Crack in Concrete
Overweight or bad weather can cause cracks in the concrete.
Concrete is widely used as a building material because it is easy to use and very durable but it may be damaged by cracking.
What to do when cracks occur?
The first step is to make a very fundamental decision: Should cracks in concrete be removed or repaired? Or is it possible to accept the concrete with cracks? What if the cracks are ignored?
Does cracking in concrete affect the building or the surrounding concrete?
How are concrete cracks created?
First of all, it can be said that concrete is a durable building material, but the very important point about is the way that we use it.
The main reasons for degradation of concrete and its cracking can be the concrete placing period, temperature, type of concrete construction material, time of transport and consumption of concrete in place, amount of additives, vibration rate, atmospheric factors and some other factors affecting concrete cracks.
But what causes concrete to break and crack?
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There are several answers to this question:
In the process of concrete preparation, inaccuracy in the use of suitable sands, non-observance of precise granulation of sand and gravel, non-observance of uniformity in the dose of cement consumption, lack of proper quality of used cement, inaccuracy in consumption of additives, inaccuracy in mixing water are some the causes of cracks in concrete.
In the process of preparing or baking concrete, if it takes a long time, it starts to hydrate and harden the cement, which leads to cracking by shrinkage.
Another possibility is excessive tensile or compressive loads on the concrete. Cracks may also appear in concrete by climate change. Therefore, frequent temperature fluctuation cause cracks. For example, the infiltration of water into the concrete creates ice crystals in the cold season and the production of steam and gas in the summer (temperature difference between 20 degrees Celsius day and night), which causes deep and mostly surface cracking of the concrete.
Concrete maintenance is also a frequent reason for concrete cracks. This means that if the concrete has a proper production and placement process, it should be noted that after the placement of concrete, maintenance in the early stages is very important. Tips such as protecting concrete from cold and heat, proper curing, non-spraying of soil and building materials before initial and intermediate curing on fresh concrete surface and…
Observing the above points can prevent cracking and decay of concrete. However, all of the above may sometimes be out of control, so it is recommended to use products such as NSG-N50 and all kinds of P.P fibers for increasing the coefficient of resistance and sealing of concrete structures and reducing cracks, and to use the SHS product of NSG Company for super plasticizers.
NSG-Z90 can be used to seal concrete surfaces. To use the NSG-Z90 cement and concrete sealant, it is better to clean or remove these areas if there are cracks or severe contamination in the concrete or cement surface. If the concrete has been cleaned of any stains, cracks, etc., sealing can be started to get the best possible result. Water jets with concrete detergents should be used to clean the concrete.
Therefore, before sealing the concrete and cement surface, it is better to repair and stain all existing seams and cracks after cleaning with NSG-N50 and cement and silica or stone powder.
The NSG-Z90 milky product is based on nano-acrylic resins, and becomes completely colorless in structure after use.All surfaces sealed with NSG-Z90 are permanently sealed with cement, gypsum, brick, etc. because of complete penetration of the NSG-Z90.