WO2017177749A1

WO2017177749A1 - Building reinforcement structure and building reinforcement method

Info

Publication number: WO2017177749A1
Application number: PCT/CN2017/072572
Authority: WO
Inventors: 魏从杰; 张芹; 赵秋红; 李键
Original assignee: 张家港英华材料科技有限公司
Priority date: 2016-04-15
Filing date: 2017-01-25
Publication date: 2017-10-19

Abstract

A building reinforcement structure (100) and a building reinforcement method. The building reinforcement structure (100) comprises: a building foundation (110), an interfacial agent layer (120) covering the surface of the building foundation (110), a first polymer mortar layer (130) covering the interfacial agent layer (120), a fiber grid (140) partially embedded into the first polymer mortar layer (130), and a second polymer mortar layer (150) covering the first polymer mortar layer (130) and the fiber grid (140). The building reinforcement method is also provided. The building reinforcement structure (100) is thin in thickness and desirable in endurance.

Description

Building reinforcement structure and building reinforcement method

Technical field

The invention relates to the field of geotechnical construction, in particular to a building reinforcement structure and a building reinforcement method.

Background technique

Due to environmental corrosion, load, vibration, impact and other factors, buildings may cause cracking, spalling, deformation, water seepage and other diseases, which will affect the local or even the overall function of the building.

In order to eliminate the above-mentioned diseases of the building, the building needs to be reinforced. At present, there are two main methods for building reinforcement:

(1) Reinforced steel/steel mesh-concrete reinforcement method, the method has large repair layer thickness, greatly reduces the space of the original structure, and has the disadvantages of non-corrosion resistance and high cost;

(2) A method of reinforcing a steel plate, which can reduce the thickness of the repair layer, but has disadvantages such as poor durability.

Summary of the invention

Based on this, it is necessary to provide a building reinforcement structure with small thickness and durability for the problem of large repair layer thickness and poor durability in the prior art.

A building reinforcement structure comprising:

Building base;

An interface agent layer covering the surface of the building base;

a first polymer mortar layer overlying the interface agent layer;

a fiber grating partially embedded in the first polymer mortar layer;

And a second polymer mortar layer overlying the first polymer mortar layer and the fiber grid.

In the above-mentioned building reinforcement structure, since the two-layer polymer mortar layer is sandwiched by the fiber grating, the thickness of the repair layer is small, the utilization of the structure space is improved, and the reinforcement strength can be remarkably enhanced. It also has the advantages of corrosion resistance, peeling resistance, impact resistance and fire resistance, as well as extending the life of the building. In addition, it has the advantages of convenient construction, quick repair, anti-corrosion, anti-peeling, impact and fire resistance, and prolong the service life of the structure.

In one embodiment, the surface of the fiber grating is further provided with a glue layer; the glue layer is formed of a fiber grating modification composition of the following composition:

Since the adhesive layer is attached to the surface of the fiber grating, the fiber grating has a greater adhesive force with the first polymer mortar layer and the second polymer mortar layer, forming a good synergistic effect; and then the fiber grating is improved. The combination with the main material further enhances the reinforcement performance of the building reinforcement structure.

In one embodiment, the first polymeric mortar layer has a thickness of from 1 to 2 cm.

In one embodiment, the second polymeric mortar layer has a thickness of from 1 to 3 cm.

In one embodiment, the interface agent layer has a thickness of 0.01 to 1 mm.

In one embodiment, the fiber grid is a carbon fiber grid, a fiberglass grid, an aramid fiber grid, or a linen fiber grid.

The invention also provides a method of building reinforcement.

A building reinforcement method includes the following steps:

Applying an interface agent to the surface of the building base;

Coating a first polymer mortar on the interface agent, and embedding the fiber grating portion into the first polymer mortar;

A second polymer mortar is applied to the surface of the first polymeric mortar and to the fiber grid.

The above-mentioned building reinforcement method is simple and easy to operate, convenient in construction, and can quickly repair and strengthen the building. The formed building reinforcement structure has a small thickness of the repair layer, which improves the utilization of the structure space; and improves the reinforcement strength. It also has anti-corrosion, anti-peeling, impact and fire resistance properties. And extend the life of the building and so on.

In one embodiment, before the step of embedding the fiber grating portion into the first polymer mortar, further comprising attaching a glue layer on a surface of the fiber grating; the glue layer is composed of the following components The fiber grating modification composition is formed:

In one embodiment, the surface of the building substrate is surface treated prior to application of the interface agent.

In one embodiment, the interface agent is applied by spraying, rolling or brushing.

In one embodiment, the first polymeric mortar is applied by spraying or smearing.

In one embodiment, the fiber grating is embedded by wiping the fiber grid with a spatula.

DRAWINGS

1 is a partial cross-sectional view showing a building reinforcement structure according to an embodiment of the present invention.

2 is a schematic cross-sectional view showing a building reinforcement structure according to an embodiment of the present invention.

3 is a perspective view of a fiber grating according to another embodiment of the present invention.

Figure 4 is a schematic cross-sectional view of the grid of the fiber grid of Figure 3.

detailed description

In order to facilitate the understanding of the present invention, the present invention will be described more fully hereinafter with reference to the accompanying drawings. Preferred embodiments of the invention are given in the drawings. However, the invention may be embodied in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that this disclosure will be more fully understood.

It should be noted that when an element is referred to as being "set to" another element, it can be directly in another There may also be intermediate elements on the component. When an element is considered to be "connected" to another element, it can be directly connected to the other element or. The terms "vertical", "horizontal", "left", "right", and the like, as used herein, are for the purpose of illustration and are not intended to be the only embodiment.

All technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs, unless otherwise defined. The terminology used in the description of the present invention is for the purpose of describing particular embodiments and is not intended to limit the invention. The term "and/or" used herein includes any and all combinations of one or more of the associated listed items.

1-2, a building reinforcement structure 100 according to an embodiment of the present invention includes a building base 110, an interface agent layer 120 overlying the surface of the building base 110, and a first polymer overlying the interface agent layer 120. The mortar layer 130, the fiber grating 140 partially embedded in the first polymer mortar layer 130, and the second polymer mortar layer 150 overlying the first polymer mortar layer 130 and the fiber grating 140.

The building base 110 refers to a part or area of a building to be repaired or to be reinforced, and may be a top surface, a side surface, or a bottom surface of the building. The building base of the present invention may be a tunnel base, a road base, a bridge base, a slope base, or a house base. That is, the building reinforcement structure of the present invention can be applied to tunnels, roads, bridges, slopes, houses, and the like.

Among them, the main function of the interface layer 120 is to improve the physical and/or chemical properties of the surface of the building substrate 110, thereby improving the bonding force between the building substrate 110 and the repair layer. Specifically, the interface agent layer 120 is formed after the interface agent coated on the building substrate 110 is dried. Among them, the interface agent is well known to those skilled in the art, and an emulsion type interface agent or a dry powder type interface agent may be selected. Preferably, the interface agent layer 120 has a thickness of 0.01 to 1 mm.

Wherein, the first polymer mortar layer 130 is formed by solidification of the first polymer mortar attached to the outer side of the interface agent layer 120. A first polymer mortar layer 130, which is formed with the fiber grid 140 and the second polymer mortar layer 150 as a core portion of the repair layer, provides mechanical strength to the repair layer. The thickness of the first polymer mortar layer 130 is not particularly limited in the present invention, and those skilled in the art can select a suitable thickness according to actual conditions. Preferably, the first polymer mortar layer 130 has a thickness of 1 to 2 cm. This makes it easier to form the first polymer mortar layer 130 in a region such as a slope or a top surface, and is effective against The casting or peeling of the first polymer mortar during the construction process.

Among them, the fiber grating 140 is a geotechnical material commonly used in the art, and generally is a mesh structural material made of a fiber bundle using a certain weaving process. In the present embodiment, the fiber grating 140 is a glass fiber grating, that is, a glass fiber grating (referred to as EGA). Of course, it is to be understood that the fiber grating of the present invention may also be selected from a carbon fiber grid, an aramid fiber grid, or a linen fiber grid or the like.

In order to further improve the performance of the repair layer, it is preferred that the fiber grid has a thickness of 0.1 to 0.5 cm. The transverse spacing of the fiber grids is 2 to 10 cm; the longitudinal spacing of the fiber grids is 2 to 10 cm. Of course, it can be understood that those skilled in the art can also select fiber gratings with other specifications according to actual conditions.

In the present invention, the fiber grid 140 is partially embedded in the first polymer mortar layer 130, that is, the fiber grid 140 is sandwiched between the first polymer mortar layer 130 and the second polymer mortar layer 150, in the fiber. In the hollowed out region of the grid 140, the first polymeric mortar layer 130 is in direct contact with the surface of the second polymeric mortar layer 150.

The second polymer mortar layer 150 is coated on the first polymer mortar layer 130 and the fiber grid 140. The second polymer mortar layer 150 is formed by solidification of the second polymer mortar. The primary role of the second polymer mortar layer 150 is to protect the fiber grid 140 and to further increase the thickness of the polymer mortar in the repair layer, further enhancing the strength of the repair layer. The thickness of the second polymer mortar layer 150 is not particularly limited in the present invention, and those skilled in the art can select a suitable thickness according to actual conditions. Preferably, the second polymer mortar layer has a thickness of from 1 to 3 cm. This makes it easier to form the second polymer mortar layer 130 in the area such as the bevel or the top surface, and can effectively prevent the casting or peeling of the second polymer mortar during the construction.

In the present embodiment, the thickness of the first polymer mortar layer 130 is less than the thickness of the second polymer mortar layer 150. This can be more conducive to construction and help to improve the overall reinforcement strength. Of course, it can be understood that the thickness of the first polymer mortar layer 130 can also be equal to or greater than the thickness of the second polymer mortar layer 150. Those skilled in the art can also independently select the thickness of the first polymer mortar layer 130 and the second polymer mortar layer 150 according to actual conditions.

In this embodiment, the first polymer mortar layer 130 and the second polymer mortar layer 150 are formed of the same material, that is, the first polymer mortar and the second polymer in the first polymer mortar layer 130. The second polymer mortar in the composite mortar layer 150 is the same polymer mortar. Of course, it can be understood that the first polymer mortar layer 130 and the second polymer mortar layer 150 are formed of different materials.

Referring to Figures 3-4, Figures 3-4 are schematic views of another embodiment of the present invention. The building reinforcement structure 100 of the present embodiment is basically the same as the previous embodiment. Unlike the previous embodiment, the surface of the fiber grating 140 is further provided with a glue layer 9 to form a composite grid 140'. Here, for the sake of convenience of representation, only a cross-sectional view at one of the grid bars is shown in FIG.

It can be understood that the glue layer 9 is only attached to the fiber grid 140, but does not affect the general shape of the fiber grid 140. The general shape of the composite grid 140' is substantially identical to the fiber grid 140 of the unbonded layer.

Wherein the glue layer is formed from a fiber grating modification composition of the following composition:

Among them, the adhesive mainly plays a role in the fiber grating modifying composition. Preferably, the adhesive is selected from the group consisting of low viscosity, low shrinkage, heat and humidity resistance, ageing resistance and good mechanical properties. More preferably, the adhesive is selected from the group consisting of epoxy resins, acrylic resins, polyvinyl acetate, phenolic resins or polyurethanes.

Among them, the main role of talc powder is to improve lubrication performance. Talc has good lubricity and also reduces material costs.

Among them, fly ash is used as an additive in the fiber grating modifying composition, and the fly ash can improve the performance of the fiber grating modifying composition. Fly ash can be selected from various types of fly ash on the market.

Among them, the main role of sand is to reduce the shrinkage rate and increase the roughness. More preferably, the mesh number of the sand grains is 10 to 100 mesh. This can further enhance the performance of the fiber grating modifying composition.

Among them, the main role of the coupling agent is to improve the interface adhesion and improve the mechanical properties. Preferably, the coupling agent is selected from a silane coupling agent or a titanate coupling agent.

Among them, the main role of cement is to improve the fiber grating modified composition with cement, concrete, sand Synergism between the main materials such as pulp. Preferably, the cement is selected from Portland cement, which is effective in reducing material costs. Specifically, the Portland cement may be selected from ordinary Portland cement, pozzolanic Portland cement, or composite Portland cement. Of course, it will be appreciated that the cement may also be selected from other cements.

Preferably, the fiber grating modifying composition comprises the following components:

The preparation method of the composite grid is briefly described below.

According to the proportion of the components, the raw materials in the fiber grating modification composition are uniformly mixed to form a glue liquid, and then the glue liquid is evenly coated on the surface of the fiber grid. After the glue liquid is dried, a composite grid is obtained.

The fiber grating modifying composition can enter the inside of the fiber grating, that is, the gap between the fibers, and the fiber grating modifying composition can be compatible with the host material such as the polymer mortar, thereby making the fiber The grid and the host material such as polymer mortar produce greater adhesion, forming a good synergistic effect; and then improving the bonding force between the fiber grid and the host material such as polymer mortar. Further, it is advantageous for the performance of the fiber grating.

Preferably, the quality of the glue layer per square meter of fiber grid 8 is from 100 to 300 g. This allows the performance of the composite grid 140' to be better.

The above-mentioned building reinforcement structure adopts a method of sandwiching the fiber grating between two layers of polymer mortar layers, and the thickness of the repair layer is small, thereby improving the utilization of the structure space; and effectively controlling the space utilization without affecting the use of the structure space The crack is generated and expanded to prevent the repair layer from peeling off, enhance the impact resistance, obtain a good repair and reinforcement effect, and improve the service life of the building. At the same time, it also has the advantages of corrosion resistance, impact resistance and fire resistance.

The invention also provides a method of building reinforcement.

A building reinforcement method includes the following steps:

Applying an interface agent to the surface of the building base;

Wherein, before the step of applying the interface agent, it is preferred to further include surface treatment of the building substrate. Surface treatment can remove mud, aquatic organisms, loose concrete and other impurities on the surface of the building base, which can enhance the bonding force between the building base and the repair layer. The surface treatment of the present invention includes, but is not limited to, a sanding treatment, or a rinsing treatment. Preferably, the building substrate is first properly sanded and then the polished surface is rinsed with a high pressure water jet.

The step of applying the interface agent is specifically: spraying, rolling or brushing the interface agent on the surface of the building substrate after the surface treatment.

Wherein, the first polymer mortar is applied by spraying or smearing. Of course, it can be understood that the coating method is not limited thereto, and may be other coating methods.

Wherein, the fiber grating may be directly embedded in the first polymer mortar, or may be modified before the embedding, that is, the adhesive layer may be attached to the surface of the fiber grating before embedding; The glue layer is formed from a fiber grating modification composition of the following composition:

Wherein, the fiber grating is preferably inserted in such a manner that the fiber grating is smeared with a spatula so that the fiber grating portion is embedded in the first polymer mortar.

In order to further improve the reinforcing performance, it is preferable that the repair layer can also be maintained. Specifically, water may be sprayed on the second polymer mortar layer at a low pressure according to weather and environmental conditions to keep the surface moist for a period of time.

In a preferred embodiment, the building reinforcement method is as follows:

First properly sand the building base and then rinse the polished surface with a high pressure water jet. After the surface of the building substrate is dried, the interface agent is sprayed onto the surface of the building substrate. When the interface agent is about to dry, apply the first polymer mortar on the interface agent; lay a suitable size fiber grating on the wet first polymer mortar, and wipe the fiber grid with a spatula to make the fiber grating The lower part is trapped in the first polymer mortar. After the surface of the first polymer mortar is dried, a second polymer mortar is applied, and then the second polymer mortar is allowed to solidify.

The above-mentioned building reinforcement method is simple and easy to operate, convenient in construction, and can quickly repair and strengthen the building. The formed building reinforcement structure has a small thickness of the repair layer, which improves the utilization of the structure space; and improves the reinforcement strength. It also has the advantages of corrosion resistance, peeling resistance, impact resistance and fire resistance, as well as extending the life of the building.

The technical features of the above embodiments may be arbitrarily combined. For the sake of brevity of description, all possible combinations of the technical features in the above embodiments are not described. However, as long as there is no contradiction in the combination of these technical features, It is considered to be the range described in this specification.

The above embodiments are merely illustrative of several embodiments of the present invention, and the description thereof is more specific and detailed, but is not to be construed as limiting the scope of the invention. It should be noted that a number of variations and modifications may be made by those skilled in the art without departing from the spirit and scope of the invention. Therefore, the scope of the invention should be determined by the appended claims.

Claims

A building reinforcement structure, comprising:

Building base;

An interface agent layer covering the surface of the building base;

a first polymer mortar layer overlying the interface agent layer;

a fiber grating partially embedded in the first polymer mortar layer;

And a second polymer mortar layer overlying the first polymer mortar layer and the fiber grid.
The building reinforcement structure according to claim 1, wherein a surface of the fiber grating is further provided with a glue layer; and the glue layer is formed of a fiber grating modification composition of the following composition:
The building reinforcement structure according to claim 1 or 2, wherein the first polymer mortar layer has a thickness of 1 to 2 cm.
The building reinforcement structure according to claim 1 or 2, wherein the second polymer mortar layer has a thickness of 1 to 3 cm.
The building reinforcement structure according to claim 1 or 2, wherein the interface agent layer has a thickness of 0.01 to 1 mm.
The building reinforcement structure according to claim 1 or 2, wherein the fiber grating is a carbon fiber grating, a glass fiber grating, an aramid fiber grating, or a linen fiber grating.
A method for reinforcing a building, comprising the steps of:

Applying an interface agent to the surface of the building base;

Coating a first polymer mortar on the interface agent, and embedding the fiber grating portion into the first polymer mortar;

A second polymer mortar is applied to the surface of the first polymeric mortar and to the fiber grid.
The building reinforcement method according to claim 7, wherein before the step of embedding the fiber grating portion in the first polymer mortar, the method further comprises attaching a glue layer on the surface of the fiber grating The gum layer is formed from a fiber grating modifying composition of the following composition:
The method of reinforcing a building according to claim 7 or 8, wherein the first polymer mortar is applied by spraying or painting.
The method of reinforcing a building according to claim 7 or 8, wherein the fiber grating is embedded in a manner of wiping the fiber grating with a spatula.