CN112593722A

CN112593722A - Steel-bonding adhesive and steel-bonding reinforcing method for concrete column

Info

Publication number: CN112593722A
Application number: CN202011296766.0A
Authority: CN
Inventors: 胡顺昌; 罗媛媛; 杨先锋; 罗均荣; 胡明德
Original assignee: Hubei Zhongjian Changlong Construction Technology Co ltd
Current assignee: Hubei Zhongjian Changlong Construction Technology Co ltd
Priority date: 2020-11-18
Filing date: 2020-11-18
Publication date: 2021-04-02

Abstract

The invention relates to the technical field of building reinforcement, and discloses a concrete column bonded steel reinforcement method and bonded steel glue used in a matching way. Meanwhile, the method has the advantages of no burden on space and high economic benefit.

Description

Steel-bonding adhesive and steel-bonding reinforcing method for concrete column

Technical Field

The invention relates to the technical field of building reinforcement, in particular to a steel-bonding adhesive and a steel-bonding reinforcement method for a concrete column.

Background

In buildings, most of the buildings are now concrete structures. When the service life of the concrete structure reaches a certain time, the concrete structure will be corroded, and the steel bars will be corroded, so that the service life and the safety of the building are seriously influenced. The most part of post structure also is concrete structure, can be through consolidating to the post increase of service life, guarantee safety, glues the steel reinforcement and not only can not cause the burden in the space, and economic benefits is high moreover.

Disclosure of Invention

Technical problem to be solved

The embodiment of the invention provides a concrete column steel bonding reinforcing method and steel bonding glue used in a matched mode, and aims to solve the problem that after the service life of an existing building reaches a certain time, the concrete column is corroded, a steel bar is also corroded, and the safety of the building is seriously affected.

Disclosure of the invention

The embodiment of the invention provides a steel-bonding adhesive, which comprises a component A and a component B, wherein the component A comprises the following components in parts by mass: 100 parts of bisphenol A epoxy resin, 7-17 parts of a toughening agent, 5-10 parts of a reactive diluent and 100-180 parts of a filler; the component B comprises the following components in parts by mass: 15-30 parts of a first curing agent, 20-35 parts of a second curing agent, 1-5 parts of an accelerator, 1-5 parts of a coupling agent, 1-3 parts of a thixotropic agent and 30-50 parts of a filler.

Preferably, the mass ratio of the component A to the component B is 2: 1.

Preferably, the bisphenol A epoxy resin is a glycidyl ether polymer material prepared by condensation polymerization of diphenol propane and epoxy chloropropane in an alkaline medium.

A concrete column bonded steel reinforcing method comprises the following steps:

the method comprises the following steps: processing the sticking surface; processing the surface of the concrete column into a smooth surface capable of carrying out steel bonding reinforcement operation;

step two: drilling a bolt hole; drilling bolt holes at proper positions on the reinforcing member for fixing expansion bolts;

step three: preparing steel adhesive glue; preparing the steel-bonding adhesive according to any one of claims 1 to 3;

step four: gluing and pasting; bonding the reinforced steel plate to the bonding surface treated in the step one by using the steel bonding glue prepared in the step three;

step five: quality inspection; the reinforced steel plate was checked for adhesion.

Preferably, the processing operation of the bonding surface in the first step includes the following two steps: a) chiseling off the powder layer on the cylindrical surface of the concrete; b) and (4) carrying out rough and rust removal treatment on the bonding surface of the reinforced steel plate by using an angle grinder until the bonding surface is polished to be glossy.

Preferably, in step five, the quality inspection flow for the general member is as follows: and (3) tapping the pasting steel plate by using a small hammer, judging the pasting effect by a technician from a sound, and if the effective bonding area of the anchoring area is less than 90 percent and the effective bonding area of the non-anchoring area is less than 70 percent, peeling off the steel plate and pasting again.

Preferably, in step five, the quality inspection process for the important components is as follows: and (4) loading the materials to a standard value of a normal load in a grading manner, and carrying out accurate evaluation through load inspection.

Preferably, after step five, maintenance is required: and (3) plastering and protecting the reinforced steel plate by using M15 cement mortar with the thickness of 20mm, or coating antirust paint to prevent the reinforced steel plate from being corroded.

(III) advantageous effects

According to the concrete column bonded steel reinforcing method and the bonded steel glue used in cooperation with the method, the bonded steel reinforcement of the concrete column is achieved through the steps of bonding surface treatment, bolt hole drilling, bonded steel glue preparation, glue coating, bonding, quality inspection and the like, and the problems that after the service life of an existing building reaches a certain time, the concrete column is corroded, and the steel bars are corroded so that the building safety is seriously affected are solved. Meanwhile, the method has the advantages of no burden on space and high economic benefit.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to relevant data, and it is obvious that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the embodiments of the present invention, it should be noted that the terms "first", "second" and "third" are used for the sake of clarity in describing the numbering of the components of the product and do not represent any substantial difference, unless explicitly stated or limited otherwise. Specific meanings of the above terms in the embodiments of the present invention can be understood by those of ordinary skill in the art according to specific situations.

It is to be understood that, unless otherwise expressly specified or limited, the term "coupled" is used broadly, and may, for example, refer to directly coupled devices or indirectly coupled devices through intervening media. Specific meanings of the above terms in the embodiments of the invention will be understood to those of ordinary skill in the art in specific cases.

The steel bonding adhesive comprises the following components:

the steel bonding adhesive comprises a component A and a component B, wherein the component A comprises the following components in parts by mass: 100 parts of bisphenol A epoxy resin, 7-17 parts of a toughening agent, 5-10 parts of a reactive diluent and 100-180 parts of a filler; the component B comprises the following components in parts by mass: 15-30 parts of a first curing agent, 20-35 parts of a second curing agent, 1-5 parts of an accelerator, 1-5 parts of a coupling agent, 1-3 parts of a thixotropic agent and 30-50 parts of a filler. Wherein the mass ratio of the component A to the component B is 2: 1.

The complete process of column bonded steel reinforcement is as follows:

1. treatment of adhesive surfaces

(1) Chiseling a powder decoration layer on the concrete surface to remove oil dirt and dirt, polishing by using an angle grinder to remove a surface layer with the thickness of 1-2mm, repairing and leveling a larger dent by using leveling glue, blowing floating dust by using compressed air after polishing, wiping the surface by using cotton cloth to be stained with acetone, and keeping the pasted surface after being completely dried for later use.

(2) And (3) carrying out rough and rust removal treatment on the bonding surface of the steel plate by using an angle grinder until the bonding surface is polished to be glossy, and cleaning the bonding surface before use only by wiping with dry cloth. Otherwise, the surface of the fabric can be wiped clean by using cotton cloth dipped with acetone, and the fabric is kept for later use after being completely dried.

2. Drilling bolt hole

The compression fixation can adopt expansion bolts, and the expansion bolts are required to be drilled and fixed at proper positions on the reinforcing member.

3. Adhesive formulation

The building structure adhesive is A, B two components, and is prepared by mixing clean container (plastic or metal basin without oil stain, water and impurities) and weighing apparatus according to the mixing ratio of specification, and stirring with stirrer for 5-10 min until the color is uniform. It is preferable to stir the mixture in the same direction to avoid air bubbles from being formed by air mixing, and it is preferable to ventilate the place where the mixture is placed.

4. Glue coating and sticking

After the adhesive is prepared, the adhesive is coated on the surface of a treated steel plate (or the surface of concrete) by a putty knife, the section of the adhesive is preferably triangular, the middle of the adhesive is about 3mm thick, the edge of the adhesive is about 1 mm thick, then the steel plate is adhered on the surface of the concrete, a prepared fixing and pressurizing system is used for fixing, and proper pressurization is carried out until the adhesive is just extruded from the edge seam of the steel plate.

5. Examination of

(1) The sticking steel plate can be tapped by a small hammer, the sticking effect can be judged from the sound, and the ultrasonic instrument can also be used for detection. If the effective bonding area of the anchoring area is less than 90 percent and the effective bonding area of the non-anchoring area is less than 70 percent, the steel plate is peeled off and bonded again.

(2) The load inspection can also be adopted for important components, generally, the standard value loaded to the normal load in a grading way is adopted, the detection result is more intuitive and reliable, but the cost is higher, and the time consumption is longer. A jack or a balance weight (common sand bags and bricks), a dial indicator, a crack microscope and a weighing apparatus are needed.

6. Maintenance

After the steel plate is reinforced, M15 cement mortar with the thickness of 20mm is preferably used for surface coating protection, and antirust paint can also be coated for protection, so that the corrosion of the steel is avoided.

Attention to steel sticking and reinforcement of columns

1. The quality of the cementing agent (steel-bonding adhesive) is the key of the success of steel-bonding reinforcement, so the quality of the cementing agent must be strictly controlled, the cementing agent must have high strength, good durability and certain elasticity, and the strength of the cementing agent must be greater than that of a corresponding reinforced member.

2. In order to ensure that the steel plate is firmly and effectively adhered, the width and the thickness of the steel plate need to be controlled.

3. When the adhesive is pasted, a spatula is used for simultaneously smearing on the surface of the treated concrete and a steel plate, the thickness is 1-3mm, the thickness of the middle part is preferably thin, no hollowing is strictly ensured after the steel plate is pasted, otherwise, the steel plate is peeled off, the adhesive is supplemented, and the adhesive is pasted again.

4. And (4) taking the steel plate anticorrosion treatment measures after construction into consideration.

Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims

1. The steel-sticking glue is characterized in that: the paint comprises a component A and a component B, wherein the component A comprises the following components in parts by mass: 100 parts of bisphenol A epoxy resin, 7-17 parts of a toughening agent, 5-10 parts of a reactive diluent and 100-180 parts of a filler; the component B comprises the following components in parts by mass: 15-30 parts of a first curing agent, 20-35 parts of a second curing agent, 1-5 parts of an accelerator, 1-5 parts of a coupling agent, 1-3 parts of a thixotropic agent and 30-50 parts of a filler.

2. The steel-bonding adhesive according to claim 1, wherein the mass ratio of the component A to the component B is 2: 1.

3. The steel-bonding adhesive according to claim 1 or 2, wherein the bisphenol-A epoxy resin is a glycidyl ether polymer material prepared by condensation polymerization of diphenolic propane and epichlorohydrin in an alkaline medium.

4. A concrete column bonded steel reinforcing method is characterized by comprising the following steps:

5. The concrete column bonded steel reinforcement method according to claim 4, wherein the bonding surface treatment operation of the first step comprises the following two steps: a) chiseling off the powder layer on the cylindrical surface of the concrete; b) and (4) carrying out rough and rust removal treatment on the bonding surface of the reinforced steel plate by using an angle grinder until the bonding surface is polished to be glossy.

6. The concrete column bonded steel reinforcement method according to claim 4, wherein in the fifth step, the quality inspection process for general members is as follows: and (3) tapping the pasting steel plate by using a small hammer, judging the pasting effect by a technician from a sound, and if the effective bonding area of the anchoring area is less than 90 percent and the effective bonding area of the non-anchoring area is less than 70 percent, stripping the steel plate and pasting again.

7. The concrete column bonded steel reinforcement method according to claim 4, wherein in the fifth step, the quality inspection process for important components is as follows: and (4) loading the materials to a standard value of a normal load in a grading manner, and carrying out accurate evaluation through load inspection.

8. The concrete column bonded steel reinforcement method according to claim 4, wherein after the fifth step, maintenance is required: and (3) plastering and protecting the reinforced steel plate by using M15 cement mortar with the thickness of 20mm, or coating antirust paint to prevent the reinforced steel plate from being corroded.