"Pouring Even in Midwinter" DL E&C Receives Certification for 'Cold-Resistant Concrete' Construction Technology

DL E&C announced on the 6th that the 'Cold-Resistant Concrete,' developed domestically for the first time in collaboration with Sampyo Industry, has received the 'Construction New Technology Certification' from the Ministry of Land, Infrastructure and Transport.

A domestic DL E&C construction site is pouring 'cold-weather concrete.' / Photo by DL E&C

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Cold-resistant concrete is the only winter concrete in Korea that can be used even when the temperature drops to minus 10 degrees Celsius. Existing concrete used at construction sites is highly likely to freeze when the temperature falls below zero, making pouring work impossible by conventional methods. Therefore, during winter, 'heat curing' is performed using blowers and heaters until the poured concrete fully hardens.

The problem is that during this process, due to temperature variations, the concrete may fail to achieve the required strength because of curing defects, or cracks may occur due to localized overheating. Additionally, the use of blowers or heaters poses a high risk of suffocation accidents for workers.

To solve these issues, DL E&C directly developed cold-resistant concrete together with Sampyo Industry. They devised a concrete technology that can be used in winter without separate heat curing by using cold-resistant accelerators and stimulants with antifreeze effects. This technology recently received certification as a new construction technology from the Ministry of Land, Infrastructure and Transport. The Construction New Technology Certification is a system that certifies construction technologies that are either newly developed for the first time in Korea or improved existing technologies, judged to have novelty, advancement, and field applicability.

In fact, cold-resistant concrete can achieve the design standard strength 28 days after pouring without heat curing. Construction can proceed even in severe cold, enabling shorter construction periods and consistent quality, and there is no risk of suffocation accidents since blowers or heaters are not used. It also reduces carbon emissions by cutting down fossil fuel usage.

A DL E&C official said, "We received the Ministry of Land, Infrastructure and Transport's new technology certification through differentiated technological capabilities for quality innovation," adding, "We will continue to lead the industry by solving the limitations and challenges of existing construction technologies."

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