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Delayed-release concrete lubricant; a professional solution for pouring concrete in hot weather and large projects
If you are looking to increase workability and prevent premature setting of concrete in hot weather or on large projects, a delayed-set concrete admixture is the ideal choice. This specialized admixture delays the hydration process of cement, increasing initial setting time and allowing concrete to be transported and placed over long distances or in hot weather conditions.
Mechanism of action of delayed-release lubricant
By adsorbing onto the surface of cement particles, this product slows down the initial chemical reactions and prevents the rapid formation of hydration gels. As a result, the concrete remains in a paste state for a longer period of time, providing optimal time for transportation, pumping, compaction and surface finishing. Importantly, retarders usually delay setting, but after this period, the hardening process continues at a reasonable rate and the final strength of the concrete is not adversely affected.
Key Benefits
- Increasing the working time and maintaining the fluidity of concrete over long distances
- Preventing the creation of cold joints in large and extensive concreting
- Improve surface finish and reduce separation and water shedding
- Reducing the risk of surface cracks caused by rapid setting in hot weather
- Possibility of pouring concrete at high temperatures and hot and humid weather conditions
- Increased efficiency and pumping capability in projects with dense reinforcement
Main applications:
- Concrete pouring in hot weather and high temperature areas
- Bulky concrete pouring such as dams, foundations and piles
- Production and transportation of concrete over long distances with ready-mixed concrete
- Projects with dense reinforcement and need more time for vibration
- Pouring concrete in hot and dry conditions to prevent cracks caused by plastic shrinkage.
Suggested dosage:
It usually varies between 0.2 and 2% of the weight of the cement used and its effect is highly dependent on temperature, cement type and mixing design. Excessive use can cause very long delay in setting and even a reduction in ultimate strength, so it is essential to conduct field tests to determine the optimal dosage.
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