Winter construction

When the daily average temperature is below 5 ° C, winter construction should be carried out and meet the following requirements:
1. Before grouting, measures should be taken to preheat the foundation surface, keep its temperature above 100 ° C, and remove accumulated water.
Before being frozen, the compressive strength of cement-based grouting materials shall not be less than 5MPa.

Quality assurance of grouting material for bridge special bearings Jining Sishui foundation bolt grouting material

However, if this type of coating is applied to the back and sides of the stone, the stone will not be able to be wetted by moisture, which will greatly affect the bond between the stone and cement, and easily cause the stone to immediately loosen and bulge, resulting in a difficult adhesion. Organic silicon fluorine protective agent is a fluorinated silicone and fluorosiloxane protective agent composed of organic silicon fluorine. It has the waterproof advantages of organic silicon and enhances oil and dirt resistance. It is currently the most famous surface protection product. However, the organic silicon fluorine protective agent itself does not have any adhesive properties and cannot be wetted by water. It can only be used for the protection of the front side of the stone. If used for the back side, the test results show that the effect is very good, completely affecting the bonding performance between the stone and cement.
Construction in high temperature climate environment
If the temperature of the grouting site is greater than 35 ° C, construction should be postponed according to the high temperature climate and meet the following requirements:
Measures should be taken 24 hours before grouting to prevent direct or other thermal radiation from the grouting area.
2. Take appropriate cooling measures, and the temperature of the concrete foundation and equipment base plate in contact with the cement-based grouting material should not exceed 35 ° C.
3. The injection temperature of the slurry should not exceed 30 ° C.
4. Moisturizing and curing measures should be taken promptly after grouting.

Quality assurance of grouting material for bridge special bearings Jining Sishui foundation bolt grouting material

Simply put, stone repair is a type of stone service that involves treating defects in the stone to achieve a shiny and beautiful appearance. Traditional and emerging resin materials play an important role in stone restoration and repair technology, with a wide variety of varieties, diverse properties, simple processes, and realistic effects. As materials with refined functions, they have been well applied in the strengthening and repair processes of early processing of stone, and the repair of damage and holes in later stages of stone is also common in these resin materials. Resin is used for strengthening stone, repairing cracks, and bonding boards; Unsaturated resin is used to fill the holes in marble; Resin is also used for surface modification of some stone materials; In addition, some modified tree fingers such as photopolymerization resin have the function of rapid repair.

The maintenance free construction conditions are as follows

When the construction temperature is above 5 ℃ and below 35 ℃, there is no need for maintenance after foundation grouting. If the temperature exceeds the range, the grouting material construction and maintenance methods should be followed for maintenance.

If some stones absorb water and turn yellow or rust yellow. Governance method: Clean up internal pollution, remove color and rust (click to read), and take good protective measures! Preventive measures: Take good measures to protect the stone and prevent moisture from seeping in. Inappropriate coloring can cause color differences in stone, and the main culprits that lead to color differences are color enhancement, color modification, and polishing. Stone coloring can be used to some extent to control color differences, but due to various reasons such as coloring materials and construction techniques, improper coloring not only fails to produce the desired color, but also changes the original color. Even more so, after coloring, due to physical principles, chemical reasons, and physical and chemical reasons, the coloring material changes (the stone itself also changes), resulting in color difference! The way to deal with this situation is to use poison to attack poison, and then re color it, including adding color, polishing, and even consider changing the color (Zhe Tengbei)! Preventive measures include scientific coloring and professional coloring.