Under what circumstances will winter construction measures be adopted for masonry projects?

Winter construction measures When the outdoor daily average temperature is stable below 5℃ for 5 consecutive days, winter construction measures should be adopted. 1. Before masonry, dirt, frost, etc. on the surface of the blocks should be removed. Blocks or bricks that have been frozen by water should not be used. 2. Lime plaster should be protected from freezing. If frozen, it should be thawed before use. 3. The sand used for mixing mortar must not contain ice cubes and frozen blocks larger than 10mm. 4. The two-time feeding method should be used for mixing mortar. The water temperature should not be higher than 80℃. 5. When adding antifreeze to masonry mortar, it should be inspected and tested to meet the requirements before use. 6. Blocks and bricks must not be watered, but the mortar consistency must be increased. 7. After daily laying of new masonry, it should be covered with insulation materials, and no mortar should be left on the surface of the masonry. Before continuing to build masonry, the surface of the masonry should be swept clean before construction.