Guangdong Shijia Guojian Building Materials Technology Co., Ltd. Main Products:CGM High-Strength Non-Shrink Grouting Series, CGM-340, CGM-380, Epoxy Grouting, Epoxy Repair Mortar, CGM-320 Support Grouting, Quick-Fill Gravity Mortar, Setting Mortar, CGM High-Strength Emergency Repair Material; High-Strength Polymer Mortar, Epoxy Support Grouting, Polymer Crack-Resistant Mortar, Polymer Waterproof Mortar, Concrete Road Fast Repair Material, Rail Mastic, Concrete Carbonation Resistance Coating, Surface Treatment Agent, Prestressed Pipe Grouting Agent, Wear-Resistant Floor Hardener, and Product Master Batch...
CGM High-Strength Non-Shrink Grouting Material
Product Features1. Early strength, high strength: Compressive strength ≥27 MPa in 1 day; ≥40 MPa in 3 days; ≥60 MPa in 28 days.
2. Low expansion coefficient
Ensure tight contact between the equipment and foundation, with no shrinkage after secondary grouting.
3. High self-leveling property
Fills all voids, meets 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 factors such as uncertain water addition, unpredictable environmental temperatures, and limited curing conditions.
6. Durable
After millions of fatigue testsNo significant change in strength after 50 freeze-thaw cycles. Strength increased notably after soaking in engine oil for 30 days.
7. Suitable for winter construction
Permitted toOutdoor construction at -10°C temperatures.
Product Application:
1. Used 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:
Preparation before construction
1. Machine Mixing: Concrete mixer or mortar mixer;
2. Manual Stirring: Several mixing basins and shovels.
3. Several buckets;
4. Several weigh scales;
5. Chute
6. High-position funnel, grouting pipes, and pipe joints.
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 and ensure there are no debris, slurry, loose dust, oil stains, and release agents, etc. Prior to grouting.24 hours, the base surface should be sufficiently moistened. One hour before grouting, remove any standing water.
Step 2: Feel and Touch
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 about 100mm for ease of grouting work.
3. The template top elevation should be 50mm higher than the surface of the equipment base.
4. If leakage occurs during grouting, it should be addressed promptly.
Step 3: Grout Mixture Preparation
Generally, water is mixed according to a standard of 13-14% for general reinforced type, and 9-10% for pebble reinforced type.
2. Use mechanical stirring method; stirring time is usually 1-2 minutes (electric drills are strictly prohibited for stirring). When using manual stirring, 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. When in use on-site, it is strictly prohibited to mix any admixture or additional material into the CGM grouting material.
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.
1.1 During secondary grouting, the grout should be applied 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.
1.2 Once grouting begins, it must be conducted continuously without interruption, and efforts should be made to minimize the grouting time.
1.3 Vibration is strictly prohibited during grouting. If necessary, the grouting material can be propelled along the bottom of the grouting layer using a grouting booster, 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.
After the equipment foundation 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 cracking at the ends. If edge cutting is not possible, the grouting layer surface should be smoothed with a trowel within 3-6 hours after grouting.
When the thickness of the grouting layer exceeds 150mm, use reinforced high-strength, non-shrinkage grouting material with gravel aggregates.
1.6 When the amount of equipment base grouting is large, the mixing of aggregate-reinforced grouting material should be done mechanically to ensure the grouting construction.
