METHOD OF MAKING EXTRA HEAVY RADIATION-PROTECTIVE HIGH-STRENGTH CONCRETE Russian patent published in 2011 - IPC C04B28/04 G21F1/04 C04B111/20 

FIELD: chemistry.

SUBSTANCE: invention relates to production extra heavy radiation-protective construction materials, and can be used to make reinforced-concrete containers for storing and/or transporting spent nuclear fuel. Method of producing extra heavy radiation-protective high-strength concrete involves preparation of water-retaining iron-containing heavy aggregate which is part of the components of the concrete, said aggregate being in form of ferrous metallurgy wastes and is prepared by premixing with water, preparation of the concrete mix in a mixer by mixing the aggregate with dry components of the concrete mix and hardening water, followed by laying the concrete mix into an article, packing said article, sealing the concrete mix with structural components of the article. When premixing the heavy aggregate with water, the water initially used is hardening water in volume of 1/3 of its calculated amount for mixing, and excess water is then added, the volume of which is calculated using the formula: B_exc=P×V×A, where B_exc is volume of excess water; P is weight taken for 1 m³ of aggregate; V is pore volume of aggregate; A is the saturation limit of pores of the aggregate, and a superplasticiser is also added in amount of 5% of the weight of excess water and hardening water, and premixing is carried out up to the saturation limit of the aggregate with excess water, hardening water with superplasticiser up to 80% of water absorption of the aggregate for 2-3 minutes, after which the saturated aggregate is immediately mixed with other components, where the ferrous metallurgy wastes used are scrap iron-containing briquettes or iron ore pellets. The invention is developed in dependent claims.

EFFECT: improved protective properties of concrete, strength, density, corrosion resistance and longevity.

7 cl, 1 ex, 6 tbl