Scope of Application

1. Secondary grouting of equipment foundation and steel structure column base plate.
2. Anchor grouting of foundation bolts.

3. Concrete structure reinforcement grouting.  

CGM-340 grouting material quality assurance Heze peony high-strength non shrinkage grouting material C60

In the early stages of silicosis, there may not be any abnormalities, but after onset, coughing, shortness of breath, chest tightness, chest pain, difficulty breathing, emphysema, and easy complications such as tuberculosis and lung cancer may occur. The dust prevention design of enterprises requires that the production area must be separated from the non production area and must not be arranged in a mixed manner; Except for the duty room, changing room, and washroom, no other non production rooms shall be arranged in the production area. Replace toxicity with non toxicity, low toxicity with high toxicity, and prioritize the use of processes and materials that are non hazardous or less hazardous. The gas collection hood should surround or be close to harmful pollution sources as much as possible, so that pollutants are confined to a smaller space and the suction range is minimized as much as possible, facilitating the capture and control of pollutants.

Construction preparation
1. Quality management at the construction site should have corresponding construction technical standards, a sound quality management system, construction quality control, and quality inspection systems. Before grouting, there should be a construction organization design or construction technical plan, which should be reviewed and approved.
Before grouting construction, mixing equipment, grouting devices, templates, and maintenance items should be prepared.
3. In addition to complying with the relevant provisions of the current national standard "Code for Acceptance of Construction Quality of Concrete Structures" GB 50204, formwork support should also comply with the following regulations:
① During secondary grouting, the horizontal distance between the formwork and the equipment base should be controlled at around 100mm; The top elevation of the template should not be lower than 50mm above the surface of the equipment base.
② When renovating and reinforcing concrete structures, sufficient grouting holes and exhaust holes should be left in the formwork support. The diameter of the grouting holes should not be less than 50mm, and the spacing should not exceed 1000mm. The grouting holes and exhaust holes should be 50mm higher than the high point of the holes.

CGM-340 grouting material quality assurance Heze peony high-strength non shrinkage grouting material C60

As of the end of 1996, there were 297 granite mining areas, widely distributed in various provinces (regions, cities) across the country except for Shanghai, with a total reserve of 1.79 billion cubic meters. Among them, there were 161 granite mining areas for decorative purposes, with a reserve of 950 million cubic meters, including 338 million cubic meters of B+C grade reserves. The reserve of granite mining for decorative purposes is shown in Table 4.24.7. The proven granite reserves in the area include granite, gabbro, diabase, peridotite, diorite, tuff, serpentinite, amphibolite, basalt, pyroxene, etc., among which granite dominates and the proven reserves account for 63.42% of the total reserves.

construction method
▲ Mixing
When mixing cement-based grouting materials, water should be added according to the required amount of water for the product.
2. Cement based grouting materials should be mechanically mixed. When mixing, it is advisable to first add 2/3 of the water and mix for about 3 minutes, then add the remaining amount of water and mix until uniform. If there are specific mixing requirements for AGM-340 products, they should be mixed according to their requirements.
3. The mixing site should be close to the grouting site.
▲ Anchor grouting of foundation bolts
1. The construction process of anchoring anchor bolts should meet the following requirements: ① Cleaning hole 1 ② Cleaning accumulated water in the hole 1 ③ Removing oil stains and rust on the surface of the bolt 1 ④ Inserting bolt adjustment and fixing 1 ⑤ Mixing AGM-340 grouting material 1 ⑥ Building 1 ⑦ Maintenance 1 ⑧ Installing equipment.
When drilling anchor bolts, the horizontal deviation of the bolt holes shall not exceed 5mm, and the vertical deviation shall not exceed 5 °. The wall of the bolt hole should be rough, and the hole should be cleaned thoroughly without any floating dust, oil stains or other impurities. Before grouting, soak it in water for 8-12 hours to remove any accumulated water in the hole. When the ambient temperature is below 5 ° C, measures should be taken to preheat and maintain the temperature above 100 ° C.
Before grouting, the oil stains and rust on the surface of the anchor bolts should be removed.
When pouring the mixed cement-based grouting material into the bolt holes, the position of the bolts can be adjusted as needed. Vibration is strictly prohibited during the grouting process, and bolts cannot be adjusted again after grouting is completed.
5. The upper surface of the grouting layer inside the hole should be about 50mm lower than the surface of the foundation concrete.

The method of finding coordinate lines and points is the same as the second step. Note that the front and side coordinate lines must be staggered. To scale a coordinate point, it is necessary to mark it from the vertical line of the center coordinate to both sides, such as: left 3, right 3. The concave area should also be clearly marked. Find the bottom coordinates on the selected stone and cut out the plane in a timely manner. Using the bottom plane as the standard, find the spatial coordinate lines on the stone. Use proportional magnification to find the main coordinate lines and points on the front and side, and use them as a basis to cut off the Great Wilderness. Then re mark the disconnected coordinates clearly, continue to find other coordinate lines and points, and continuously cut off the excess parts. The more coordinate lines and points you find, the more accurate the shape will be, and the closer the charm will be to the prototype.
▲ Secondary grouting
The appropriate grouting method should be selected for secondary grouting according to the actual situation of the project. The process flow should meet the following requirements: ① Cleaning the equipment foundation ② Soaking in water 24 hours in advance ③ Clearing accumulated water before grouting ④ Preparation of construction equipment ⑤ Mixing AGM-340 grouting material ⑥ Secondary grouting ⑦ Curing.
Before grouting, the equipment base plate and concrete foundation surface in contact with the grouting material should be cleaned thoroughly, and there should be no loose crushed stones, floating slurry, oil stains, wax, etc. 24 hours before grouting, the surface of the foundation concrete should be fully wetted, and the accumulated water should be removed 1 hour before grouting.
During secondary grouting, grouting should be carried out from one side until it overflows from the other side, and grouting should not be carried out simultaneously from opposite sides. After grouting begins, it must be carried out continuously and the grouting time should be shortened as much as possible.
When the track foundation or grouting distance is long, it can be constructed in sections according to the actual engineering situation.
5. Vibration is strictly prohibited during the grouting process. If necessary, a grouting booster should be used (pushing the grouting material along the bottom of the grout flow direction, and it is strictly prohibited to push it from the middle or upper part of the grouting layer).
After the equipment foundation grouting is completed, it is advisable to cut a 45 ° angle outward along the edge of the bottom plate 3-6 hours after grouting.

Most of them are continental sediments, with less marine deposition. Often piled up in front of mountains or in mountain basins. Many feldspar sandstones have been found to form in continental rifts. The Sinian system in Tangshan, Hebei Province produces feldspar sandstone, with feldspar accounting for more than 5%. Rock debris sandstone: The rock debris content accounts for more than 25% of the total amount of sand grade debris. The quartz content is 75% and may contain a small amount of feldspar (1%). The heavy mineral content is high and the types are complex. Cementitious materials are often siliceous and carbonaceous, often containing impurities. When the impurity level is 15%, it belongs to lithic sandstone. The roundness and sorting of debris particles range from moderate to poor. Often appears as light gray, gray green to dark gray. The composition of rock debris is closely related to the properties of the parent rock in the source area, and can be further classified into rock types based on the composition of rock debris.