METHOD FOR PREPARING LIMESTONE LOW-STRENGTH CRUSHED STONE Russian patent published in 2023 - IPC C04B20/10 

FIELD: building materials.

SUBSTANCE: invention relates to the production of building materials, in particular building rubble, for further use in civil and road construction. The method for preparing low-strength limestone crushed stone includes impregnation of a layer of crushed stone at the place of laying with a heated water-alcohol solution containing mineralized water, isopropyl alcohol and hydrolysis production waste, by spraying it over the laid layer of crushed stone at an impregnating solution consumption of 20 l/m2, followed by compaction of crushed stone during the passages on one track and drying in natural climatic conditions. The water-alcohol solution contains these components in the following ratio, wt.%: mineralized water 50.73-79.55, isopropyl alcohol 12.50-23.91, hydrolysis production waste 7.96-25.36. Crushed stone is laid in a layer 30 cm thick, and compaction of crushed stone is carried out at a distributed load of 40-50 kN/m, with 4-6 passes along one track.

EFFECT: increasing the strength characteristics of limestone low-strength crushed stone.

1 cl, 2 tbl