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, Support Mortar, CGM High-Strength Emergency Repair Material; High-Strength Polymer Mortar, Epoxy Support Grouting, Polymer Crack-Resistant Mortar, Polymer Waterproof Mortar, Cement Road Fast Repair Material, Track Mortar, Concrete Carbonation Resistance Coating, Surface Treatment Agent, Prestressed Pipe Grouting Agent, Abrasion-Resistant Floor Hardener, and Product Master Batch...
CGM High-Strength Non-Shrink Grouting Material
Product Features: 1. Early and high strength: Compressive strength of ≥27 MPa after 1 day; ≥40 MPa after 3 days; and ≥60 MPa after 28 days.
2. Microexpansivity
Ensure tight contact between the equipment and foundation, with no shrinkage after secondary grouting.
3. High self-leveling properties
Fills all voids, meets the requirements for secondary grouting of equipment.
4. Anti-segregation
Overcame the phenomenon of segregation caused by excessive water addition during on-site use.
5. Crack Resistance
Cracking phenomena during on-site use due to uncertain water addition, ambient temperature variability, and limitations on maintenance conditions.
6. Durable
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 significantly improves.
7. Suitable for winter construction
Outdoor construction is permitted at temperatures as low as -10℃.
Product Application:
1. Used for secondary grouting of equipment foundations.
2. For anchoring ground bolts and reinforcing bar embedding.
3. For reinforcing and repairing concrete structures.
Technical Specifications:
Pre-construction preparation
1. Mechanical Mixing: Concrete or mortar mixer;
2. Manual Stirring: Several mixing tanks and shovels.
3. Several buckets;
4. Several weigh scales;
5. Chute
6. High-position funnels, grouting pipes, and pipe fittings
7. Grouting booster
8. Templates (steel molds, wood molds)
9. Burlap 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, free from debris such as gravel, slurry, dust, oil stains, and release agents. Prior to grouting, the base surface should be thoroughly moistened 24 hours in advance, and standing water should be cleared 1 hour before grouting.
Step Two: Touch and Feel
1. Set up forms according to the grouting construction drawing. Seal the joints between the forms and the foundation, as well as between forms, using cement grout and tape to ensure the entire form set is watertight.
2. The horizontal distance around the template and base should be maintained at approximately 100mm to facilitate grouting work.
3. The template top elevation should be 50mm higher than the surface of the equipment base.
4. In case of leakage during grouting, it should be addressed promptly.
Step 3: Grout Material Mixing
Generally, add water and mix according to a standard of 13-14% for general reinforced type, and 9-10% for stone aggregate reinforced type.
2. Mechanically stirred, the mixing time is typically 1-2 minutes (electric drill mixers are strictly prohibited). When mixing manually, first mix for 2 minutes with 2/3 of the water, then add the remaining water and continue stirring 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. During on-site use, it is strictly prohibited to add any admixtures or external additives to the CGM grouting material.
Step 4: Grouting Construction Method
For longer equipment or track foundations, segmental construction should be employed.
2. Illustrations of Common Grouting Methods
3. During the secondary grouting, the following requirements should be met.
1.1 During secondary grouting, it should be performed from multiple points on one side or both adjacent sides, until it overflows from the other side, to facilitate air release during the grouting process. Grouting from all four sides simultaneously is not allowed.
1.2 Once grouting begins, it must be conducted continuously without interruption and the grouting time should be minimized as much as possible.
1.3 Vibration is strictly prohibited during the grouting process. If necessary, the grouting material can be propelled using a grouting booster along the bottom of the grouting layer, but it is strictly forbidden to push from the middle or upper part of the grouting layer to ensure the homogeneity of the grouting layer.
1.4 After the equipment base grouting is completed, a 45-degree bevel should be cut outward along the equipment edge within 3-6 hours post-grouting (refer to the illustration below) to prevent cracks from forming at the ends. If edge cutting is not possible, the surface of the grouting layer should be smoothed with a trowel within 3-6 hours after grouting.
1.5 When the thickness of the grouting layer exceeds 150mm, it is recommended to use high-strength shrinkage-free grouting material reinforced with pebbles.
1.6 When the amount of grout for equipment foundation is large, the mixing of aggregate reinforcement grout should be done mechanically to ensure the grouting construction.
Step 5: Maintenance
Within 30 minutes after grouting is complete, immediately cover with a wet straw cover or rock wool blanket and maintain moisture.
2. During winter construction, maintenance measures should also comply with the relevant provisions of the current >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 and Environmental Temperature Relationship Chart" for the specific time.
4. After the equipment foundation grouting is completed, if any portions need to be removed, gently scrape them off with a trowel or shovel tool 3-6 hours after grouting, before the grouting layer hardens.
5. Do not transmit vibrations from operating machinery to the equipment foundation. After secondary grouting, the machine should be shut down for 24-36 hours to prevent damage to the unhardened grouting layer.
Packaging and Storage
Packaging specification: 50kg/bag, store in a well-ventilated and dry place, and prevent direct sunlight.
