SU1728165A1 - Raw material mixture for obtaining benzoroasted wall stone - Google Patents

Abstract

The invention relates to the production of unburned boulders and can be used for the construction of walls and buildings. The purpose of the invention is to increase the mechanical strength. Raw mixture contains, wt%: cement 5-10, keratophyres 70-80, water - the rest. The strength of wall stone under compression is 135 kg / cm2. 1 tab.

Description

The invention relates to the production of unbaked wall stone, And can be used for the construction of walls of buildings.

The purpose of the invention is to increase the mechanical strength.

Keratophyres are acidic volcanic rocks of white-gray color with a SiO2 content of at least 30%, with particle sizes of 0.14–5 mm. The keratophyre microstructure consists of more than 50% of feldsparic alkali and alumina grains.

When the proposed dry mixture is mixed with water, the aggregate grain (keratophyre) is spliced with cement. This is due to the migration of calcium oxide hydrate, produced by hydrating three-calcium silicate, to the surface of keratophyre grain. As a result, Ca (OH) 2 and CaCO3 crystals are formed on the surface of the aggregate. Water wetting keratophyre grains is involved in the formation of the contact layer. On the surface of keratophyre grains, compounds of the type of carboaluminate are formed, which strengthen the adhesion.

Hardening of wall stone from the proposed mixture was carried out in a steam chamber. Strength increases as a result of the physicochemical processes of interaction of cement with water, which take place under heat and humidity conditions.

For comparative analysis, a mixture with vitrofir and keratophyre is prepared with the same ratio of components. Samples of 4x4x16 cm are prepared from each mixture in standard forms for testing strength characteristics. The mixture is compacted in forms on a standard vibrating table with an oscillation amplitude A of 0.4 mm and a frequency of 2800 rpm. Compaction time 3 min. Then the form with sample beams is placed in a steam chamber equipped with an automatic steaming mode of 3 + 15 + 3 hours at 60-65 ° C. After steaming, samples are tested.

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for strength, first for bending with the MII-100 device, and then for compressing with a 2GP-50 press.

The test results are presented in the table.

Comparison of the test results showed that the proposed mixture in terms of physical and mechanical properties has an advantage over the known one.

Claims (1)

Invention Formula The raw material mixture to produce a non-burning wall stone, including cement, acid volcanic rock aggregate and water, characterized in that, in order to increase mechanical strength, it contains keratophyres as an acid volcanic rock aggregate in the following ratio, wt.%: Cement Keratophyres Water 5-10 70-80 Rest