FIELD: manufacture of building materials.
SUBSTANCE: complex modification, which can find use in manufacture of a variety of fast-hardening concrete and reinforced concrete ware and units from heavy and light concrete required no heat treatment as well as when accomplishing cast-in-place construction, comprises, wt %: alkali hardener 7.65-19.90, super-plasticizer 7.65-15.30, polyhydroxydicarboxylic acid 0.042-0.093, soda ash 0.22-0.50, and microsilica - the rest.
EFFECT: improved concrete mortar workability control, increased strength rise stability and strength of final concretes.
2 tbl
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