Jintongbao Technology Group Co. , Ltd.
Rebar Coupler Grout

Rebar Coupler Grout

JTB Rebar Coupler Grout is a cement-based, pre-blended dry mix composed of cement, fine aggregates, and specialized concrete admixtures. On site, it requires only the addition of water to produce a self-leveling slurry with excellent flowability.

Product Features

• High flowability
• Plastic expansion
• Post-setting expansion
• Early & high strength
• Easy application

Applications Scenarios

• Prefabricated residential & industrial housing: connection of columns, shear walls to foundations
• Secondary grouting for large equipment foundations
• Secondary grouting for high-rise steel structure column bases
• Other applications requiring high strength & good flowability

Construction Craft

• Surface preparation: Clean the construction surface and remove loose dust, oil stains, etc. from the base surface. Manual or mechanical roughening (or application of interface agent) shall be carried out. All construction surfaces must be solid and free of standing water.
• Grouting preparation: Check whether the grouting holes and exhaust holes are blocked. If they are blocked, they need to be cleared first; connect the grouting pipe and prepare the plug.
• Mixing: Weigh the Rebar Coupler Grout. The weight of water should be 12% of the material. Stir thoroughly for 3 minutes. It is recommended to use mechanical mixing.
• Grouting: Manual or mechanical grouting is adopted. Grouting starts from one end and flows out from the other end, then the grouting port and the air outlet are closed.
• Note: The grouting area must not be disturbed within 24 hours after grouting. Within 3 days after grouting and pressing, the temperature of the beam body and the environment must not be lower than 5℃, and the temperature of the slurry should be between 5℃ and 30℃. Otherwise, measures should be taken to meet the requirements.

Packaging and Storage

Packaging specification: Packed in lined plastic film kraft paper bags, net weight 25 kg per bag or 50 kg per bag.

Storage: Store in a dry and well-ventilated indoor area.

Shelf life: 6 months under the above conditions. If it exceeds the storage period, it should be inspected and found qualified before use.

Safety Specifications

The product contains chemical ingredients that can irritate the eyes and skin. Please wear the necessary protective gear during construction. In case of accidental eye contact, flush immediately with plenty of clean water and seek medical attention promptly.

Key Technical Indicators
Project Standard indicators Detection value
Setting time Initial condensation ≥5 6
Final condensation ≤24 16
Fluidity Initial fluidity 10-17 15
30min flow rate 10-20 18
60min flow rate 10-25 22
Bleeding rate 24h free bleeding rate 0 0
3h bleeding rate between steel wires 0 0
Compressive strength 3d ≥20 25
7d ≥40 48
28d ≥60 63
Flexural strength 3d ≥5 6
7d ≥6 7.5
28d ≥10 11
Pressure bleeding rate When the vertical height of the channel is ≤1.8 meters (0.22MPa) ≤2.0 1.3
When the vertical height of the channel is greater than 1.8 meters (0.36MPa) ≤2.0 1.3
Free expansion rate 3h 0-2 0.16
24h 0-3 0.25
The corrosive effect on steel bars No rust No rust
Construction Gallery

JTB are committed to providing customers in all sectors with valuable products and
solutions that offer convenience and efficiency.

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About
Jintongbao Technology Group Co. , Ltd.
Jintongbao Technology Group Co., Ltd. is a service provider of reinforcement system solutions integrating R&D, production, sales and construction. Since its establishment, the company has been deeply engaged in the field of reinforcement.
Currently, it has three large-scale production bases in Zhenjiang, Jiangsu Province, Jinhua, Zhejiang Province, and Dongguan, Guangdong Province, with a total production capacity of over 500,000 tons. Among them, the factory in Zhenjiang, Jiangsu Province, holds an important position in the company's production system. The factory covers a vast area and has standardized, modern production facilities. The large-scale production layout enables it to have a strong capacity reserve, and its annual production capacity ranks among the top in the company's three major production bases. This enables the Zhenjiang factory to achieve large-scale, continuous production of grouting materials and other products and to respond quickly to large-scale supply demands. Meanwhile, we have a sales network covering the whole country as well as some countries and regions in Southeast Asia. We can ensure the convenience and efficiency of providing valuable products and solutions for customers in various fields, such as urban renewal, airports, Bridges and tunnels, waterproofing and anti-corrosion, wind power and nuclear power, etc.
Our company has always adhered to taking technological innovation as its core competitiveness and attaches great importance to and supports technological innovation.  Our R&D center is equipped with advanced experimental equipment and R&D tools, providing a solid hardware foundation for innovative work. Meanwhile, the R&D center boasts a high-level R&D team. As an industry benchmark leader, we attach great importance to industry innovation and were the 1st to propose the concept of "from reinforcement to pre-reinforcement". Actively leverage its industry experience and technological advantages to assist in the formulation and introduction of new standards, enabling it to better serve the industry and promote its healthy and sound development.
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