Bentonite Grout Plant for Borehole Injection
The Bentonite Grout Plant for Borehole Injection integrates a 500L high-shear grout mixer, a 700L agitator and a grout pump with approximately 100L/min output and 0-50 bar pressure. It is suitable for bentonite slurry, cement grout and cement-bentonite mixtures used in micropile construction, foundation reinforcement, soil stabilization, anchoring, tunneling and geological borehole injection.
Bentonite Grout Plant for Borehole Injection
The Bentonite Grout Plant for Borehole Injection is an integrated mixing, agitating and pumping system designed for preparing and injecting bentonite slurry, cement grout and other fluid grouting materials into drilled boreholes. It combines a high-efficiency grout mixer, a large-capacity agitator and a reliable grout pump in one compact unit, allowing contractors to complete continuous grout production and borehole injection with fewer auxiliary machines.
This grouting plant is suitable for micropile foundations, ground stabilization, soil improvement, geological drilling, anchoring, tunnel construction, dam reinforcement and other underground grouting projects. The system can produce a uniform and stable grout mixture while maintaining continuous circulation before the grout is delivered to the injection point.
Integrated Grout Mixing and Pumping System
The grout plant is equipped with a 300-liter grout mixer for rapid preparation of bentonite or cement-based slurry. The high-shear mixing action helps break down dry material particles and distributes them evenly throughout the liquid, reducing lumps and improving grout consistency.
After mixing, the grout is discharged into the 500-liter agitator tank. The agitator continuously stirs the material to prevent sedimentation, separation and premature setting. This allows the grouting pump to receive a consistent supply of homogeneous slurry during borehole injection work.
The integrated grout pump provides an output of approximately 100 liters per minute, with a working pressure range of 25–28 bar. This combination of flow and pressure makes the unit suitable for medium-pressure injection into boreholes, micropiles, anchor holes and foundation grouting points.
Designed for Borehole Grouting Applications
During borehole injection, the grout must remain fluid, uniform and stable throughout the entire mixing and pumping process. An unstable slurry may settle inside the tank, block the pipeline or create uneven filling inside the drilled hole.
The bentonite mixing and grouting plant is designed to provide continuous preparation and delivery of grout. While one batch is being pumped from the agitator, the next batch can be prepared in the mixer. This continuous operating process reduces waiting time and improves productivity on construction sites.
The equipment can be used for injecting grout into:
- Micropile boreholes
- Anchor drilling holes
- Geological exploration boreholes
- Foundation reinforcement holes
- Tunnel and mining injection points
- Dam and embankment grouting holes
- Soil stabilization boreholes
- Water-sealing and void-filling holes
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bentonite grouting mixing system for tunneling
Stable Bentonite Slurry Preparation
Bentonite is widely used in borehole injection because of its suspension, sealing and water-retention properties. However, bentonite powder requires sufficient mixing energy to become fully dispersed in water.
The high-shear mixer creates strong turbulence inside the mixing chamber, helping the bentonite particles hydrate more evenly. Compared with traditional low-speed mixing methods, the colloidal mixing process can produce a smoother and more stable slurry in a shorter time.
The finished bentonite grout can then be stored temporarily in the agitator without significant settlement. Continuous agitation maintains the slurry condition until it is pumped into the borehole.
Suitable for Bentonite and Cement Grout
Although the unit is commonly described as a bentonite grout plant, it can also be used for preparing various pumpable grouting materials, depending on the project formulation.
Suitable materials may include:
- Bentonite slurry
- Cement grout
- Cement-bentonite grout
- Water-cement slurry
- Fine cement grout
- Clay-based injection slurry
- Selected chemical grout mixtures
- Other fluid and low-viscosity grouting materials
The actual pumping capacity and pressure may vary according to grout viscosity, particle size, water-cement ratio, pipeline diameter and injection distance.
Benefits of the Bentonite Grout Plant
Continuous Grout Production
The separate mixer and agitator arrangement supports continuous operation. A new batch can be mixed while the previous batch is being pumped.
Uniform Grout Quality
High-efficiency mixing helps produce consistent grout with fewer unmixed particles and less material separation.
Reduced Sedimentation
The agitator keeps the grout moving before injection, reducing the risk of settlement inside the tank.
Compact Equipment Layout
The mixer, agitator and grout pump are installed as one complete grouting station, making transportation, installation and operation more convenient.
Suitable Flow and Pressure
A pump output of approximately 100 L/min and pressure up to 28 bar meet the requirements of many borehole, micropile and foundation grouting projects.
Flexible Project Applications
The plant can be used for foundation treatment, underground construction, geological drilling, micropile installation and water-sealing work.
Micropile and Foundation Grouting
In micropile construction, cement grout is normally injected into a drilled borehole around the reinforcement element. The quality and continuity of the grout directly affect the bond between the micropile and surrounding soil or rock.
This complete grouting station for micropile projects provides controlled grout preparation and continuous pumping. The integrated system reduces manual material handling and helps contractors maintain a more stable grouting process.
It can also be used for anchor grouting, soil nail installation, foundation underpinning and drilled shaft reinforcement.
Typical Applications
The borehole injection grout plant can be used in a wide range of civil engineering and geotechnical projects, including:
- Micropile foundation installation
- Ground improvement and soil consolidation
- Rock fissure grouting
- Tunnel water-sealing
- Foundation reinforcement
- Anchor bolt and soil nail grouting
- Dam curtain grouting
- Mining void filling
- Geological drilling support
- Diaphragm wall construction
- Slope stabilization
- Underground cavity filling
Why Choose an Integrated Grout Plant?
Using separate mixing tanks, storage tanks and pumps often requires additional pipelines, electrical connections and coordination between operators. An integrated colloidal grout mixer pump unit simplifies the entire setup.
The compact grouting station helps reduce installation time and allows the operator to control mixing, agitation and pumping from one working area. It is particularly suitable for contractors who frequently move between borehole injection points or different construction projects.
