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.

CGM-340 grouting material quotation: Wuwei high-strength non shrinkage grouting material C60

Diamond abrasive belongs to the category of superhard abrasive. Although its processing history is relatively long, it has been widely used in industrial production over the past thirty years, with a microhardness of 8-1 kgf/mm2; Hardness is the mechanism of micro cutting when processing materials, so it is a cutting tool. In recent years, its production has increased significantly and industrial costs have decreased. It has high processing efficiency (more than 5 times that of ordinary) and good processing effect (can polish materials with high requirements). Therefore, its application is becoming increasingly widespread. Diamond grinding tools mainly include metal, resin, ceramic, etc., which are classified according to the type of binder. Metal grinding tools mainly include iron-based, copper based, cobalt based, which determines the processing cost of different types of materials. As a grinding tool, its particle size ranges from the coarsest (2 #) to often as fine as 4 #; Its characteristic is a long service life, but the cost will be higher.
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.

CGM-340 grouting material quotation: Wuwei high-strength non shrinkage grouting material C60

Marble is mainly composed of minerals such as calcite and dolomite, with the former being the most common. The molecular formula of calcite is CaCO3, and dolomite is CaMg [CO3] 2, both of which have carbon ions [CO3]. They are relatively active and easily interact with air to form gypsum (Ca [SO4]. 2H2O), which is in the form of turbid particles. Fangjie stone is prone to react with water, forming carbon hydrogen calcium (Ca [HCO3] 2) that dissolves in water and then turns back into carbon calcium after losing water. After these changes, the original crystal polished surface of the marble polishing board no longer exists, so marble is not suitable for exterior wall decoration, especially for outdoor decorative materials.

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.

At the beginning, the temperature of the structure was 23 ℃. Then, keeping the wall temperature of the second material side constant, a constant heat flux (5w/m2) is added to the other wall of the structure. This allows for the calculation of the hourly heat transfer through the structure It was found that within the first 15 minutes, the heat flow through the 1: component was almost zero And the heat flow through the two types of structures is not equal until 8 hours later; so Due to the presence of phase change materials, the heat transfer through building structures can be greatly reduced This greatly reduces the cooling load of the building This is of particular significance for buildings where roof load plays an important role The emergence of phase change walls has a positive driving effect on the future development of air conditioning technology.