Guangdong Shijia Gaojian Building Materials Technology Co., Ltd.
Main Products: CGM High-Strength Non-Shrink Grouting Series, CGM-340, CGM-380, Epoxy Grouting, Epoxy Patching Mortar, CGM-320 Support Grouting, Fast-Fill Gravity Mortar, Seat Mortar, New Bridge Specification Prestressed Pipe Grouting Agent, CGM High-Strength Emergency Repair Material; High-Strength Polymer Mortar, High-Performance Self-Leveling Mortar (Colorful), High-Strength Abrasive Material, Steel Adhesive, Reinforcement Adhesive, Steel Encasement Grouting Adhesive, Joint Sealant, Carbon Adhesive, Dry-Hanging Adhesive; Interface Treatment Agent, Prestressed Pipe Grouting Agent, Wear-Resistant Floor Hardener, and Product Masterbatch...
CGM High-Strength Non-Shrink Grouting Material
Product Features: 1. Early and high strength – compressive strength of ≥27 Mpa in 1 day; ≥40 Mpa in 3 days; and ≥60 Mpa in 28 days.
2. Tensile expansion
Ensure tight contact between the equipment and foundation; no shrinkage after secondary grouting.
3. High fluidity
Fills all voids, meeting the requirements for secondary grouting of equipment.
4. Anti-segregation
Overcame the segregation phenomenon caused by excessive water addition during on-site use.
5. Crack Resistance
Cracking phenomena during on-site use due to uncertain water addition, unknown environmental temperatures, and limited curing conditions.
6. High durability
After 500,000 fatigue tests and 50 freeze-thaw cycles, there is no significant change in strength. After soaking in engine oil for 30 days, the strength is notably improved.
7. Suitable for winter construction
Outdoor construction is permitted at temperatures as low as -10°C.
Product Application:
For secondary grouting of equipment foundations.
2. For anchoring foot bolts and reinforcing bar embedding.
3. Used for reinforcing and repairing concrete structures.
Technical Specifications:
Pre-construction preparations
1. Machine Mixing: Concrete mixer or mortar mixer;
2. Manual Stirring: Several mixing tanks and shovels;
3. Several buckets;
4. Several weighing scales;
5. Chute
6. High-position funnels, grouting pipes, and pipe fittings;
7. Grouting Propeller
8. Templates (steel molds, wood molds)
9. Straw bags, rock wool blankets, etc.
10. Cotton yarn, tape;
Grouting construction
Step 1: Basic Processing
The base surface should be roughened. Clean the base surface, ensuring there are no debris such as gravel, slurry, loose dust, oil stains, and release agents. The base surface should be thoroughly moistened 24 hours before grouting, and any standing water should be cleared 1 hour before grouting.
Step 2: Feel & Touch
Set up molds according to the grouting construction drawings. Seal the joints between the molds and the foundation, and between the molds themselves, with cement grout and tape to ensure that the entire mold system is leak-proof.
2. The horizontal distance around the template and base should be maintained at about 100mm for ease of grouting work.
3. The template's top elevation should be 50mm higher than the surface of the equipment's base.
4. In the grouting process, if leakage occurs, it should be addressed promptly.
Step 3: Grouting Material Preparation
Generally, water is mixed according to a standard of 13-14% for general reinforced type and 9-10% for pebble reinforced type.
2. Recommend using mechanical stirring, which typically takes 1-2 minutes (electric drill stirrers are strictly prohibited). When stirring manually, first mix with 2/3 of the water for 2 minutes, then add the remaining water and stir until uniform.
3. The mixing quantity should be determined based on the usage amount to ensure the material is used up within 40 minutes.
4. No admixtures or external additives are permitted to be mixed with CGM grouting material during on-site use.
Step 4: Grouting Construction Method
1. For longer equipment or track foundations, segmented construction should be employed.
2. Illustrations of Common Grouting Methods
3. During the secondary grouting, the following requirements should be met.
During the secondary grouting, the grouting should be performed from multiple points on one side or adjacent sides until it overflows from the opposite side, to facilitate air release during the grouting process. Grouting from all four sides simultaneously is not allowed.
② After grouting begins, it must be carried out continuously without interruption, and the grouting time should be minimized as much as possible.
③ Absolutely no vibration is allowed during grouting. If necessary, use a grouting booster to push CGM grouting material along the bottom of the grouting layer. It is strictly prohibited to push from the middle or upper part of the grouting layer to ensure the homogeneity of the grouting layer.
④ After the equipment foundation grouting is completed, a 45-degree bevel should be cut along the equipment edge within 3-6 hours post-grouting (refer to the illustration below) to prevent cracks from forming at the free end. If edge cutting is not possible, the grouting layer surface should be smoothed with a trowel within 3-6 hours after grouting.
⑤ When the thickness of the grouting layer exceeds 150mm, use reinforced high-strength, non-shrinkage grouting material with pebble aggregates.
⑥ When the amount of grouting for the equipment foundation is large, the mixing of the aggregate-reinforced grouting material should be done mechanically to ensure the grouting construction.
Step 5: Maintenance
1. After grouting, immediately cover with wet straw or rock wool blankets within 30 minutes, and maintain moisture.
2. During winter construction, maintenance measures should also comply with the relevant provisions of the current "Code for Construction and Acceptance of Reinforced Concrete Engineering" (GB50204).
3. After the grouting material reaches the demolding time, the equipment installation can be carried out. Please refer to the "Demolding and Curing Time vs. Environmental Temperature Table" for the specific time.
4. After the equipment foundation grouting is completed, if any part needs to be removed, it can be gently scraped off with a spatula or shovel tool 3-6 hours after grouting, before the grout hardens.
