Prefabricated House Grouting Bucket

The equipment related to prefabricated house grouting buckets mainly involves the preparation and construction of grout in sleeve grouting technology. Its core function is to provide high-strength, micro-expanding grout for steel bar connections, ensuring structural safety and construction efficiency.

1. Core Equipment Types of Grouting Buckets

Grouting construction requires professional mixing equipment to prepare the grout. Common types include:

1. Vertical Single-Layer Mixing Bucket: For example, a 900L mortar mixing bucket, suitable for large-scale grout preparation. It has a large capacity and is easy to operate, meeting the matching needs of grouting machines in construction projects.
2. Double-Layer Mortar Mixing Bucket: It achieves better insulation or heating effects through a double-layer structure, suitable for scenarios with special requirements for grout temperature, ensuring stable grout properties.
   These equipment need to have a uniform mixing function to avoid grout stratification or bubble generation. At the same time, they need to be used in conjunction with grouting machines to achieve a continuous supply of grout.

2. Key Characteristics and Construction Requirements of Grouting Material

1. Grout Characteristics:
   • High Flowability: It needs to have self-leveling ability to ensure that the grout can fully fill the inside of the sleeve and expel air.
   • Micro-Expandability: By compensating for shrinkage, it reduces volume changes after hardening, avoiding gaps between the steel bar and the sleeve.
   • Early-Strength and High-Strength: The compressive strength needs to be ≥60MPa to quickly transfer the axial force of the steel bar and ensure structural stability.
2. Construction Parameter Control:
   • Water-Cement Ratio: Strictly controlled at around 12.5%. Too high or too low will affect the strength and flowability of the grout.
   • Mixing Time: It needs to last for 3-5 minutes to ensure that the grout is uniform and free of lumps.
   • Static Degasification: After mixing, let it stand for 1-2 minutes to expel bubbles and avoid the formation of pores after hardening.

3. Structure and Material of Grouting Sleeve

The grouting sleeve is the core component for connecting steel bars. It is usually made of ductile iron or high-quality carbon steel. Its inner wall is designed with annular grooves or spiral protrusions to enhance the bonding force with the grout through mechanical interlocking. The sleeve has grouting holes and vent holes at both ends, which are used for injecting grout and expelling excess gas respectively, ensuring filling density.

4. Application Scenarios and Advantages

Sleeve grouting technology is widely used in the connection of prefabricated concrete shear walls, frame columns, and frame beams, with the following advantages:

• Simple Construction: No on-site welding or bolt connection is required, reducing manual operation errors.
• Reliable Connection: High-strength grout forms an integral whole with steel bars and sleeves, and its mechanical properties are superior to traditional connection methods.
• Good Tolerance for Dimensional Deviations: It can adapt to small deviations in component dimensions and reduce installation accuracy requirements.

5. Environmental and Curing Requirements

Grouting construction should be carried out at an ambient temperature of 5℃-35℃ to avoid grout freezing at low temperatures or accelerated water evaporation at high temperatures. After hardening, it needs to be moisturized and cured for the first 72 hours to prevent cracking and ensure strength development.