During the improvement of houses, cottages, summer residences and individual buildings, the organization of a barbecue area, an original fireplace, stove falls onto the shoulders of private developers. To make up for the goal and rebuild a high-quality design, they use not ordinary, but special cement. Concrete based on refractory cement retains its performance even when interacting with high temperatures, up to 1800 about C.
You can buy material at any hardware store. Cement is also in demand in industrial construction. It is used as a heat-resistant adhesive for facing furnaces operating at high temperatures, above 2000 about C.
What is the feature of cement mortar
The degree of resistance to high temperature and the strength of the material are the main characteristics of the material. In refractory cement, it is much higher than in slag or Portland cement.
The solution acquires operational strength in a short time, due to accelerated hardening. Roasting cement is manufactured in accordance with the technical specifications and requirements put forward for refractory building materials. Able to withstand exposure to open fire throughout the entire period of operation.
The composition of the cement is refractory type adhesive granules that contribute to the reliable adhesion of the brickwork. A design created using such a material eventually acquires the property of stability, reliability and strength. Such a stove or fireplace will not smoke, because the solution does not let air through, reliably blocking voids.
Area of use of refractory materials
Compounds with refractory properties are used when it becomes necessary to perform specialized tasks, the solution of which is impossible without the use of a heat-resistant solution, namely:
- to perform a monolithic lining during the repair of a stove or fireplace;
- for restoration of a thermal device, a melting unit operating at high temperatures (up to 1600 ° C);
- when producing prefabricated reinforced concrete structures with increased resistance to fire, fired in a furnace;
- for the production of refractory bricks and building blocks;
- in the process of preparing a solution for coating the home oven;
- in the manufacture of special mixtures and compositions used in the oil refining industry and the chemical industry;
- for technological needs related to the production of ammonia, phosphorus, alcohol;
- during the construction of stoves, characterized by durability;
- in the glass industry;
- as a binder in the production of lining elements;
- during the construction of fireplaces and modern stoves in new buildings;
- during the construction of chimneys and ventilation for a fireplace or stove.
Features of the choice of refractory material
Why is refractory cement preferable in choosing a mixture for the construction of a furnace? Everything is simple - the material, in comparison with other concrete solutions, is able to maintain the integrity of the formed surface after solidification, even with constant exposure to fire and heat.
This is an ideal binder for carrying out construction work in the cold season. Using the mortar allows you to complete the construction without subsequent shrinkage at negative temperatures up to -10 ° C. When placing bricks on refractory cement, it is enough to let the masonry dry, and after a few days start to heat.
Classification of Refractory Compounds
Materials are distinguished by grades from 100 to 600. The number indicates the strength at a compression ratio of 100-600 bar.
The classes determine the group of mixtures from 30 to 60, depending on the strength characteristics.
Classes from brands differ in the calculation of strength, which is displayed not by averaged indicators, but by security (not less than 95%). This means that out of one hundred percent of the products, 95% must strictly correspond to the scale of assessment of the required class of concrete. The most popular is the class of GTs-40.
Description of the properties of cement GTs-40
The unique composition of refractory cement allows the material not to lose its operational characteristics at ultrahigh temperatures up to 1800 ° C. Compositions supplemented with refractory and heat-resistant fillers are used in the preparation of hydraulically hardened mortars and concrete. Magnesite, chromite ore, chamotte can be used as filler.
Of particular interest to builders is refractory high-alumina cement of class GTS-40, manufactured in accordance with GOST 969-91. It consists of a mixture of limestone, lime or rock containing a large amount of alumina. The material is divided into two groups of classes GTs-40 and GTs-50. Moreover, the second is characterized by an increase in the strength of the formed surface 24 hours after application.
Price categories of cement
A high percentage of sales on the market is available for cement grades VGKTs-075-0.5, VGKTs-75-1 from the company "Ceramics Gzhel", -40, -50, -60 Ukrainian production, FireBarrier 135 (France), Gorkal 40 ( Poland). The reliability of these manufacturers is time-tested.
The table below presents a comparative description of the prices of refractory cement from different manufacturers.
Mark | Packing (kg per pack) | Retail price (rub.) |
alumina gts-40 | fifty | 1 3500 |
Gorkal 40 (Poland) | fifty | 1,400 |
GGCR (Russia) | fifty | 1,500 |
Food prices vary depending on the seasonal factor. In the summer, refractory cement for the furnace will cost more than when buying in the cold season.
Using cement of the “refractory” class, many of the construction processes have been simplified. Now you can build stoves, fireplaces, grills, barbecue terraces and be sure of the quality of the design.