CAST-IN-SITU CONCRETING METHOD OF SEA PLATFORM Russian patent published in 2014 - IPC C04B28/04 C04B28/08 E02B17/00 C04B111/20 

FIELD: construction.

SUBSTANCE: invention relates to erection of cast-in-situ structures in difficult-to-access areas, and namely to cast concrete mixtures for cast-in-situ concreting of building structures. A cast-in-situ concreting method of a stationary sea ice-resistant platform involves preparation of concrete mix by mixing of dry components: a binding agent - Portland-slag cement, quartz sand, granite crushed stone with fraction of 5-20 mm, fine crushed mineral filler - MP-1 powder, with water and additives - a plasticising agent based on polycarboxylates - Muraplast FK-63 and hardening retarder - Centrament Retard 390, till concrete mix of cast consistency with cone spread of 50-70 cm is obtained, and with delamination of not more than 0.4% and with preservation capacity of at least 3 hours, supply of concrete mix to a framework with a concrete pump at flow rate of 2500-3000 l/h, and hardening is performed under normal conditions during 28-60 days, at the following component ratio, wt %: Portland-slag cement 13.3-16.9, quartz sand 42.4-42.6, the above said crushed stone 25.3-27.9, mineral powder MP-1 6.6-6.8, the above said plasticising agent 0.1-0.2, the above hardening retarder 0.07-0.08, and water is the rest.

EFFECT: providing viscosity and preservation capacity of concrete mix at its supply, and improving concrete crack resistance.

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