submerged concrete
n
бетон, уложенный под водой
https://eng_rus_building.academic.ru/21885/submerged_concret...

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Pouring Foundations Under Water
https://indianapublicmedia.org/amomentofscience/pouring-foun...

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UNDERWATER CONCRETE SANTHINI K.P S8, CE 28 GUIDED BY MANASWI C.M
2.  Concrete is the premier construction material across the world and the most widely used in all types of civil engineering works.  During the construction of bridges , dams or any other structure where the foundation part of the structure is lie underwater, we have to opt for underwater construction  When concrete is placed under water, it induces concrete to deteriorate uniformity  Therefore should be follow proper mix design, concrete production and placement and quality control.
https://www.slideshare.net/santhinishanthu/underwater-concre...

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Myth number three
Gypsum concrete is not a hydraulic cement.
Standard Terminology Relating to Hydraulic Cement defines hydraulic cement as:

a cement that sets in water and is capable of doing so underwater.

Gypsum completely fulfills this definition, and it is proper to call gypsum-based self-levelers a ‘gypsum cement’ (as it comes from the bag) and a ‘gypsum concrete’ (after it is sets up as a floor underlayment).
https://www.constructionspecifier.com/dispelling-common-myth...