CGM High-Strength Non-Shrink Grouting Material
Product Features1. Early strength, 1-day compressive strength ≥ 27 MPa; 3-day compressive strength ≥ 40 MPa; 28-day compressive strength ≥ 60 MPa.
2. Microexpansive
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, ambient temperature, and limitations of maintenance conditions.
6. Durable
After millions of fatigue testsNo significant change in strength after 50 freeze-thaw cycles. Strength significantly increased after soaking in engine oil for 30 days.
7. Suitable for winter construction
Permitted toOutdoor construction at -10℃ temperatures.
Product Application:
1. Used for secondary grouting of equipment foundations.
2. For anchoring foot bolts and reinforcing bar embedding.
3. Used for reinforcement and repair of concrete structures.
Technical Specifications:
Preparation before construction
1. Machine Mixing: Concrete mixer or mortar mixer;
2. Manual Stirring: Several mixing tanks and shovels
3. Several buckets;
4. Several scales
5. Chute
6. High-position funnels, grouting pipes, and pipe fittings;
7. Grouting Propeller
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, ensuring there is no debris such as gravel, slurry, loose dust, oil stains, and release agents. Prior to grouting24 hours, the base surface should be fully moistened. Remove standing water 1 hour before grouting.
Step 2: Feel and Touch
1. Set up forms according to the grouting construction drawing. Seal the joints between forms and the foundation, as well as between forms, using cement grout and tape to ensure the overall form is waterproof.
2. The horizontal distance around the template and base should be maintained at approximately 100mm to facilitate grouting work.
3. The template's 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 Mixture Preparation
Generally, mix with water according to a standard of 13-14% for general reinforced type, and 9-10% for pebble reinforced type.
2. Stir using a mechanical mixer for 1-2 minutes (do not use a drill mixer). When stirring manually, first mix for 2 minutes with 2/3 of the water, 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. It is strictly prohibited to add any admixture or external additive to the 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 Several 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 the grouting time should be minimized as much as possible.
1.3 It is strictly prohibited to vibrate during the grouting process. If necessary, the grouting booster may be used to push the CGM grouting material 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.
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 cannot be performed, the grouting layer's 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 base grouting volume of the equipment is large, mechanical mixing should be used for the aggregate reinforced grouting material to ensure the grouting construction.
Step 5: Maintenance
1. Within 30 minutes after grouting is complete, immediately cover with a wet straw lid or mineral 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 Table" 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 grouting layer hardens.
5. Do not transmit vibration 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 specifications: 50kg/bag, store in a well-ventilated and dry place, and protect from direct sunlight.
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