Guangdong Shijia Guojian Building Materials Technology Co., Ltd. specializes in the following main products: CGM High-Strength Non-Shrink Grouting Series (including CGM-340, CGM-380), Epoxy Grouting, Epoxy Patching Mortar, CGM-320 Support Grouting, Fast-Filling Gravity Mortar, Seat Mortar, CGM High-Strength Emergency Repair Material; High-Strength Polymer Mortar, Epoxy Support Grouting, Polymer Anti-Crack Mortar, Polymer Waterproof Mortar, Rapid Repair Material for Cement Roadways, Track Mortar, Concrete Carbonation-Resistant Coating, Bonding Agent, Prestressed Pipe Grouting Agent, Abrasion-Resistant Floor Hardener, and raw materials for products...
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; ≥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
Fills all voids, meeting the requirements for secondary grouting of equipment.
4. Anti-settling
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 limited curing conditions.
6. Durable
After one million fatigue tests and 50 freeze-thaw cycles, there is no significant change in strength. After being soaked in engine oil for 30 days, the strength improves notably.
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. Used for anchoring foundation bolts and embedding steel bars.
3. For reinforcement and repair of 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 scales
5. Chute
6. High-position funnel, grouting pipe, and pipe connectors;
7. Grouting Propulsion Unit
8. Templates (steel molds, wood molds)
9. Sacking bags, rock wool blankets, etc.
10. Cotton yarn, tape
Grouting construction
Step 1: Basic Processing
The base surface should be scarified. Clean the base surface and ensure there are no debris, float, dust, oil stains, and release agents, etc. The base surface should be adequately moistened 24 hours before grouting, and standing water should be removed 1 hour before grouting.
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 equipment base should be maintained at about 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, water is mixed with the universal reinforced type at a standard rate of 13-14%, and with the pebble reinforced type at a standard rate of 9-10%.
2. Mechanical stirring is used, with a typical mixing time of 1-2 minutes (hand drills are strictly prohibited for stirring). 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. It is strictly prohibited to mix any admixtures or external additives into 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. When performing 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 permitted.
1.2 Once grouting begins, it must be conducted continuously without interruption, and efforts should be made to minimize the grouting time.
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.
After the equipment base grouting is completed, cut a 45-degree angle outward along the equipment edge within 3-6 hours after grouting (refer to the illustration below) to prevent cracks from forming 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 gravel high-strength shrinkage-free grouting material.
1.6 When the amount of base grouting for the equipment is large, mechanical mixing should be used for the aggregate reinforcement grouting material to ensure the grouting construction.
Step 5: Maintenance
1. Within 30 minutes after grouting is completed, immediately cover with wet straw or mineral wool blankets and keep moist.
2. During winter construction, maintenance measures should also comply with the relevant provisions of the current >GB50204.
3. Once the grouting material reaches the demolding time, the equipment installation can be performed. Refer to the "Demolding, Curing Time and Environmental Temperature Relationship Table" for the specific time.
4. After the equipment foundation grouting is completed, if there is a need to remove any part, it 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 specification: 50kg per bag, store in a well-ventilated and dry place, and protect from direct sunlight.
