Nippon Steel’s Reformed Tsunami Deposit Soil Adopted to Port Subgrade

Nippon Steel and Nippon Steel Engineering announced on Thursday trial use of their modified soil was decided as subgrade material in restoration work of Sendai port, Miyagi, Japan. The companies modified Tsunami deposit soil of the Great East Japan Earthquake, which is applicable for subgrade material of sea embankments or roads. The modified soil will be used at 140 tonnes (80 cubic meters) for restoration of Sendai port. Nippon Steel Group appeals utilization of the material for reconstruction works in the disaster areas.

Tsunami deposit soil is a kind of soft mad containing rubbles. Nippon Steel and Nippon Steel Engineering implemented a test to reform the deposit soil to the suitable soil for building materials in September. They added calcia reforming material, which is slag generated in steel making process, to the deposit soil. Mixed material is mixed by twister process and rubbles are rejected.

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