Also known as abrasive blasting, concrete sandblasting is a process that is used to expose aggregates that are within hardened concrete. The process of blasting gives it a rustic but attractive look by surface layer erosion. During the entire process of blasting, cement color usually dominates, then the color of sand will gradually show in the revealed coarse aggregates.
Generally, there are four abrasion grades produced in the concrete sandblasting process, revealing a matt finish texture. These include light blasting, brush blasting, medium blasting, and heavy blasting. The grades depend on the type of blasting employed.
There are great advantages that result from concrete sandblasting like using the technique in concrete profiling such that it leaves the surface clean maintaining its luster. In addition, apart from its primary goal of cleaning surfaces, the process is also used in the indirect removal of paint from the surface especially when you do not intend to repaint the surface.
However, there are a few drawbacks related to concrete sandblasting, such that the blasted material has a probability of suffering damage if proper care is not taken after the process. In addition, the entire sandblasting especially on concrete surfaces causes propulsion of highly abrasive materials thus posing a risk of heat and static electricity generation. This if not controlled properly, can cause fire breakout. That’s why it’s important to work with the best concrete sandblasting company to avoid such scenarios.
Concrete Sandblasting Equipment
There is various equipment that is used in concrete sandblasting. Typically, an air nozzle, a hopper, and/or a sandblasting gun are used. The tools are subject to other factors that must be considered before employing any choice of equipment. One of the factors includes the texture of the surface of concrete, whether it is hardened and if it requires light cleaning or a deep cutting used to expose the aggregates to a depth of ¾ inch or even sometimes more. Some tools and equipment can be used in cases where there is a need for Gap-Grading which is intended to omit some intermediate coarse aggregate sizes usually included in the standard concrete mix.
Furthermore, the capacity of the equipment to be used is always an important consideration. Take for instance when the blasting is to cut deeper, the air compressor being used should have a venture-type nozzle of the capacity of approximately 300cfm and a recommended pressure of 100psi. Additionally, the hose line must withstand the pressure being used. There are other abrasive materials used in concrete sandblasting like blasting grit, hard angular sands, silica sand, and crushed chat which all must be free from foreign matter.
What to Consider While Choosing a Concrete Sandblasting Company
There are many companies out there that offer concrete sandblasting services. You have to choose one that offers the best services. Your choice of a concrete sandblasting company will depend on how you want the whole process to be carried out, and most importantly, the expected outcome of the finished work. One might also need to cross-examine and counter-check the cost quoted against the quality of services.
Some individuals may prefer texture patterns that are achieved using special templates while others would go for the natural rough texture.
If you have a concrete sandblasting job and you’re looking for a professional to handle it, be sure to hire concrete sandblasting specialists with the right tools, skills, and extensive experience to complete the job. A professional concrete sandblasting company will come in with experienced specialists and professional-grade tools to get the job done to high standards.
When choosing a concrete sandblasting company, be sure to check their reputation in the industry to guarantee good results.