SU713848A1 - Composition for producing porous concrete filler - Google Patents

Description

one

The invention relates to the field of building materials, namely, compositions for the manufacture of porous lightweight aggregates used in construction.

A known composition for the manufacture of a porous aggregate, including loam (40-60%) and refractory carbonaceous clay (4060%), coal preparation waste 1.

However, the aggregate of this composition has low mechanical strength (15-18 kg / cm), high water absorption (26-28%), low frost resistance (10-15 cycles).

The aim of the invention is to increase the strength, frost resistance and reduce the water absorption of the aggregate.

This is achieved by the fact that the composition for making a porous aggregate of concrete, including loam and refractory carbonaceous clay, contains these components in the following amounts, wt%:

Loam 80-85

Hardtop

carbon clay 15-20

Example. High-melting kaolite carbonized clay (up to 30% coal) was crushed and sieved through a 0.5 mm sieve.

Loess loam (80%) and refractory, carbonized clay (20%) are sent to fine grinding rollers, and then to a mixer-humidifier. The wetted mass is fed to any type of granulator (plate, drum, perforated rollers, etc.), the granules are fired, dried, in a rotary kiln at 1050 HOO C, cooled (in a chain or other type of refrigerator) and sent to the original bunker. Roasting time from the moment of loading into the kiln before unloading is no more than 35-40 minutes. The mechanical strength of the granules when squeezed in the cylinder is 50-70 kg / cm with a bulk density of 750 kg / m, frost resistance, more than 100 cycles. Water absorption up to 15%.

With the introduction of less than 15% of carbonized clay, the bulk weight of the aggregate increases, as the amount of COAL injected with the clay decreases. With the introduction of more than 20% of carbonized clay, the bulk density is reduced to 650 kg / m.

In addition, the introduction of more than 20% of eaugled clay is not economically feasible, although all the physicomechanical properties of the aggregate are improved.

With the introduction of 20% carbonized refractory clay, 6% of uniformly distributed (naturally distributed) coal, which is in natural clay, is simultaneously introduced. This amount of coal is quite enough to get a fine porous filler from loess loam: ka with a bulk weight of 727-760 kg / m and high mechanical strength (up to 70 kg / cm).

When using an object, mechanical strength and frost resistance are increased 10 times. The total economic effect per year will be about 500 thousand rubles. with the performance of the plant for the production of jelly, concrete structures with a volume of 200 m of concrete.

Claims (1)

1. Agloporite and agloporitic concrete. Minsk, Science and Technology, 1964, p. 107-108.