Concrete repairIf construction is required during the winter season, in addition to considering relevant laws and regulations, the following provisions should also be taken into account:
The concrete anti-freezing agent added during the repair of the shotcrete should be determined by experiment to ensure it does not cause significant harm to the surface color of the concrete. During the construction of engineering projects across seasons, it is necessary to consider the potential harm to the surface color of the concrete caused by the intake amount of the concrete anti-freezing agent; improve the heat insulation of concrete mixers and mixing pumps to ensure the temperature of the concrete entering the mold is not less than10°C。
When repairing exposed aggregate concrete, we choose to use heated aggregates and other methods. The temperature is determined based on construction conditions and local climate through thermal insulation calculations, ensuring that the mixing temperature of the exposed aggregate concrete mixture is not less than15°C; Inside the steel tube scaffolding, two layers of woven fabric are hung to create a platform steel grating, producing a relatively enclosed natural environment for Site II. Additionally, enhance monitoring of the concrete strength improvement, ensure proper setting of standard test blocks, and conduct concrete temperature measurements.
