Grouting construction

Basic processing

1. Clean the surface of the foundation without any debris such as crushed stones, floating slurry, floating ash, oil stains, and release agents.

2. 24 hours before grouting, the foundation surface should be fully wetted, and 1 hour before grouting, any accumulated water should be removed.
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: Support mold

1. Set up templates according to the grouting construction drawing. The joints between templates and foundations, as well as between templates, shall be sealed with cement slurry, tape, etc. to achieve the degree of overall template waterproofing.

2. The horizontal distance between the template and the equipment base should be controlled at around 100mm to facilitate grouting construction.

3. The top elevation of the template should be 50mm higher than the surface of the equipment base.

4. If there is grout leakage during grouting, it should be dealt with in a timely manner.

 
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Step 3: Preparation of grouting material

1. The general reinforced type is mixed with water at a standard of 12-13%, while the pea gravel reinforced type is mixed with water at a standard of 9-10%.

2. It is recommended to use mechanical stirring method, and the stirring time is generally 1-2 minutes. When using manual mixing, 2/3 of the water should be added first and mixed for 2 minutes, then the remaining water should be added and mixed evenly

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3. The amount of mixing each time should be determined based on the amount used to ensure that the material is used up within 30 minutes.

4. During on-site use, it is strictly prohibited to add any admixtures or external additives to the grouting material.

Step 4: Grouting Construction Method

1. Long equipment or track foundations should be constructed in sections.

2. During secondary grouting, grouting should be carried out from multiple points on one side or adjacent sides until it overflows from the other side, in order to facilitate exhaust during the grouting process. Grouting shall not be carried out simultaneously from all four sides

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3. After grouting begins, it must be carried out continuously without interruption. And shorten the grouting time as much as possible.

4. Vibration is strictly prohibited during the grouting process. If necessary, a grouting booster can be used to push the grouting material along the bottom of the grouting layer. It is strictly prohibited to push it from the middle or upper part of the grouting layer to ensure its uniformity.

5. After the equipment foundation grouting is completed, a 45 degree oblique angle should be cut outward along the edge of the equipment 3-6 hours after grouting to prevent cracks from forming at the free end. If edge cutting is not possible, the surface of the grouting layer should be smoothed with a trowel 3-6 hours after grouting.

6. The thickness of each grouting material should not exceed 100mm.

Before laying artificial stone on the ground, the quality of the base layer should be checked first. If there are problems such as hollowing or cracking in the base layer, it should be repaired and cured for at least 48 hours before proceeding to the next construction. Before laying the stone, the base layer should be cleaned of floating slurry, dust and other pollutants, and the flatness of the base layer should be checked. A 2m ruler should be used for inspection, and the flatness deviation should be less than 3mm. Otherwise, fine leveling should be carried out. Stone laying can only be carried out after meeting the flatness requirements. If the flatness or elevation cannot meet the construction requirements, wet leveling should be carried out before proceeding to the next construction step. Wet leveling construction method: Use a level to measure the level, mark the elevation every 2 meters, and then use a 1:3 mortar to press and level.

7. When the grouting volume of the equipment foundation is large, the mixing of pea gravel reinforced grouting material should be done by mechanical mixing to ensure grouting construction.

Step 5: Maintenance

1. Within 30 minutes after grouting is completed, a wet grass curtain or rock wool blanket should be immediately covered and kept moist.

2. During winter construction, maintenance measures should also comply with the relevant provisions of the current Code for Construction and Acceptance of Reinforced Concrete Engineering (GB50204).

3. After the grouting material reaches the demoulding time, equipment installation can be carried out. For specific time, please refer to the "Relationship Table between Demoulding and Curing Time and Environmental Temperature".

4. After the grouting of the equipment foundation is completed, if any parts need to be removed, they can be gently removed with a spatula or shovel tool 3-6 hours after the grouting is completed, before the grouting layer hardens.

5. The vibration of the running machine should not be transmitted to the equipment foundation. After the secondary grouting, the machine should be stopped for 24-36 hours to avoid damaging the uncured grouting layer.

Starting from the corner of the wall, connect the fixed panels vertically in a staggered manner to ensure that the corner is straight and vertical. The glass wool boards are interlocked and interlocked at the corners of the yin and yang. Glass wool at the four corners of door and window openings shall not be spliced, and a whole piece of glass wool board shall be cut and formed with a cut perpendicular to the board surface. The same insulation board shall be pasted and fixed at the corners of the wall surface. When encountering window or door openings, the length and width of the glass wool board should be determined on site according to the wall area for waterproofing and special parts treatment. Waterproof and moisture-proof: Each piece of glass cotton board is packaged in a small plastic bag. Before installation, check whether the plastic bag is damaged. If there is any damage, attach a small plastic bag; Cover the top of the glass cotton board with plastic cloth before applying adhesive to prevent rainwater from leaking onto the inside of the glass cotton board; At the corner of the glass cotton board where the glass cotton board is exposed, use aluminum foil strips of the same material as the surface layer to firmly adhere it; Silicone sealant must be applied tightly at the joints of the stone.

Recommended dosage

Calculate the actual usage based on a reference dosage of 2.28-2.4 tons/cubic meter.

Packaging, storage and transportation

1. Packaging specifications: 50kg ± 1kg per bag, stored in a ventilated and dry place and protected from direct sunlight.

2. The shelf life is 3 months. If it exceeds the shelf life, it should be retested and qualified before use.

3. Does not contain components such as benzene derivatives, halogenated hydrocarbons, heavy metals, etc., non-toxic, odorless, pollution-free, non flammable and non explosive, and can be transported as general cargo