CN213979574U

CN213979574U - Gradient function beam

Info

Publication number: CN213979574U
Application number: CN202022366105.2U
Authority: CN
Inventors: 欧阳小伟; 蒙绍强; 李嘉良; 车德颢
Original assignee: Guangzhou University
Current assignee: Guangzhou University
Priority date: 2020-10-21
Filing date: 2020-10-21
Publication date: 2021-08-17
Anticipated expiration: 2030-10-21

Abstract

The utility model discloses a gradient functional beam, which comprises a first ultra-high performance concrete layer, a second ultra-high performance concrete layer and an ultra-high performance concrete tensile layer, wherein the ultra-high performance concrete tensile layer, the second ultra-high performance concrete layer and the first ultra-high performance concrete layer are sequentially arranged from bottom to top; the first ultrahigh-performance concrete layer is made of recycled fine aggregate concrete; the gradient functional beam is sequentially arranged from bottom to top through the ultrahigh-performance concrete tensile layer, the second ultrahigh-performance concrete layer and the first ultrahigh-performance concrete layer, wherein the ultrahigh-performance concrete tensile layer has the characteristics of high tensile strength and high toughness, the second ultrahigh-performance concrete layer subtracts the fiber content, the cost is reduced without influencing the strength requirement, the first ultrahigh-performance concrete layer has great compressive strength, the raw material cost is greatly reduced by adopting recycled fine aggregate concrete, the size of the gradient functional beam is smaller than that of a common concrete beam, and the structural space can be saved.

Description

Gradient function beam

Technical Field

The utility model relates to a building material technical field, in particular to gradient function roof beam.

Background

The concrete material plays an important role in the urbanization process of China, after the urbanization process is opened, the urbanization process is greatly accelerated, and the problem of structural member damage is also faced in the past of decades. The damage of the concrete structure is mostly related to the cracking of the concrete, the reinforcement ratio is increased, the construction difficulty is increased, and the toughness of the absorption capacity of the steel bar is not fully exerted by the high-strength steel bar. In recent years, steel fiber ultrahigh-performance concrete is used in engineering, has excellent tensile strength, can reduce cracking in a tension area, has good durability, and can obviously improve the durability of a member, but the steel fiber ultrahigh-performance concrete has high raw material price, so that the investment cost of putting the member is increased, and the popularization and the use of the steel fiber ultrahigh-performance concrete are influenced.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to solve one of the technical problem that exists among the prior art at least, provide a gradient function roof beam, can make the performance of material intensity be the gradient and change, the performance of every kind of material of full play to reach the effect that reduces manufacturing cost.

According to an embodiment of the first aspect of the present invention, a gradient functional beam is provided, which comprises a first ultrahigh performance concrete layer, a second ultrahigh performance concrete layer and an ultrahigh performance concrete tensile layer, wherein the ultrahigh performance concrete tensile layer, the second ultrahigh performance concrete layer and the first ultrahigh performance concrete layer are sequentially arranged from bottom to top; wherein the first ultra-high performance concrete layer is made of recycled fine aggregate concrete.

Has the advantages that: the gradient functional beam is sequentially arranged from bottom to top through the ultrahigh-performance concrete tensile layer, the second ultrahigh-performance concrete layer and the first ultrahigh-performance concrete layer, wherein the ultrahigh-performance concrete tensile layer has the characteristics of high tensile strength and high toughness, the development of cracks in a tensile area in the working process is greatly inhibited, the service life of the beam is prolonged, the fiber content is reduced in the second ultrahigh-performance concrete layer, the cost is reduced under the condition that the strength requirement is not influenced, the raw material cost is greatly reduced by adopting the recycled fine aggregate concrete while the first ultrahigh-performance concrete layer has great compressive strength, the green environmental protection is ensured, the volume of the beam is smaller than that of a common concrete beam, and the structural space can be saved.

According to the utility model discloses the gradient function roof beam of the first aspect embodiment, the intensity grade of regeneration fine aggregate concrete is not less than 100 Mpa.

According to the utility model discloses the gradient function roof beam of first aspect embodiment, the thin aggregate concrete of regeneration includes the thin aggregate of regeneration of different particle diameters.

According to the utility model discloses the gradient function roof beam of first aspect embodiment, the material on second ultra high performance concrete layer is ultra high performance concrete.

According to the utility model discloses the gradient function roof beam of first aspect embodiment, the material on ultra high performance concrete tensile layer is the ultra high performance concrete of steel fibre.

According to the utility model discloses the gradient function roof beam of first aspect embodiment, the intensity grade of steel fibre ultra high performance concrete is greater than 100Mpa, and the slump of institute steel fibre ultrahigh strength concrete is 300mm ~ 400 mm.

According to the utility model discloses the gradient function roof beam of first aspect embodiment, the thickness proportion on ultra high performance concrete tensile layer, second ultra high performance concrete layer and first ultra high performance concrete layer is 1: 1: 2.

drawings

In order to more clearly illustrate the technical solution in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described below. It is clear that the described figures represent only some embodiments of the invention, not all embodiments, and that a person skilled in the art can also derive other designs and figures from these figures without inventive effort.

Fig. 1 is a schematic structural diagram of an embodiment of the present invention.

Detailed Description

This section will describe in detail the embodiments of the present invention, preferred embodiments of the present invention are shown in the attached drawings, which are used to supplement the description of the text part of the specification with figures, so that one can intuitively and vividly understand each technical feature and the whole technical solution of the present invention, but they cannot be understood as the limitation of the protection scope of the present invention.

In the description of the present invention, it should be understood that the orientation or positional relationship indicated with respect to the orientation description, such as up, down, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, a plurality of means are one or more, a plurality of means are two or more, and the terms greater than, less than, exceeding, etc. are understood as not including the number, and the terms greater than, less than, within, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present invention, unless there is an explicit limitation, the words such as setting, installation, connection, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in combination with the specific contents of the technical solution.

Referring to fig. 1, a gradient functional beam includes a first ultra-high performance concrete layer 10, a second ultra-high performance concrete layer 20, and an ultra-high performance concrete tensile layer 30, the second ultra-high performance concrete layer 20, and the first ultra-high performance concrete layer 10 being sequentially arranged from bottom to top; wherein the first ultra-high performance concrete layer 10 is made of recycled fine aggregate concrete. The gradient functional beam is sequentially arranged from bottom to top through the ultra-high performance concrete tensile layer 30, the second ultra-high performance concrete layer 20 and the first ultra-high performance concrete layer 10, wherein the ultra-high performance concrete tensile layer 30 has the characteristics of high tensile strength and high toughness, the development of cracks in a tensile area in the working process is greatly inhibited, the service life of the gradient functional beam is prolonged, the fiber content is reduced by the second ultra-high performance concrete layer 20, the cost is reduced under the condition that the strength requirement is not influenced, the first ultra-high performance concrete layer 10 has great compressive strength, the raw material cost is greatly reduced by adopting the recycled fine aggregate concrete, the environmental protection is guaranteed, the size of the gradient functional beam is smaller than that of a common concrete beam, and the structural space can be saved.

In this embodiment, the strength grade of the recycled fine aggregate concrete is not less than 100Mpa, and the recycled fine aggregate concrete is made to be ultra-high performance concrete on the premise of ensuring the strength, workability and durability of the recycled fine aggregate concrete. Preferably, the recycled fine aggregate concrete comprises recycled fine aggregates of different particle sizes. Specifically, the recycled fine aggregates with different particle sizes are adopted mainly for meeting the compact pushing theory, and the recycled fine aggregates with different particle sizes are used for replacing quartz sand and cement in the ultra-high performance concrete respectively, so that the manufacturing cost is reduced while the overall strength is ensured.

Preferably, the second ultra-high performance concrete layer 20 is made of ultra-high performance concrete. The concrete is cast by taking the ultra-high performance concrete as a matrix. The strength grade of the ultra-high performance concrete is not less than 100 MPa.

Preferably, the ultra-high performance concrete tensile layer 30 is made of steel fiber ultra-high performance concrete, and is formed by pouring the steel fiber ultra-high performance concrete as a matrix. The strength grade of the steel fiber ultrahigh-performance concrete is more than 100Mpa, and the slump of the steel fiber ultrahigh-performance concrete is 300-400 mm.

Preferably, the thickness ratio of the ultra-high performance concrete tensile layer 30 to the second ultra-high performance concrete layer 20 to the first ultra-high performance concrete layer 10 is 1: 1: 2.

the preparation method of the gradient functional beam is that steel fiber ultra-high performance concrete is poured in a mould, the ultra-high performance concrete is poured after a period of time, and then the regenerated fine aggregate ultra-high performance concrete is poured after a period of time, so that the integrated high performance structural beam is formed, the concrete is completely initially set and then stands for a period of time, then the mould is removed, and then steam curing is carried out, so that the transition of different functions from the top layer to the bottom layer is realized, the performance of each material is exerted, the function of adapting to external complex working conditions is achieved, meanwhile, the comprehensive use functions, such as high tensile property, light weight, economical cost and the like, are improved, and the overall use performance is improved.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art.

Claims

1. A gradient functional beam, comprising:

the concrete tensile layer is characterized by comprising a first ultrahigh-performance concrete layer, a second ultrahigh-performance concrete layer and an ultrahigh-performance concrete tensile layer, wherein the ultrahigh-performance concrete tensile layer, the second ultrahigh-performance concrete layer and the first ultrahigh-performance concrete layer are sequentially arranged from bottom to top;

the first ultrahigh-performance concrete layer is made of recycled fine aggregate concrete.

2. The gradient functional beam of claim 1, wherein: the strength grade of the recycled fine aggregate concrete is not less than 100 MPa.

3. The gradient functional beam of claim 2, wherein: the recycled fine aggregate concrete comprises recycled fine aggregates with different particle sizes.

4. The gradient functional beam of claim 1, wherein: the second ultrahigh-performance concrete layer is made of ultrahigh-performance concrete.

5. The gradient functional beam of claim 1, wherein: the material of the ultra-high performance concrete tensile layer is steel fiber ultra-high performance concrete.

6. The gradient functional beam of claim 5, wherein: the strength grade of the steel fiber ultrahigh-performance concrete is greater than 100Mpa, and the slump of the steel fiber ultrahigh-performance concrete is 300-400 mm.

7. A gradient functional beam according to any one of claims 1 to 6, wherein: the thickness ratio of the ultra-high performance concrete tensile layer to the second ultra-high performance concrete layer to the first ultra-high performance concrete layer is 1: 1: 2.