Concrete crash wall formwork is an important traffic safety facility, which is widely used in highways, bridges and other occasions. In order to ensure the quality and safety of concrete crash walls, it is crucial to choose the right formwork material and size. This article will introduce in detail the conventional size, material selection, manufacturing process and precautions in the use of concrete crash wall formwork.
1. Conventional size.
The conventional size of concrete crash wall formwork is determined according to the actual needs and production process. In general, the height of the crash wall is between 80-120 cm, and the length depends on the actual need. Common lengths are 1 meter, 2 meters, 3 meters, etc., or even longer. When selecting the size of the formwork, factors such as construction requirements, transportation and storage should be fully considered to ensure the applicability and economy of the formwork.
Second, the selection of materials.
Choosing the right material is a key part of making concrete crash wall formwork. Commonly used materials are steel, aluminum and plastic, among which steel has high strength and durability, and is suitable for construction in various environments. Among the steels, Q235A carbon structural steel is one of the most commonly used materials, which has good plasticity and welding properties, and can meet the manufacturing requirements of most formwork. In addition, for the parts that need to be reinforced, Q345B low-alloy high-strength structural steel can be used to improve the overall performance of the formwork.
Third, the production process.
The manufacturing process of concrete crash wall formwork mainly includes the following steps:
1.Design: According to the actual needs and construction requirements, design a reasonable template size and structure, and determine the specifications and quantities of the required materials.
2.Blanking: According to the requirements of the design drawings, the selected materials are cut, cut and punched to produce each part of the template.
3.Assembly: Assemble the processed parts, and adjust their positions and angles to ensure that the overall structure and size of the template meet the design requirements.
4.Welding: Welding the assembled formwork to ensure its firmness and stability. During the welding process, attention should be paid to controlling the welding quality and the aesthetics of the weld.
5.Grinding: Polishing the welded template to remove defects such as burrs and welding nodules of the weld to ensure the flatness and smoothness of the surface of the template.
6.Coating: Painting the surface of the template to improve its durability and aesthetics. Common coating materials are anti-rust paint, topcoat, etc.
7.Packaging: The coated formwork is packaged to protect its quality and safety during transportation and storage. Appropriate packaging materials and methods should be selected to ensure that the template will not be damaged during transportation.
4. Precautions for use.
When using concrete crash wall formwork, the following should be noted:
1.Splicing: When splicing the template, it should be assembled in the correct order and way to ensure the firmness and stability of the template. At the same time, attention should be paid to adjusting the height and angle of the formwork to ensure the quality and appearance of concrete pouring.
2.Fixing: Before pouring concrete, the formwork should be fixed in the corresponding position to prevent it from shifting or toppling. Commonly used fixing methods include tie rod fixing, embedded parts fixing, etc.
3.Coating release agent: In order to facilitate mold removal and prolong the service life of the formwork, a layer of release agent should be applied to the surface of the formwork before pouring concrete. The release agent should be of reliable quality, and pay attention to the uniform application and no omissions.
4.Inspection and maintenance: When pouring concrete, the fastening degree and integrity of the formwork should be checked at any time, and problems should be dealt with in time. After the pouring is completed, the formwork should be cleaned and maintained to ensure its long-term use effect.
5.Storage and transportation: During storage and transportation, the template should be avoided from being violently impacted or squeezed to prevent it from being deformed or damaged. At the same time, the formwork should be kept dry and clean to prevent it from rusting or corrosion.