With the continuous development of building reinforcement, the reinforcement technology of planting bar adhesive is required to be adopted in many projects such as bridge tunnels and building construction.  Reinforcement with planting bar adhesive is a simple and effective connection and anchorage technology for concrete structures.  The reinforcing bars or screws are firmly bonded to the concrete surface with adhesives to ensure the integration of the reinforcing bars and the concrete and enhance the bearing capacity and seismic resistance of the building.  Among them, the reinforcement material - planting bar adhesive is an indispensable and important part of this technology.  Today, let me take you to have a detailed interpretation of the planting bar adhesive.

I. The Origin of Planting Bar Adhesive

According to the relevant information inquiries: In 1959, Germany began to research resin-capsule-cured mining bolts.  Since then, this technology was widely used in the construction of mines and tunnels in the 1960s and 1970s.  By the 1980s, this technology had been widely applied.

In 1992 in China, the China Association for Engineering Construction Standardization approved that the "Technical Code for Strengthening of Concrete Structures" compiled by Sichuan Institute of Building Research mentioned the preliminary concept of "planting bars".  Thus, the planting bar technology was introduced.  It was not until November 1, 2013, when the GB50367-2013 "Code for Design of Strengthening of Concrete Structures" was released that the relevant calculation methods and structures of the planting bar technology were specifically required by the national standards.

II.  The Application Range of Planting Bar Adhesive

Planting of reinforcing bars and bolts in concrete components, and fixing of dry-hanging brackets for curtain wall stones;

Reinforcement of building structures and planting of bars in frames;

Fixing of various equipment foundations, and anchorage connection between steel structures and concrete structures;

Railway, highway, bridge, water conservancy, reconstruction, expansion and reinforcement projects;

Fixing of billboards, tunnel pipelines, sound insulation boards and guardrails on elevated roads.

III.  The Types of Planting Bar Adhesive

Planting bar adhesives are divided into many types.  From the appearance, there are two common types: cartridge-type planting bar adhesive and barrel-type planting bar adhesive.  Distinguished by the raw material resin, there are epoxy resin planting bar adhesives, vinyl resin planting bar adhesives and unsaturated resin planting bar adhesives.

IV. The Construction Process Flow

The construction process flow of injection-type planting bar adhesive:

① Drill holes in the base material;

② Clean the holes thoroughly;

③ Inject the planting bar adhesive into the holes;

④ Slowly screw the reinforcing bars or screws into the holes;

⑤ Wait for the adhesive to cure;

⑥ After the curing is completed, loading can be carried out.

The construction process flow of barrel-type planting bar adhesive:

① Drilling: Use an electric drill or drilling machine to drill holes.  The size of the drill bit and the depth of the drilling should be strictly in accordance with the requirements of the design drawings;

② Hole cleaning: Before implanting the reinforcing bars or screws, first brush the holes with a brush, and then blow the holes with an air compressor or air pump to blow out the dust.  Repeat the brushing and blowing of the holes three times;

③ Glue mixing: Mix the barrel-type planting bar adhesive according to the relevant mixing ratio and stir evenly;

④ Glue injection: Dip the reinforcing bars or screws full of glue and send the glue into the holes until it reaches 2/3 of the hole depth;

⑤ Planting bars: Slowly rotate the reinforcing bars or screws in the same direction and implant them into the holes until they touch the bottom of the holes and the adhesive overflows;

⑥ Curing: The rod body should not be touched within the initial setting time.  After the complete curing, further construction and testing can be carried out.

V. Construction Precautions

Injection-type Rebar Bonding Adhesive:

① Before implanting the rebars, thoroughly clean the drilled holes and rotate the rod body to insert it into the holes.    If there is no adhesive flowing out of the holes, the rod body must be pulled out and the adhesive injection operation must be repeated.    It is strictly prohibited to touch the rod body before it is cured.

② The adhesive in the first tube of the static mixer that is dispensed should be discarded and cannot be used.

③ The unused adhesive can be cleaned out of the dispensing nozzle and then the cap can be tightened for subsequent use.

④ During construction, protective equipment such as gloves, masks, goggles and hard hats must be worn.    If it accidentally gets on the skin or clothing.

Barrel-type Rebar Bonding Adhesive:

① Before implanting the rebars, thoroughly clean the drilled holes and rotate the rod body to insert it into the holes.    If there is no adhesive flowing out of the holes, the rod body must be pulled out and the adhesive injection operation must be repeated.    It is strictly prohibited to touch the rod body before it is cured.

② The adhesive mixing must be strictly in accordance with the corresponding mixing ratio.

③ The adhesive must be used immediately after mixing.    If there is unused adhesive in the barrel, the barrel lid can be tightened for subsequent use.

④ During construction, protective equipment such as gloves, masks, goggles and hard hats must be worn.    If it accidentally gets on the skin or clothing, it can be cleaned with acetone and a large amount of clear water.    If it is accidentally ingested or splashed into the eyes, seek medical attention immediately.

Future Development Prospects

With the saturation of existing building construction reaching the corresponding level, many old buildings need to be reinforced.    Rebar bonding adhesive reinforcement will play an increasingly important role in the field of building structure reinforcement, and its market prospects are also very broad.    Especially in China, at present, many large-scale reinforcement projects are also choosing domestic rebar bonding adhesives.    SHB-rebar bonding adhesive has the advantages of convenient construction, good durability, strong anchorage force, and can meet the design service life of 50 years.    It is a good helper for rebar bonding adhesive reinforcement!    "Implant good rebars with good adhesives and use good materials for bonding."    Shibang builds a safe framework for you!