POROUS SILICA-BASED MATERIAL AND PORTLANDITE FOR FILLING INSULATING BRICK WITH CONTROLLED STRUCTURE AND CORRESPONDING PRODUCTION METHOD Russian patent published in 2016 - IPC C04B2/10 C04B28/18

Abstract RU 2592909 C2

FIELD: construction.

SUBSTANCE: present invention relates to a method for preparing a porous material containing silica and calcium hydroxide. Method for preparing a porous material containing 25 wt% to 75 wt% of silica and from 75 wt% to 25 wt% of calcium hydroxide comprises the following successive steps: a step synthesising quicklime, a step of mixing the quicklime obtained in the previous step, water and silica according to a molar ratio of CaO/SiO₂ of between 0.8 to 1.2, and a weight ratio of water/(CaO+SiO₂) of between 2 to 60; a step of hydrothermal synthesis at a saturation water-vapour pressure of higher than or equal to 10⁵ Pa (1 bar) and lower or equal to 3×10⁵ Pa (3 bar) and at a temperature higher than or equal to 80 °C and lower than 150 °C, a step of drying the ceramic body obtained at a temperature of 100-450 °C.

EFFECT: production of highly insulating building bricks.

15 cl, 2 tbl, 7 dwg

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RU 2 592 909 C2

Authors

Del-Gallo Paskal

Kantonne Zherom

Dates

2016-07-27—Published

2012-06-25—Filed