Affiliation:
1. Kagawa University Takamatsu Japan
2. Mitsubishi UBE Cement Corporation Ube Japan
Abstract
AbstractThe use of cementitious materials in deep sea environments, focusing on the durability challenges of low‐temperature seawater and hydraulic pressure, are presented in this paper. The authors conducted laboratory and deep‐sea field experiments, thermodynamic calculation, and evaluated the performance of different types of binders in deep sea conditions. Durability of rebar in cementitious materials was investigated. In situ construction methods using cementitious materials was demonstrated on the deep‐sea field. Testing results revealed that deep sea conditions, especially low‐temperature seawater, can accelerate the disintegration of cement hydrates, and the use of pozzolanic admixture and calcium aluminate cement can improve its resistance. Our study provides valuable insights and applicability of cementitious materials to deep sea infrastructure construction.
Subject
General Earth and Planetary Sciences,General Environmental Science
Reference15 articles.
1. Physicochemical properties of the Portland cement-based mortar exposed to deep seafloor conditions at a depth of 1680 m
2. Action of Hydraulic Pressure on Portland Cement Mortars - Current Understanding and Related Progress of the First-Ever In-Situ Deep Sea Tests at a 3515 m Depth
3. In situ observation for the influence of hydraulic pressure on internal damage of cement-based materials
4. Kobayashi M. Takahashi K. Yamanaka T. Makita H.(2019)Physicochemical properties and durability of cement-based materials on the deep sea floor. The proceedings of 15th International Congress on the Chemistry of Cement 75.
5. Takahashi K. Kawabata Y. Iwanami M. Kobayashi M.(2023)Cement use under extreme marine environment–deep sea. The proceedings of 16th International Congress on the Chemistry of Cement submitted.