Shijia Gujian Company's Main Products: CGM High-Strength Non-Shrink Grouting Series, CGM-340, CGM-380, Epoxy Grouting, Epoxy Patching 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-Resistant Paint, Surface Treatment Agent, Prestressed Pipe Grouting Agent, Abrasion-Resistant Floor Hardener, and Product Masterbatch...
CGM High-Strength Non-Shrink Grouting Material
Product Features: 1. Early strength, high strength—1-day compressive strength ≥ 27 MPa; 3-day compressive strength ≥ 40 MPa; 28-day compressive strength ≥ 60 MPa.
2. Microexpansivity
Ensure tight contact between the equipment and foundation, with no shrinkage after secondary grouting.
3. High fluidity
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, fluctuating environmental temperatures, and limitations on maintenance conditions.
6. Durable
After over one million fatigue tests and 50 freeze-thaw cycles, there is no significant change in strength. The strength is notably improved after soaking in engine oil for 30 days.
7. Suitable for winter construction
Outdoor construction is permitted at temperatures as low as -10°C.
Product Application:
1. Used for secondary grouting of equipment foundations.
2. Used for anchoring foot bolts and reinforcing bar embedding.
3. For reinforcing and repairing concrete structures.
Technical Specifications:
Preparation Before Construction
1. Mechanical Mixing: Concrete mixer or mortar mixer.
2. Manual Stirring: Several mixing basins and shovels.
3. Several buckets.
4. Several scales
5. Chute
6. High-position funnel, grouting pipe, and pipe connectors
7. Grouting booster
8. Templates (steel molds, wooden 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 is 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
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 integrity of the form assembly is watertight.
2. The horizontal distance from the template to the base of the equipment should be maintained around 100mm to facilitate grouting work.
3. The template's top elevation should be 50mm above 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. Mix mechanically for 1-2 minutes (hand drills are strictly prohibited). For manual mixing, first mix with 2/3 of the water for 2 minutes, then add the remaining water and mix until uniform.
3. The mixing quantity should be adjusted according to the usage, ensuring the materials are used up within 40 minutes.
4. During on-site use, it is strictly prohibited to add any admixtures or external additives to 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 the secondary grouting, it should be carried out 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.
After the grouting begins, it must be conducted continuously without interruption and the grouting time should be minimized as much as possible.
1.3 It is strictly prohibited to vibrate during the grouting process. If necessary, use a grouting booster to push the CGM grouting material along the bottom of the grouting layer, but严禁 pushing 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, cut a 45-degree angle outward along the equipment edge within 3-6 hours after grouting (as shown in the figure below) to prevent cracks at the ends. If edge cutting is not possible, smooth the grouting layer surface 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 foundation grouting is large, the mixing of the pebble-reinforced grouting material should be done mechanically to ensure the grouting construction.
Step 5: Maintenance
1. Immediately cover with wet straw or mineral wool blankets within 30 minutes after grouting, 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. 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 parts need to be removed, they can be gently scraped off with a trowel or shovel tool 3-6 hours after grouting, before the grout 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.
