Non-structural cracks generally do no harm but sometimes reduce the aesthetic value of the building. Its main characteristic is the appearance of soft lines with irregular directions. According to the experts, Type & Application, non-structural cracks are divided into 3 types. On the other hand, you may also need to call the recommended concrete crack repair near you, due to wall cracks are usually connected to the foundation damage.
This type of crack occurs because too much plaster in the trowel and the sand used contains a lot of fine grains. The characteristics of crazing cracks are:
Forming cracked tissue that is smooth, shallow and not continuous.
Form a hexagonal pattern with a crack distance of 5 mm-75 mm.
Occurs within an interval of several hours after the application of plastering.
The solution to overcome this type of crazing crack is to scrape the cracks and then close it with putty.
This type of crack occurs due to the use of too much cement and plaster that is left to dry too quickly. The characteristics of cracking map cracking types are:
The crack pattern resembles a map (map).
Form a hexagonal pattern with a distance of up to 200 mm.
The crack structure tends to be deeper and continuous.
This crack occurs due to high cement content, poor sand quality and too thick plastering applied. The repair solution is to use putty. Based on the causes, shrinkage cracks can be divided into several types, including:
a. Plastic shrinkage
Plastic shrinkage occurs due to loss of excess water content when the plaster is still in plastic conditions or the beginning of the application. This crack usually occurs in the corner of the window.
b. Dry shrinkage
Shrinkage occurs due to high cement content, poor sand quality and too thick plaster
1. Shrinkage caused by changes in the volume of plastering and concrete during the chemical reaction process between cement and water.
2. Shrinkage due to carbonation.