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.

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That is, the inside can be filled with foam strips and the outside with silicone glue. The main quality requirement for construction quality inspection using adhesive is not to allow hollowing or unevenness that does not meet the requirements. Within 2 hours after construction, tracking and quality inspection must be carried out. If the area of hollowing is found to be within 5cm2, it should be removed and re constructed for more than 3 consecutive places. Flatness inspection is carried out using a 2m long aluminum tube to check if the middle seam is greater than 5mm. If it is greater than 5mm, it should be readjusted. Conclusion: After the completion of the project, several data points were compared with dry hanging stone, including a 2% reduction in cost; Energy saving rate increased by 15%.
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.

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Focus on clearing debts through investment projects and drive the progress of debt clearance work. Highlight the solution to the problem of overdue project payments for housing, municipal, education, transportation and other projects with a high proportion of arrears. Relevant departments should be responsible for the debt clearance work of local investment projects according to their functional division and project funding channels, supervise and guide the debt clearance work of local investment projects, and actively supervise the implementation of local promised funds. The provincial level is responsible for the overall responsibility of local debt collection work, and organizes the debt collection work of local investment projects at all levels. It is necessary to strengthen the supervision and inspection of the repayment plan of first level investment projects at the municipal level, take necessary encouragement and restriction measures, and promote the debt collection work.

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.

For the exterior wall insulation system with a coating finish layer, a self weight of 1kg/m2 does not require consideration of the shear force between the material layers of the system. As long as the base surface has sufficient bonding strength, the safety of the system can be satisfied by pasting. For the external insulation system of ceramic tile facing exterior walls, it is necessary to use the method of bonding with adhesive nails. Meanwhile, due to the influence of heavy ceramic tiles on the bonding state between the protective surface layer and the polystyrene board, the anchor bolts must be anchored behind the reinforced mesh layer. Set expansion joints. According to testing, for a 5m long insulation wall, when the temperature difference of the tiles is 4 ℃, the displacement value at the edge (corner) of the wall can reach. 5mm, while the displacement caused by humidity is also. 1mm.