FIELD: setting liquid cementing compositions remaining liquid within period of time required for use in flexible container for forming shaft lining.
SUBSTANCE: proposed composition contains (i) Portland cement in the amount of at least 8%, preferably 10%; (ii) water soluble silicate in the amount of about 2%; (iii) water in the amount adequate for obtaining mass ratio of water to solids about 1.2:1; per cents are given for combined mass (i), (ii) and (iii). After mixing the components, viscosity is rather low for introduction of make-up water. Composition may contain (iv) pozzoulana in the amount of from 2 to 35 mass-% considered for combined mass (i), (ii), (iii) and (iv). Proposed composition is self-aligning cementing composition at accelerated picking-up of strength which may be transferred for at least 24 h after storage under static conditions.
EFFECT: low cost of composition; enhanced stability to sedimentation.
11 cl, 5 tbl, 5 ex
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