Classification: frequently asked questions
Issued on: March 8, 2023 15:49
Browses
The most important thing in the construction industry is the safety of the project. After all, many people will live in the future. If the quality is not up to the standard, or low-quality products are used, then the harm is very great.
The concrete cushion block has always been trusted by the market for its reliable quality. Today, let's have a detailed understanding of the application of concrete cushion block in the construction industry.
The first point: the thickness of the concrete cover of the reinforcement is related to the bearing capacity, durability, fire prevention and other properties of the structure.
The second point: the protective layer in the concrete for maintaining the durability of the structure is too thin, which is easy to infiltrate damp gas and water, and too thick, which is easy to produce cracks, which may cause corrosion and expansion of the reinforcement, thus causing damage to the concrete, affecting the use and structural stability.
Third point: concrete cushion blocks, also known as rebar cover cushion blocks, are placed under beams in brick concrete structures to expand the bearing area, which is a common method to solve local bearing.
Fourth point: The protective layer under the action of external force has anchoring force to the reinforcement. The anchoring force between the concrete and reinforcement is used, and the two are closely combined to participate in the work together. When the protective layer is too thin or missing, its anchoring force will be reduced, thus reducing the resistance of the structure to axial force and bending moment.
Fifth point: The concrete of the fire protection layer has a certain thermal insulation effect, which can protect the steel bars that are easy to soften in case of fire. If the thickness of the protective layer is too thin, it is easy to crack in the high temperature environment, resulting in the strength reduction of the steel bars due to overheating, thus damaging the overall structure.
Therefore, more and more attention is paid to the control of the thickness of the protective layer in the current quality acceptance work, and the new specification stipulates that the entity should be carried out in the acceptance process.
