Raw mix for making foam concrete

FIELD: construction.

SUBSTANCE: raw mix for making foam concrete includes, wt %: portland cement 35.0-37.0, foaming agent PB-2000 0.25-0.35, TPP ash 10.65-13.25, crushed foam glass of fraction 5-10 mm 20.0-25.0, mineral wool ground and sifted through sieve No. 2.5 1.0-1.5, haydite sand 5.0-7.0, water 21.0-23.0.

EFFECT: higher heat resistance of foam concrete produced from raw mix.

1 tbl

 

The invention relates to the construction materials industry, in particular the production of cellular concrete.

Known mixture for production of foam concrete, comprising, by wt.%: Portland 29-31; foaming agent PB-2000 0,4-0,45; filler (ash TPP) 14,5-23,6; crushed foam glass 10-15; water 37-39 [1].

The objective of the invention is to improve thermal stability of the foam obtained from a raw mixture.

Technical result is achieved by the fact that the raw mix for the production of foam concrete, including Portland cement, foaming agent PB-2000, the ash from power plants, water, crushed foam glass, contains crushed foam glass fraction 5-10 mm and additionally crushed and sifted through a sieve №2,5 mineral wool, expanded clay sand in the following ratio, wt.%: Portland 35,0-37,0; the foaming agent PB-2000 0,25-0,35; the ash from power plants 10,65-13,25; crushed foam glass fraction 5-10 mm 20,0-25,0; crushed and sifted through mesh No.,2,5 mineral wool 1,0-1,5; clay sand 5,0-7,0; water 21,0-23,0.

The composition of the raw mix for the production of foam concrete are given in the table.

In the composition of the raw mix for the production of foam concrete use: Portland cement 400; foaming agent PB-2000, meets the requirements of THE 2481-185-05744685-01, density 1000-1200 kg/m3pH 7-10, foam working solution with a volume fraction of pinao is the Converter 4%, foam stability is not less than 360; any foam glass (trim).

Table
ComponentsComposition, wt.%
123
Portland35,036,037,0
The foaming agent PB-20000,350,30,25
Ash TES10,6512,4513,25
Crushed foam glass fraction 5-10 mm25,022,520,0
Crushed and sifted through a sieve №2,5 mineral wool1,01,251,5
Ceramsite sand7,06,05,0
Water21,0 a 21.523,0
The heat resistance of the foamed concrete according to GOST 20910-90 "heat-resistant Concrete. Technical conditions"555

For the preparation of the raw mixture prepare and dispense commodities. The ash from power plants, crushed foam glass fraction 5-10 mm, crushed and sifted through a sieve №2,5 mineral wool, expanded clay sand and Portland cement mixed in a separate container. In a separate bowl whisk homogeneous foam using water, foaming agent PB-2000. After foam preparation with continuous stirring it injected a mixture of TPP ash, crushed foam glass fraction 5-10 mm, crushed and sifted through a sieve №2,5 mineral wool, expanded clay sand and Portland cement. Cooked, the mixture is evenly spread over the area of pre-oiled metal molds and leave to set. Then the finished product is extracted from forms and transported to the warehouse.

Sources of information

1. EN 2449972 C1, 2012.

Raw mix for the production of foam concrete, including Portland cement, foaming agent PB-2000, the ash from power plants, water, crushed foam glass, characterized in that it contains crushed foam glass fraction 5-10 mm and additionally crushed and prosea the ing through the mesh №2,5 mineral wool, expanded clay sand with the following ratio of components, wt.%:

Portland35,0 is 37.0
the foaming agent PB-20000,25-0,35
ash TES10,65-13,25
crushed foam glass fraction 5-10 mm20,0-25,0
crushed and sifted
through the mesh №2,5 mineral wool1,0-1,5
ceramsite sand5,0-7,0
water21,0-23,0



 

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