Hanil Cement and Hanil Industry said on the 14th that their jointly developed "ultra-retention concrete" technology received a technology performance certification in the architecture and construction materials field from the Korea Institute of Building Construction.
The certified technology is titled "ultra-retention concrete technology that enables long-term flowability by improving the fines sensitivity of aggregates through low-molecular CMA and a flowability modifier."
Conventional ready-mixed concrete can see quality changes when aggregates such as sand and gravel contain a large amount of fine powder. The new technology reduces the effects of fine powder in aggregates to prevent material segregation in the ready-mixed concrete mix and help secure the initial strength of structures.
The ultra-retention concrete was developed by combining Hanil Industry's admixture formulation technology with Hanil Cement's cement material technology. It can maintain flowability for up to 3 hours after production even during heat waves with an average temperature of 35°C.
Compared with ordinary concrete, which begins to set if not placed within 90 minutes after production, it secures more than twice the working time. It can be applied to urban job sites where transport times may be extended due to traffic congestion.
By adjusting the production mix for each season, it was designed to reduce quality variation due to climate conditions and maintain consistent quality year-round.
A Hanil Cement Technology Research Institute official said, "With this certification, the excellence of the technology that can solve quality challenges at construction sites has been objectively recognized," adding, "We plan to actively respond to demand at construction sites through various solutions going forward."