(Construction) - Japanese construction company Takenaka Corporation has developed a high-flow, non-shrink concrete called FINE LEAD F.
This is the first one-component admixture in Japan that combines the three components of water reduction, shrinkage reduction, and segregation reduction. Its high fluidity improves the workability of concrete placement and prevents cracking of the concrete surface after construction, thereby improving the aesthetics and durability of buildings. The product is expected to be used for decorative exposed walls that are difficult to construct. The company have confirmed its effectiveness by applying it to a project developed by themselves. The company plans to actively promote the product as a highly functional concrete.
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Japan’s Takenaka develops high-flow, non-shrink concrete that can improve workability, durability
It was developed jointly with Aichi Prefecture-based Takemoto Oil & Fat Co. The performance, such as strength and hardness, is the same as that of ordinary concrete, but the labor and time required for filling and compacting the concrete with a vibrator, etc., can be greatly reduced. Shrinkage after curing can be reduced to almost zero, and material separation and cracking can be suppressed. As an added benefit, the resistance of the concrete to neutralization is also increased.
As a first step, the company applied the technology to a building in Shibuya-ku, Tokyo, which was designed and constructed in-house. The product was introduced at the entrance and exterior of the building, where the exposed walls were finished with cedar planks and decorative formwork. After more than half a year has passed since the completion of the project, no cracks have appeared on the surface and the aesthetic appearance has been maintained. (2023/10/31)
The Daily Engineering and Construction News of Japan
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