
Original assignee: China Building Material Test and Certification Group Co Ltd
Current assignee: China Building Material Test and Certification Group Co Ltd
Priority date: 2019-04-24
Filing date: 2019-04-24
Publication date: 2020-10-27
Anticipated expiration: 2029-04-24

Abstract

The utility model discloses a concrete member that surface enhancement was handled belongs to the building material field, the concrete member includes the fashioned base member of common maintenance and inflation layer, the material of base member is the concrete, the inflation layer sets up the surface of base member. During the curing process, the volume of the matrix shrinks and the volume of the expanded layer increases. Under the condition that the base body and the expansion layer are well combined, compression stress can be generated inside the expansion layer, the compression stress can offset partial or all tensile stress applied from the outside, cracks are prevented from being generated on the surface of the concrete member, and therefore the integral breaking strength of the concrete member is improved.

Description

Surface-reinforced concrete member

Technical Field

The utility model relates to a building material field especially indicates a concrete member of surface reinforcing treatment.

Background

Concrete is a common building engineering material and is widely applied in the field of building construction engineering. However, the conventional concrete member is resistant to compression and not tensile, and the tensile surface layer thereof is easily cracked, so that the whole concrete member is broken and fails. Therefore, the flexural strength of the concrete member is generally not high. The conventional improvement in engineering is to add reinforcing bars to the portion of the concrete that is under tension. The reinforcing steel bar has great tensile strength, and can offset the tensile force effect of external application together with the concrete to the holistic anti ability of rolling over of concrete member has been improved. However, the steel bar has high cost, complex binding process and easy corrosion.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the utility model provides a concrete member that surface enhancement was handled, the utility model provides the high holistic rupture strength of concrete member.

The utility model provides a technical scheme as follows:

a concrete member with a surface reinforced treatment comprises a base body and an expansion layer which are formed by co-curing, wherein the base body is made of concrete, and the expansion layer is arranged on the surface of the base body.

Further, the material of the expansion layer comprises high-strength cement and an expansion agent.

Further, the expansion layer is positioned on the surface of the concrete member, which bears external tensile stress.

Further, the concrete member is a simply supported beam, and the expansion layer is arranged on the lower surface of the base body.

Furthermore, the concrete member is a four-side fixing support plate, and the expansion layers are arranged on the upper surface and the lower surface of the base body.

The utility model discloses following beneficial effect has:

the utility model discloses a concrete member includes the base member and sets up the inflation layer on one or more surfaces of base member, and the base member maintains the shaping jointly with the inflation layer, and both have firm interface bonding. The material of the matrix is concrete, the matrix is hardened and shrinks in volume during curing, and the expansion layer is increased in volume during curing. In the case where the base and the expansion layer are well bonded, a compressive stress is generated in the expansion layer, and a tensile stress is generated in the base. The compression stress generated in the expansion layer can offset partial or all tensile stress applied outside and prevent cracks from being generated on the surface of the concrete member, thereby improving the integral breaking strength of the concrete member.

Drawings

FIG. 1 is a schematic structural view of one embodiment of a surface-enhanced concrete member according to the present invention;

FIG. 2 is a force diagram of the concrete element shown in FIG. 1;

FIG. 3 is a schematic structural view of another embodiment of the surface-reinforced concrete member of the present invention;

FIG. 4 is a force diagram of the concrete element shown in FIG. 3;

FIG. 5 is a force diagram of a concrete member as a simply supported beam member;

fig. 6 is a force diagram of a concrete member as a four-side brace member.

Detailed Description

In order to make the technical problems, technical solutions and advantages to be solved by the present invention clearer, the following detailed description will be given with reference to the accompanying drawings and specific embodiments.

The utility model provides a concrete member that surface enhancement was handled, as shown in fig. 1, 3, this concrete member includes fashioned base member 1 of common maintenance and inflation layer 2, and the material of base member 1 is the concrete, and the grade of concrete is selected according to the requirement of concrete member, and inflation layer 2 sets up the surface at base member 1.

The utility model discloses a concrete member includes the base member and sets up the inflation layer on one or more surfaces of base member, and the base member maintains the shaping jointly with the inflation layer, and both have firm interface bonding. The material of the matrix is concrete, the matrix is hardened and shrinks in volume during curing, and the expansion layer is increased in volume during curing. In the case of a well-bonded base and expansion layer, a compressive stress F1 is generated inside the expansion layer, and a tensile stress F2 is generated inside the corresponding base, as shown in fig. 2 and 4. The compressive stress F1 generated inside the expansion layer can offset part or all of the tensile stress F3 (shown in figures 2 and 4) applied outside, and cracks are prevented from being generated on the surface of the concrete member, so that the breaking strength of the whole concrete member is improved.

The utility model discloses a material on inflation layer does not do the injecion, as long as can be in maintenance process volume expansion's material can, as an preferred embodiment, the material on inflation layer includes high strength cement and expanding agent, and high strength cement and expanding agent all are building industry's conventional material among the prior art, the utility model discloses use these conventional materials to reach the purpose that improves the flexural strength of concrete member.

The structure of concrete member is different, and the occasion of using is different, and the surface that leads to the concrete member to receive outside tensile stress is different, the utility model discloses in, the inflation layer is located the concrete member and bears outside tensile stress's face, does not set up the inflation layer on the face that the concrete member did not bear outside tensile stress, can improve the concrete member rupture strength like this, can save the material on inflation layer again.

For example, when one surface of a concrete member is subjected to an external tensile stress, an expansion layer is provided only on the surface, and as shown in fig. 1, an expansion layer is provided on the lower surface. When the upper and lower surfaces of the concrete member are subjected to external tensile stress, the upper and lower surfaces are provided with expansion layers, as shown in fig. 3, and the lower surface is provided with expansion layers

The arrangement of the expansion layer is explained in two specific embodiments below:

the first method is as follows:

the concrete member of this embodiment is a simple beam, and in this case, the expansion layer 2 may be provided on the lower surface of the base 1.

In the concrete member of this embodiment, as shown in fig. 5, the load F applied to the simply supported beam is applied to the upper side of the concrete member (simply supported beam) and the direction of the load F is downward, and at this time, the simply supported beam member receives the external tensile stress F3 at the lower side, so that the lower surface is provided with the expansion layer to satisfy the safe use requirement. The compressive stress F1 in the expansion layer can offset the tensile stress F3 generated by the external load F, thereby improving the flexural strength of the member.

The second method comprises the following steps:

the concrete member of this embodiment is a four-sided fixing plate, and the expansion layers 2 are provided on the upper and lower surfaces of the base 1.

The concrete member of this mode is used as a plate with four sides fixed, as shown in fig. 6, the load F applied to the four sides fixed support plate is applied above the concrete member (four sides fixed support plate), the direction of the load F is downward, and at this time, the four sides fixed support plate member has parts bearing external tensile stress F3 on the upper and lower surfaces, so that the requirement of safe use can be met by arranging expansion layers on the upper and lower surfaces in consideration of the most unfavorable situation. As shown in fig. 6, the compressive stress F1 in the interior of the expansion layer can offset the tensile stress F3 generated in part by the external load F, thereby improving the flexural strength of the member.

The first mode and the second mode are only the explanation of the concrete member in the concrete application of the simply supported beam and the four-side fixing support plate, and the form of the concrete member of the present invention is not limited to the first mode and the second mode, and the concrete member can be provided with the expansion layer on the surface of the concrete member subjected to the external tension.

The foregoing is a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the principle of the present invention, and these improvements and decorations should also be regarded as the protection scope of the present invention.

Claims

1. A concrete member with surface enhancement treatment is characterized by comprising a base body and an expansion layer which are cured and formed together, wherein the base body is made of concrete, the expansion layer is arranged on the surface of the base body, and the base body and the expansion layer are firmly combined through an interface;

the expansion layer is positioned on the surface of the concrete member bearing external tensile stress;

the concrete member is a simply supported beam, and the expansion layer is arranged on the lower surface of the base body; or

The concrete member is a four-side fixing support plate, and the expansion layers are arranged on the upper surface and the lower surface of the base body.

2. The surface enhanced treated concrete member according to claim 1, wherein the material of the expansion layer comprises a high strength cement and an expansion agent.