silicate brick

Brick - a common name for several different in composition and properties, methods for the production of small sized materials, united to each other form and manner of application in construction.As one of the oldest building materials, bricks are used throughout the history of mankind.Silicate brick - a relatively new type of building material.

Its production was made possible only because of the emergence of new technologies.In comparison with ceramic, it requires less energy to manufacture, less demanding quality raw materials in its manufacture easier to achieve the desired characteristics, with its application to organize mass production easier.

What is sand-lime bricks?

The term "silicate brick building" means the following: it is chemically bonded small sized products having the shape of a cuboid, used for masonry wall structures.Standard sand-lime brick is obtained by pressing, autoclave curing of the wet mixture of sand and lime or lime-kremnezёmistogo binder.

in the mixture for the production of sand-lime bricks are present:

• lime construction;
• sand;
• belite sludge;
• ash;
• fine grain ash and slag mixture;
• slag;
• schelocheustoychivye pigments;
• water.

presence of ash and slag can be fully or partially substitute for the presence in the composition of the silicate brick quartz sand, which leads to a decrease in the density of bricks, as well as to improve its thermal insulation and strength characteristics.Furthermore, it reduces the amount of required binder about 35-40%, reduce the time of autoclave exposure bricks 15-20%, reduce the cost of the finished product.

Varieties material

components that make up, cause the properties and characteristics of varieties of bricks.This leads to the existence of the following types:

• sand-lime brick - the most commonly used form of silicate brick, which is composed of lime 7-10%, 90-93% quartz sand;
• lime-ash bricks is composed of 75-80% ash, lime 20-25%;
• lime-slag bricks made by mixing lightweight porous slag 88-97% to 3-12% lime.

According to constructive performance characteristics, silicate bricks manufacturers produce:

• full-bodied;
• hollow.

Existing regulations allow the release of silicate bricks of different sizes, emptiness and location directly voids form, according to the customer's wishes.In this case, a prerequisite is compliance with GOST, concerning strength properties, thermal conductivity and frost products.According

purpose (use in masonry), sand-lime brick is divided into:

• ordinary - is then hidden under a layer of finishing material;
• front (facing) - used for walls of buildings.

Silicate brick can be produced:

• uncolored (white lime bricks, light gray);
• colored (with the addition of coloring pigment of the corresponding color on the stage of preparation or mixture covered in paint curing period).

Dimensions and weight of silica brick

has the following dimensions and weight:

• 250 × 120 × 65 mm;3.2-3.7 kg (single);
• 250 × 120 × 88 mm;3,7-5 kg ​​(thickened called one and a half or more modular);
• 250 × 120 × 138 mm;5.4 kg (double).

Specifications silicate brick

1. Durability: M75 - M300 dependent on:

• prochnostnogo limit in compression: 75 - 300 kg / cm²;
• of the strength limit at a bend: 16 - 40 (brick), as well as 8 - 24 kgf / cm² (hollow one and a half).

Density: 1300 - 1900 kg / m³.

heat conduction Indicators:

• hollow - 0.66 W / (m · ° C);
• corpulent - 0.7 W / (m · ° C).

indicators hardiness: 15-100 cycles determines the labeling: F15, F25, F35, F50, F75, F100 (face brick not less than F25).

Water absorption: 6-16%.

Index vapor permeability: 0.11 mg / (m * h * Pa).

Fire: Group NG (non-combustible).

Soundproofing: at least 64 dB.

Advantages The advantages of silica include:

• excellent sound absorbing qualities provide the possibility of building walls all in a half-brick.This is enough to provide the required sound insulation;
• good performance by frost;
• great strength, allowing high-rise buildings to erect;
• sufficient number of colors and sizes, making it possible to implement different architectural solutions.

Disadvantages

Compared to ceramic, to the shortcomings of silicate bricks include: heavier weight, reduced specifications for water resistance and fire resistance.

Scope

silicate brick has been used successfully: for the construction of low-rise, high-rise buildings, with the exception of underground parts of buildings and various structures exposed to an increased influence of high temperatures and constant humidity.Photo and video reviews disclose all possible uses of silica brick, laying his ways.Positive feedback on the use of silica brick in the construction make it possible to assert that it is - one of the major modern construction materials.

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