Jintongbao Technology Group Co. , Ltd.
Gravity Grouting Mortar

Gravity Grouting Mortar

JTB Gravity Grouting Mortar is a self-leveling filling mortar composed of high-quality cement, selected aggregates, imported polymer compounds, and additives. It can be poured quickly and automatically through gravity, accelerating construction progress.

Product Features

• Early & high strength
• High self-flow
• Self-compacting
• Suitable for winter construction
• Slight expansion
• High durability

Applications Scenarios

• Reinforcement & strengthening of concrete beam-column interfaces;
• Grouting for machinery bases & anchor bolts;
• Repair, strengthening & reinforcement of beams, slabs, columns, foundations, floors & roads;
• Embedding construction joints in subways, tunnels & underground works;
• Secondary grouting for fixing steel structures (rails, frames, columns) to foundations

Construction Craft

• Surface preparation: Clean the grouting area by removing surface dust, grease, and loose material. Thoroughly pre-wet the concrete surface in advance.
• Formwork/Shuttering: Erect the formwork and seal the joints with cement (sand) mortar or plastic tape to ensure no water leakage or grout seepage.
Mixing Ratio and Procedure: Add water at 13–15% of the weight of Jintongbao Gravity Grouting Mortar and mix. (Mechanical mixing: 2–3 minutes; manual mixing: at least 5 minutes.)
• Application: Pour the uniformly mixed Jintongbao Gravity Grouting Mortar into the grouting area from one direction. Use bamboo strips or steel rods to guide the flow if necessary. Moderate vibration or gentle tapping of the formwork is permitted.
• Curing: Immediately after initial setting, apply curing agent by spraying, or cover with plastic film and then overlay with straw mats or quilts. Maintain moist curing for 7 days.
• Usage Temperature: -10°C to 40°C. The addition of any admixtures or additives to the grouting material is strictly prohibited.
Reference Consumption: Calculate the actual usage based on 2.2–2.4 tonnes per cubic metre.

Packaging and Storage

Packaging specification: Bagged product, 50 ± 0.5 kg per bag.

Storage: Store in a ventilated, dry place away from direct sunlight.

Shelf life: 6 months. Beyond the shelf life, the product may be used after re-inspection confirms compliance.

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
Model Compressive strength (MPa) Vertical expansion rate (%) Fluidity (mm) Slump (mm) Reinforcing bar bonding strength (MPa) Maximum aggregate particle size
1d 3d 28d Round steel Rebar
General-purpose reinforced type 20-35 45-55 55-75 ≥0.02 >300 —— ≥6 ≥13 6-8 eyes
Pebble reinforced type 20-35 40-55 55-75 ≥0.02 —— >270 ≥6 ≥13 Bean stone
Superfluid state type 15-30 27-45 55-65 ≥0.02 >320 —— ≥6 ≥13 20-38 eyes
—— 4h 1d 28d —— —— —— Operable time —— ——
Rush worker type ≥15 20-45 55-75 ≥0.02 >270 —— 20min —— 6-8 eyes

It complies with the technical indicators of the GB/T50448-2015 "Technical Specification for Application of Cement-based Grouting Materials" standard.
The relationship between formwork removal and curing time and ambient temperature:
Daily minimum temperature (°C) Demolding time (h) Curing time (h)
-10~0 96 14
0~5 72 10
5~15 48 7
≥15 24 7
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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