FIELD: construction.
SUBSTANCE: invention relates to a composition and production of nanocement (NC) based on portland cement (PC) clinker and modifier (M) - naphthalenesulphonates (NS). PC includes mineral phases - alite and belite (block microcrystals), aluminates and calcium alumoferrites, and particles are enclosed in nanoshells (capsules) of NS with thickness of 30-100 nm with specific surface area of 400-600 m2/kg. In disclosed NC molecular mass (MM) of NS in capsules is 600-800 Da. On top of capsules is diffused a layer (d-layer) from throttled at grinding NS with MM 300-600 Da, and under capsules - etched layer of mineral phases (TMF-layer) is result of contact interaction with gluing capsules of acid on alkaline alite substrate. Thickness of TMF-layer is 2-50 nm. It includes nanoblocks of alite with size of 1-20 nm. Technical result is increased persistence NC not less than 1 year without loss of strength, reducing factor and protection of cement stone from carbonisation; faster growth strength NC and concrete based thereon and improving its level to 3-4 class against portland cement. NC includes calcium sulphate component and mineral supplements, both active and fillers. Method of producing NC - combined grinding of said components to achieve: a) complete coating capsules d-layer by a criterion of minimum degree of aggregation of particles, which is determined by air permeability; b) complete coating PC-component with TMF-layer based on criterion of double maximum heat release on graph prepared from grinding product cement dough during setting in calorimeter. Both parameters are integral and characterise finished product.
EFFECT: composition and method can be used in cement industry and construction industry.
5 cl, 5 dwg, 4 tbl, 5 ex
