How to Realize the Construction of Concrete Mixing Station in Winter

When constructing a concrete mixing station in winter, it’s crucial to address the challenges posed by low temperatures to ensure the quality of the concrete and the progress of the construction. Here are key steps and considerations:

  1. Site Selection and Design:
    • Choose a site with good drainage to prevent water accumulation and freezing.
    • Incorporate insulation materials into the design of the building's exterior walls.
  2. Heating the Mixing Water:
    • Use heating equipment to keep the mixing water at an appropriate temperature, typically between 30-60°C, to prevent freezing and ensure proper hydration of the cement.
    • Boilers or electric heaters can be used to heat the water.
  3. Preheating Aggregates:
    • Preheat the aggregates before they enter the mixer to prevent the concrete temperature from dropping too low.
    • Methods include using hot air blowers, heated shelters, or hot water soaking.
  4. Use of Admixtures:
    • Add antifreeze or early-strength admixtures to improve the concrete’s frost resistance and early strength.
    • Select appropriate admixtures based on the conditions and strictly follow the recommended dosage.
  5. Concrete Mixing and Transportation:
    • Ensure that the concrete’s temperature during mixing remains above 5°C.
    • Minimize the transportation time from the mixing station to the construction site, and use insulated truck mixers to prevent the concrete temperature from dropping too quickly.
  6. On-Site Pouring and Curing:
    • Immediately cover the poured concrete with insulation materials such as straw mats, plastic sheets, or thermal blankets to prevent the surface from freezing.
    • Use steam heating or electric heating methods to maintain the concrete temperature during curing.
  7. Emergency Measures:
    • Develop contingency plans for sudden weather changes, such as rapid temperature drops.
    • Equip the site with necessary snow removal tools and materials to ensure access to the site and roads.

These measures help ensure the quality and progress of concrete mixing station construction during winter, avoiding issues related to low temperatures.