Procedure for preparing ballast material for underwater pipeline. RU patent 2412393.

FIELD: machine building.

SUBSTANCE: procedure for preparing ballast material for underwater pipeline consists in mixing cement, filler, water and plasticiser to make mixture of specified density and flowability. As plasticiser there is used filler of big dimension from the group: barite or iron containing ore or their mixture. Also, mixing is carried out in two stages. At the first stage 10-20 wt % of said big dimension filler of its total amount is supplied into the mixer together with cement, water and plasticiser and mixed for 10-15 sec. At the second stage the rest filler of big dimension is supplied in equal batches with intervals of 10-15 sec, and it is mixed; the components are mixed till there is obtained a homogenous mixture.

EFFECT: raised mechanical strength and density of ballast material.

6 cl, 1 tbl

IPC classes for russian patent Procedure for preparing ballast material for underwater pipeline. RU patent 2412393. (RU 2412393):

F16L58/06 - by cement, concrete, or the like

C04B28 - Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements

C04B111/20 - LIME; MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS (devitrified glass-ceramics C03C0010000000); REFRACTORIES (alloys based on refractory metals C22C); TREATMENT OF NATURAL STONE

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