What Brand of Brick Is Needed for Walls
What brand do you need brick for walls and what does the brick brand indicate?
If strength is the ability of a material to resist stress and strain without breaking, then a brand is an indicator of strength. It is indicated by the letter “M” with a digital value. The numbers show what load per cm2 a brick can withstand.
For example, brand 100 (M100) means that a brick is guaranteed to withstand a load of 100 kg per 1 cm2. Brick can have a brand of 75 to 300.
Most often, brick M100, 125, 150, 175 are found on sale. For example, for the construction of multi-story buildings, brick no lower than M150 is used. But for a cottage of 2-3 floors, “hundred” is enough (that is, M100).
Which brick should be used for the construction of a cottage?
It is useful for any developer to know that: for construction in the Moscow region, a brick with frost resistance of at least 35 cycles, and even better 50, is needed; a semi-dry pressed brick with frost resistance of 15 cycles is not suitable for wall cladding and foundation laying.
You can distinguish it from a plastic molding brick by its “bed” (the largest side): it has a smooth surface, there are conical hollow voids on it. Such a brick is best used only for internal partitions. If nevertheless, it was used for cladding, then it is necessary to plaster the house immediately.
Stucco, of course, will not create a complete waterproofing but for some time will protect the brick walls; for the construction of a two-, three-story house requires brick M100-125; front brick should be bought of the same brand as the construction one because the entire wall should be of equal strength; double brick is cheaper than a single brick, in addition, mortar and masonry time are additionally saved; porous brick is “warmer” than a simple hollow; it is advisable to buy the entire front brick at once, in one batch, so that the entire lining is uniform in color; the color of clay is not related to the quality of the brick, so buy a brick of the color that you liked; for windows, arches, window sills, fences, etc. there is a special shaped brick; it is not recommended to build a foundation from silicate brick: it is unstable to moisture. You cannot put stoves and pipes out of it – it begins to decompose under the influence of high temperatures.
Is it more profitable to purchase bricks directly from the manufacturer?
Of course, buying at a brick factory will cost less, although a lot will have to pay for transport. In trading companies, brick is on average 15% more expensive than at the factory, but delivery to the place also includes this price. In addition, firms practice discounts. In construction markets, where you can buy a piece by piece, its price can be two times higher than at the factory. Please note that the higher the brand, the more expensive the brick. For example, brick M125 is more expensive than M100, about 10%. The difference in price between the “hundredth” and “two-hundredth” brands maybe 20-30%. It’s more profitable to buy ceramic stones or double bricks. The dependence here is approximately the following: an increase in the size of a brick by 50% increases its price by 20%.
How to identify defective bricks?
According to GOST, marriage is burnout and underburning, and such a brick is not recommended for sale. How to find out if the red brick is burned correctly? If the core of the brick is more saturated in color than the “body”, and rings upon impact, then this is a brick of good quality. The unfinished brick has a characteristic mustard color and makes a dull sound upon impact. An unburnt brick has low frost resistance and is afraid of moisture. Burnt brick blackens, melts, loses clarity of lines and size, it “bursts” from the inside. But experts say that if the brick did not break its shape, and only the core turned out to be black, then it, on the contrary, becomes just iron. It is used for masonry in damp places.
Silicate Brick Exterior Walls and Their Frost Resistance
What is silicate brick and where is it used?
Silicate brick consists of a mixture of sand (about 90%), lime (about 10%) and various additives. It is used for masonry stone and reinforced stone outer and inner walls of buildings and structures, as well as for their cladding. Silicate brick is not used for walls in high humidity conditions, since it absorbs moisture well, as well as for masonry exposed to high temperatures since this causes decomposition of its components.
Silicate brick has high strength and thermal conductivity (higher than that of ceramic brick). By strength, silicate products are made of the following grades: 75, 100, 125, 150, 175, 200, 250, 300. Just like ceramic bricks, silicate is made of face and ordinary.
What does the concept of “frost resistance of a brick” mean?
Frost resistance is the ability of a material to withstand alternate freezing and thawing in the wet state. The frost resistance of brick for external walls (designation – “Mrz”) is measured in cycles. During standard tests, the brick is immersed in water for 8 hours, then placed also for 8 hours in the freezer (this is one cycle). So, until the brick begins to lose weight and strength. Then the tests are stopped and a conclusion is made about the frost resistance of the brick. For Moscow construction projects, it is necessary to use a brick with frost resistance of at least 35 cycles, and preferably 50.