How to Produce Concrete Mixing Plant in High Temperature Season in Summer

Producing concrete at a mixing station during high-temperature seasons, such as summer, requires specific strategies to prevent issues like rapid evaporation, reduced workability, and premature setting of the concrete. Here’s how to manage concrete production effectively in high temperatures:

  1. Temperature Control of Materials:
    • Cool Aggregates: Store aggregates in shaded areas or spray them with water to lower their temperature before mixing.
    • Use Chilled Water: Replace normal mixing water with chilled water to help control the overall temperature of the concrete mix.
    • Add Ice: In extreme heat, use crushed ice as part of the mixing water. The ice will melt during mixing, absorbing heat and lowering the concrete temperature.
  2. Admixtures:
    • Retarders: Use retarding admixtures to slow down the hydration process and prevent the concrete from setting too quickly.
    • Superplasticizers: Consider using superplasticizers to maintain workability without adding extra water, which could otherwise weaken the concrete.
  3. Timing and Scheduling:
    • Early Morning or Late Evening Work: Schedule concrete mixing and pouring during cooler parts of the day, such as early morning or late evening, to avoid the peak heat.
    • Rapid Placement: Plan for rapid placement and finishing of the concrete to minimize the time the mix is exposed to high temperatures.
  4. Mix Design Adjustments:
    • Reduce Cement Content: Consider reducing the cement content slightly to reduce heat generated from hydration, while ensuring the strength requirements are still met.
    • Increase Water-to-Cement Ratio: Slightly increasing the water-to-cement ratio can improve workability, but be cautious not to compromise the strength and durability of the concrete.
  5. Protective Measures on Site:
    • Shade the Work Area: Use temporary shading or shelters over the mixing and pouring areas to protect the concrete from direct sunlight.
    • Cover the Concrete: Immediately after pouring, cover the concrete with damp burlap, plastic sheeting, or curing blankets to retain moisture and prevent rapid drying.
  6. Curing Techniques:
    • Wet Curing: Implement wet curing methods, such as sprinkling water or using wet coverings, to maintain moisture and reduce the risk of cracking due to rapid evaporation.
    • Curing Compounds: Apply curing compounds that form a protective film on the concrete surface to reduce moisture loss.
  7. Monitoring and Adjustments:
    • Monitor Concrete Temperature: Regularly check the temperature of the concrete mix before, during, and after placement to ensure it stays within the recommended range (generally below 32°C or 90°F).
    • Adjust Mix as Needed: Be ready to adjust the mix proportions or techniques based on real-time temperature and humidity conditions.
  8. Safety Precautions:
    • Worker Hydration and Breaks: Ensure workers stay hydrated and take regular breaks in shaded or cool areas to avoid heat stress.
    • Protect Equipment: Protect equipment from overheating by ensuring they are well-maintained and kept out of direct sunlight when not in use.

By implementing these strategies, you can mitigate the risks associated with high temperatures during summer and ensure the quality and durability of the concrete produced.