What is an Automatic Mortar Jetting Machine?

What is an Automatic Mortar Jetting Machine?

Automatic mortar jetting machines are specialized devices designed to apply mortar or cement mixtures as a binding agent, which achieves its desired strength and durability as it hardens. These machines are commonly used in construction projects for two main applications: concrete and plastering. Different machines serve each purpose—shotcrete or gunite machines are suited for concrete applications, while plaster spraying machines are used for mortar or plastering tasks.

Automatic mortar jetting machines bring efficiency, consistency, and speed to the process of cement application, making them essential for projects requiring uniform strength and smooth finishes.

Benefits of Using Automatic Mortar Jetting Machines

1. Labor Efficiency: Automatic mortar jetting machines reduce the labor required by automating the mixing and application process, making projects quicker and less costly.
2. Consistency in Mixture: These machines provide uniform mortar mixes, ensuring that each batch is consistent in composition and quality, resulting in stronger, more durable applications.
3. Versatility in Application: They can handle various mortar types, making them suitable for bonding, leveling, reinforcement, and even decorative plastering applications.
4. Reduced Material Wastage: The controlled application minimizes excess material, reducing costs and environmental impact.
5. Enhanced Safety: With automated functions, the machines reduce manual handling, which improves safety on construction sites.

Types of Applications with Automatic Mortar Jetting Machines

Automatic mortar jetting machines are versatile and can adapt to different construction requirements, such as:

• Concrete Application: Where a robust, high-strength mix is required, typically for structural support in tunnels, retaining walls, or repair works.
• Mortar and Plastering Application: Often for creating a smooth, finished surface on walls and ceilings, enhancing aesthetics and protecting against environmental factors.

In both applications, automatic mortar jetting machines ensure efficiency and quality in the spraying process, adapting to either wet or dry methods depending on the project requirements.

Concrete Spraying Machine: Dry Process of Sprayed Concrete

When used as a concrete spraying machine, the automatic mortar jetting machine can employ the dry process of sprayed concrete, a method that uses a pre-determined dry mixture of cement and aggregate, calibrated to achieve specific compressive strengths. This dry mixture is fed into the machine without water initially.

• Air Propulsion: The dry mixture is propelled through a hose by high-velocity air, maintaining steady, consistent flow.
• Atomized Water Application: At the nozzle, the mixture meets an atomized spray of water, which hydrates the cement as it exits. Achieving the correct hydration is crucial, as it determines the compressive strength of the final product.

The dry process provides the flexibility to adjust the mix ratio according to project requirements, allowing precise control over the strength and durability of the concrete application.

The Importance of Hydration and Mix Ratios

In both concrete and mortar spraying, the success of the application lies in achieving the right balance of cement, aggregate, and water. Automatic mortar jetting machines help maintain these ratios consistently by regulating the mix and water flow, resulting in durable, high-quality applications. Proper hydration and controlled mix ratios reduce the risk of cracking and ensure a strong bond to the surface.

In sum, automatic mortar jetting machines are essential tools for modern construction, streamlining the process of mortar and cement application, and providing reliability, safety, and efficiency in various demanding environments.