LMA850-1500A/E High speed grout mixing machine adopts an integrated structural design, unifying the mixing host, mixing device, and booster pump on a shared base. The overall layout is compact and rational, making transportation and transfer very convenient. Its core high-speed vortex mixing technology achieves efficient and uniform mixing, promoting rapid fusion of water and cement to produce a homogeneous grout material.

LMA850-1500A/E High Speed Grout Mixing Machine is a versatile, high-production slurry preparation system best suited for cement and bentonite grout applications in micropiling, diaphragm walls, tunnel grouting, dam foundation treatment, and general infrastructure construction. Its integrated design, rapid mixing cycle (1–2 min), continuous operation capability, and robust pump configuration make it particularly valuable in demanding underground engineering environments where consistent, high-quality grout supply is critical. LMA850-1500A/E High Speed Grout Mixing Machine is a high-efficiency, integrated slurry preparation system that combines a mixer, agitator, and booster pump on a single skid-mounted base frame. Based on its design parameters and technical specifications, here is a detailed overview of its primary applications:
1. Cement Slurry Preparation & Grouting
The core function of the LMA850-1500A/E is the rapid preparation of cement-based grout. Its high-speed vortex mixing technology (mixer speed up to 1800 rpm) ensures that water and cement blend within just 1–2 minutes, forming a homogeneous, bubble-free slurry with a water-to-cement (W/C) ratio adjustable between 0.5–1. This makes it ideal for:
Pressure grouting in foundation treatment
Void filling behind tunnel linings
Seepage control in dam foundations
2. Bentonite Slurry & Colloidal Grout Mixing
The machine is specifically designed to handle bentonite-cement colloidal grout, where water, cement, and bentonite are mixed through high-speed vortex action. This is widely used in:
Slurry walls (diaphragm walls) for deep excavation support
Cut-off walls for groundwater containment
Underground continuous wall construction
The downstream 1500L agitator tank ensures continuous suspension of the slurry, preventing sedimentation and air entrapment before pumping.
3. Micropile Grouting Applications
The LMA850-1500A/E is specially suited for micropile grouting operations. Micropiles require fine, stable grout that can be injected under pressure into small-diameter drilled holes. Key advantages include:
Fine slurry consistency achievable through precise W/C ratio control
Production capacity of 10–14 m³/h, supporting continuous micropile campaigns
Max pump flow rate of 1200 L/min @ 3 bar, with a booster pump delivering 700 L/min at 1 bar for steady transfer
4. Infrastructure & Construction Projects
The equipment finds extensive use across both surface and underground engineering projects, including:
Sector Typical Applications
Highway: Roadbed stabilization, void filling, anchor grouting
Railway: Tunnel boring grouting, track bed reinforcement
Hydropower: Dam foundation grouting, seepage sealing, gallery support
Building Construction: Pile foundation grouting, basement waterproofing
Mining: Ground reinforcement, backfill grouting, shaft lining
5. Continuous Mixing Operations
One of the standout features of the LMA850-1500A/E is its ability to provide continuous mixing operation. The system uses a butterfly valve to switch between the mixer (850L) and the agitator (1500L):
Mixer tank: rapid high-speed mixing of raw materials
Agitator tank: slow-speed (39 rpm) stirring to keep the finished grout in suspension, remove air bubbles, and prevent settling
This dual-tank design allows uninterrupted grout supply to downstream pumping equipment

Features of LMA850-1500A/E High speed grout mixing machine:
1. Compact structure.
2. The proportion of materials in the formula can be adjusted freely.
3. Simple operation and easy maintenance.
4. Less spare parts ensure low maintenance costs.
5. It is equipped with an automatic pulping function.
6. High-speed vortex mixer ensures mixing quickly and evenly.

Improvements compared to previous pulpers:
1. Direct connection to the centrifugal pump reduces vulnerable parts and lowers the failure rate.
2. Addition of an auxiliary impeller to the pulper results in more efficient and uniform pulping.
3. Addition of a boost pump.