CGM High-Strength Non-Shrink Grouting Material, Equipment Foundation Grouting Material, Ultra-High-Strength Non-Shrink Grouting Material

Product Features

1. Early and high strength: 1-day compressive strength ≥ 20 MPa; 3-day compressive strength ≥ 40 MPa; 28-day compressive strength ≥ 120 MPa.

2. Micro-expansion: Ensures tight contact between the equipment and foundation, no shrinkage after secondary grouting.

3. High self-leveling: Fills all voids completely, meets the requirements for secondary grouting of equipment.

4. Anti-segregation: Overcomes the segregation phenomenon caused by excessive water addition during on-site use.

5. Crack Resistance: Crack occurrences during in-situ use due to uncertain water addition, ambient temperature variability, and limitations in maintenance conditions.

6. Durable: After 1 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 work is permitted at temperatures as low as -10℃.

Usage Instructions

Step: Basic Processing

The base surface should be roughened. Clean the base surface, ensuring there is no debris, loose mortar, dust, oil stains, or release agents. Before grouting,24 hours, the base surface should be sufficiently moistened. Remove any 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 integrity of the form system 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 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 Preparation

1. Generally, water is mixed with the universal reinforced type at a standard of 11-13%, and with the pebble reinforced type at a standard of 9-10%.

2. Recommend using mechanical stirring, with a stirring time of usually 1-2 minutes (hand drill stirrers are strictly prohibited). 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. 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

1. For longer equipment or track foundations, segmented construction should be employed.

2. Illustrations of Common Grouting Methods

3. During secondary grouting, the following requirements should be met.

① During secondary grouting, the grout should be applied from multiple points on one side or adjacent sides, continuing until it overflows from the opposite side, to facilitate air release during the grouting process. Grouting from all four sides simultaneously is not allowed.

② After grouting begins, it must be carried out continuously without interruption, and the grouting time should be minimized as much as possible.

③ Absolutely no vibration is allowed during grouting. If necessary, use a grouting booster to push the CGM grouting material along the bottom of the grouting layer. It is strictly prohibited to push from the middle or upper part of the grouting layer to ensure the homogeneity of the grouting layer.

④ After the equipment foundation 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 from forming at the free end. If edge cutting is not possible, smooth the surface of the grout layer with a spatula within 3-6 hours after grouting.

⑤ When the thickness of the grouting layer exceeds 150mm, use a reinforced high-strength, non-shrink grouting material with pebble stones.

⑥ When the amount of grout for equipment foundation is large, mechanical mixing should be used for the aggregate reinforced grout to ensure the grouting construction.

Step 5: Maintenance

1. After grouting is complete, cover it immediately with wet straw or mineral wool blankets within 30 minutes and keep it moist.

2. During winter construction, the maintenance measures should also comply with the current "Specifications for Construction and Acceptance of Reinforced Concrete Engineering."