SU405845A1 - METHOD OF MAKING CONSTRUCTION PRODUCTS - Google Patents

Description

one

This invention relates to the industry of construction materials and iron and steel. Changing, nanr, and measuring, in precast concrete plants.

From 1 stdnb method for the manufacture of construction products from hardening mixtures by preparing the mixture, molding products, nap, size, p, during vibration and heat treatment of them.

The presence of thermal surfaces, but the differential pressure in the molding mixture during its preparation and in the molding products during the heat treatment process causes internal stresses and destructive changes, which worsen the finished products.

The purpose of the article is to improve the physical and mechanical properties of products and increase productivity.

This is achieved by the fact that the operations of preparing s mixture, molding products and thermal processing are carried out in the dynamic equilibrium mode of the processes of co-condensation and evaporation of vapors near the surface of the mixture and products while regulating the temperature of the medium synchronously with the change in volume and products.

Before preparing the mixture, pre-heating of solid and liquid particles can be carried out, and during the heat treatment of the products, the latter can be subjected to repeated vibrating.

The essence of the method is as follows.

The dry mixture into the visitor's vein and the fillers and separating | H | 0 water or water with additives is heated by any method known in the known way to set the optimum temperature, depending mainly on the species of the viscous substance. A broomstick is used to make a concrete mix, to form articles IB of preheated forms, pribi and vibrating and subsequent heat treatment, reapply them, place them at 0.5-1.5 minutes. Ave and isometric PeXiOia .x in the temperature range of 38-98 ° C. These operations are carried out in closed volumes with relative humidity of the medium, providing an equilibrium of the processes of condensation and evaporation of water vapor at the surface of the mixture and products. Equilibrium is achieved by creating conditions that are characterized by the paiBeHCTBOiM environment temperature and concrete temperature at a relative humidity of the environment close to 100%. In such conditions, x elasticity

water vapor in the medium is equal to the elasticity of the water level on the surface of the concrete mix. or on the surface of the molded product.

The creation of these conditions is hampered by exothermic hydration reactions, which form

temperature drops, which reduce to the maximum of the automat: automatic regulation, and the temperature of the medium is inversely variable with the temperature of the central layers of the concrete mix and products.

/ Subject invention

1. A method for the manufacture of building products: from hardening mixtures by preparing omesis, molding products, for example, dyeing, molding, and heating them, characterized in that, in order to improve the physical-mechanical problems of the products and improve productivity, oleration of mixture preparation, molding, products and telus processing, they are carried out in the dynamic equilibrium mode of the condensation processes and evaporation of water vapor at the surface of the mixture and products while controlling the temperature of the medium in-line with the change in Temperature mixtures and products.

2. The method according to l. 1, characterized in that the preparation, in order to prepare the mixture, pre-heats the solid and liquid components, and during the heat treatment of the products, the latter are subjected to repeated vibration.