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.
How many tons per cubic meter of secondary reinforcement and renovation should be used as grouting material for bridge special bearings

What are the advantages of Sichuan sandstone: 1. In terms of decoration, Sichuan sandstone is simple, generous, rough, and natural; The pattern changes uniquely, like tree rings, wood patterns, and landscape paintings in nature; Very elegant, warm, yet luxurious and grand, it can give people a feeling of returning to simplicity and being close to the mountains and wilderness; In addition, it has good compressive and wear-resistant properties, making it an excellent variety for wall, floor decoration, and profiled materials. From an environmental perspective, Sichuan sandstone is a type of matte stone that does not produce light pollution caused by light reflection, and is also a natural anti slip material. Marble and granite are smooth stone materials that only show decorative effects through light, and are prone to light deficiency.

: 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.

 
For example, granite and marble have different formulas for protective agents due to their mineral and chemical compositions. Even within the same category of stone, the concentration may increase or decrease due to differences in density and chemical composition. For example, the concentration of protective agents in sandstone will be higher, while the concentration of protective agents in granite or marble with higher hardness and density will be lower. Therefore, during the maintenance and construction of stone materials, it is necessary to tailor and construct according to the material. Select different chemicals and construction techniques for different stone materials. Not all natural stones require protection. If only waterproofing is needed, some high hardness and high-density stones can be left unprotected during dry hanging construction.

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

Here we introduce the classification and differentiation method of stone protective agents according to their protective effects: classification according to their protective effects: waterproof protective agents: after application, they can prevent water from penetrating into the interior of stone, and they also have the functions of anti fouling (partial), anti aging, anti freezing and thawing, anti biological erosion, etc. Such as type, silicon-based, and organosilicon stone protectants. Anti fouling protective agent: a protective agent specially designed for anti fouling of stone surfaces, with its functionality mainly focused on anti fouling performance, and other properties and effects are average. Such as anti fouling agents on the surface of vitrified tiles. Comprehensive protective agent: In addition to excellent oil proof, anti fouling and anti-aging properties, it also has all the functions of waterproof stone protective agent.

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

Water absorption rate: Soak at room temperature for 24 hours, and the water absorption rate should not exceed 0.5% of the weight of the sample. Black horseshoe fat frost resistance: no cracking or detachment after hanging at -4 ℃ and+6 ℃ for 2 hours each. Drying time: Refers to drying for 5 hours and fully drying for 7 days. Black horsefoot fat volatile matter: 35%. Oxygen index:>3. Black mastic adhesive strength: 2 ℃ 2.5kg/cm2. Elongation rate: 3%. Use temperature of black mastic: -6 ～+95 ℃ Use method of black mastic: apply black mastic on foam glass or non cryogenic parts. On the surface of the insulation material, apply a 3mm coating and space it with a layer of waterproof glass cloth or plastic window screen.

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.

Due to the fact that foaming agent is a highly volatile substance, during the construction process, if the internal temperature of the container is too high due to environmental factors, some of the foaming agent inside the container will begin to vaporize, becoming gas that exists in the hollow space at the top of the container or evaporates into the atmosphere through the holes on the container, resulting in a decrease in the content of foaming agent in the material, or lower than the predetermined ratio. At this time, the foam is not fully foamed, and the density of foam becomes larger, so that the same amount of materials cannot produce the expected volume of foam. During storage, attention should be paid to sealing and direct sunlight is strictly prohibited. The safety measures during the hard foam spraying process should be adequately covered before spraying.

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 GB50204 standard.

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.

I think many people confuse the concepts of several types of artificial stones, such as granite and quartz stone. In fact, what I am going to talk about today is that granite is not quartz stone. So, how should we distinguish between granite and quartz stones, which belong to the same series of artificial stones? A simple method for identifying granite: If sparkling crystals can be seen on both the front and side, it is granite. If a toilet cleaner drops it on the surface and bubbles, it is granite. The cut surface of quartz stone is slightly rough, and if it is too smooth, it has a high resin content and is prone to deformation. The production process of quartz stone can be divided into two types: one is the casting method, which is similar to the production technology of artificial stone. The raw materials are placed in a film, vibrated and solidified, and the main material is quartz powder. This method can be mass-produced, so the price is relatively low, with a market price of less than 1 meter (I have seen 55/meter).

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