METHOD OF PREPARING CEMENT CONCRETE WITH DRY VEGETABLE ADDITIVE Russian patent published in 2025 - IPC C04B28/02 

FIELD: construction.

SUBSTANCE: invention relates to construction and can be used in making building envelopes from cement concrete. Method of preparing cement concrete with a dry vegetable additive includes preparing a concrete mixture of Portland cement, a superplasticiser, fine and coarse aggregate, water and a vegetable additive in the form of crushed hogweed, mixing for at least 5 minutes in a concrete mixer and pouring into the formwork, followed by hardening in normal conditions for 28 days. Before preparing the concrete mixture, Portland cement together with Sosnowsky's hogweed chips with size of 0-10 mm and activated for 2-5 minutes with superplasticizer C-3 in amount of 1-1.5% of weight of cement in apparatus of vortex layer with power saturation of working zone of apparatus of not less than 100 kW/m³, at the same time content of hogweed in concrete mixture is 3-5% of weight of portland cement, consumption of which per 1 m³ of concrete is 490 kg, and ratio of cement, fine and coarse aggregate in concrete mixture is 1:1.3:2.68.

EFFECT: reduction of heat conductivity and density of the obtained articles without reduction of their strength.

1 cl, 1 tbl