Jintongbao Technology Group Co. , Ltd.
Bridge Bearing Grout

Bridge Bearing Grout

The JTB Bridge Bearing Grout is used to fill gaps between the bridge bearing and the pier and abutments, forming a solid grout layer that ensures the stability and safety of the bridge bearing. The performance indicators meet the technical requirements of the "Interim Technical Conditions for Pot Rubber Bearings of Passenger Dedicated Line Bridges" - "Interim Technical Conditions for Cylindrical Steel Bearings of Passenger Dedicated Line Bridges".

Product Features

• High flowability, non-segregating, non-bleeding
• Early & high strength, high compressive strength
• Non-shrink, slight expansion
• Applicable under low and sub-zero temperature conditions
• High durability
• Self-compacting

Applications Scenarios

• Grouting for columns, piles & rock foundations
• Grouting for rail pads, base slabs & supports in railways, highways, bridges, tunnels

Construction Craft

• Surface preparation and Formwork: Scabble the concrete substrate surface or apply Jintongbao Concrete Interface Bonding Agent for surface treatment. Remove rust scale, oil stains, and other debris from the components. Twenty-four hours before placing Jintongbao Bridge Bearing Grout, moisten the concrete substrate surface. No standing water shall be present. Erect formwork tightly to prevent grout leakage.
• Mixing and Construction: Add water at 12% of the weight of Jintongbao Bridge Bearing Grout and mix until uniform. When grouting, pour from one side wherever possible to facilitate the expulsion of air between the base plate and the concrete substrate. Once grouting begins, it must proceed continuously without interruption.
• Curing: Cover the placed Jintongbao Bridge Bearing Grout with wet straw bags or cloth and water-cure 2–6 times per day. Alternatively, apply Jintongbao Curing Compound in a single coat to form a film. Curing temperature shall be above 15°C, and the curing period shall be 7 days. If the site temperature is low, the curing period may be extended accordingly. Formwork removal shall be carried out 24 hours after placement is completed. Curing shall continue after formwork removal.

Packaging and Storage

Packaging specification: Packed in composite bags, each bag contains 50 ± 1 kg or 25 ± 1 kg. 

Storage: Protect from moisture and direct sunlight during transportation and storage.

Shelf life: 6 months in unopened condition. The product may be transported as general cargo.

Safety Specifications

Wear a dust mask, safety goggles, and protective gloves during application;
In case of skin or eye contact, rinse immediately with plenty of clean water. Seek medical treatment promptly if symptoms are severe.

Key Technical Indicators
Inspection items Performance indicators - Type I Performance indicators - Type II Performance indicators - Type III
Setting time (min) Initial ≥30
Final ≤180
Bleeding rate (%) 0
Fluidity (mm) Initial ≥320
30min ≥240
Compressive strength (MPa) 2h Specia1
requirements
≥20
8h ≥20 ≥25
12h ≥25
24h ≥40
28d ≥50
56d Not reduced
90d Not reduced
Flexural strength (MPa) 24h ≥10 ≥10 ≥10
28h Not reduced ≥12 Not reduced
56d Not reduced ≥12 Not reduced
Elastic modulus (GPa) 28d ≥30
Expansion rate (%) 28d 0.02-0.1
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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