Among the many varieties of facing material, the refractory brick has firmly taken its place. The need for it is closely connected with the special operating conditions, which gave impetus to the creation of several types of products of this class with subsequent labeling. It is successfully used for interior finishing of places with a high temperature regime or presence of fire. At home, such places include chimneys, stoves and fireplaces .
Types of refractory bricks.
- Fireclay bricks.
- Quartz brick.
- Other types of refractory bricks.
In the manufacturing process, special types of clay (chamotte) are used, which can withstand high temperatures. The technology of production provides for its burning. To ensure that the finished brick does not crack, the percentage of chamotte should be at least 70%, the remaining 30% is given to mineral additives (quartz, coke, graphite). Some of its species have completely natural components. For domestic use, it is almost impossible to find a replacement for chamotte brick. In contrast to the usual red ceramic brick, the refractory quickly warms up and cools down for a long time.
Manufacturers for the convenience of choosing raw materials, the labeling of products in the form of the letter "SHA" with a number next to it was adopted. Positive characteristics, such as resistance, in acid or alkaline environment make the brick in demand in many areas of industry. The most purchased brands for stoves and fireplaces are PB5 products that withstand temperatures of 1300 ° C, and SHA5, resistant to temperatures of 1600 ° C. PB5 has a coarse appearance, it is much cheaper, so it is used as a rough draft. ShA5, unlike its analog, perfectly smooth, it does not require additional finishing.
Masters for stove laying believe that high-quality products, when struck, should ring like a bell, and have metal stains indicating good firing. A dull sound indicates a violation of manufacturing technology, and, accordingly, about marriage. Chamotte brick has a granular structure with a rough surface. For the convenience of masonry, manufacturers have diversified the number of molds produced.
The percentage of refractory clay in products is very small. Its main constituent is quartz or sandstone. The limited application of this type of bricks is associated with their instability in alkalis and acids. After finishing, they have characteristics that are similar to sandstones.
Increased refractory properties are carbon and a basic brick. They do not lose their shape under huge temperature loads, without which heavy industry, for example, steel production, can not do. Strength of carbon products gives a high percentage of carbon, represented by graphite. The main bricks include magnesite and dolomite products used in metallurgy.
External decor of the home.
The choice of the brand of refractory material is significantly affected by the expected temperature in the working area and the chemical composition of the combustible substances. Time has shown that such an attractive and seemingly reliable material, like clinker brick, can be successfully used for external decoration of fireplaces, barbecues and other appliances, which can be a home. For facing work and masonry chimney recommend to purchase a special fireplace brick, which stands out by the variety of colors and shapes of products. An effective novelty in the market was the appearance of a fireplace glazed brick.
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