A Cube Mould 70.6 mm is a specialized tool used in the construction and civil engineering industries for preparing concrete test specimens. These specimens are used to determine the compressive strength of concrete. Here’s a detailed description of a Cube Mould 70.6 mm:
Key Features:
1. Dimensions:
- Size: The mould forms concrete cubes with dimensions of 70.6 mm x 70.6 mm x 70.6 mm, which is a standard size for certain types of concrete testing.
2. Construction:
- Material: Typically made from cast iron or steel, ensuring durability and the ability to withstand the rigors of concrete testing.
- Finish: The inner surfaces are machined to a smooth finish to ensure easy removal of the hardened concrete specimen and accurate dimensioning.
3. Design:
- Split Type: Many 70.6 mm cube moulds are split into two halves, held together with clamps or bolts. This design allows for easy removal of the hardened concrete cube.
- Base Plate: Comes with a detachable base plate, which ensures the mould remains stable during the filling and curing process.
4. Markings:
- Identification: Often marked with size and manufacturer information for easy identification and standard compliance.
Typical Uses:
1. Compressive Strength Testing:
- Concrete Quality Control: Used to create concrete specimens for testing the compressive strength of concrete in construction projects. Ensures that the concrete mix meets the required strength specifications.
2. Research and Development:
- Material Testing: Used in laboratories to test new concrete mixes, additives, and materials to evaluate their performance and suitability for construction applications.
3. Education and Training:
- Teaching Tool: Used in educational settings to teach students about concrete properties and the importance of compressive strength testing in civil engineering.
Procedure for Use:
1. Preparation:
- Clean the mould thoroughly and apply a thin layer of mould release agent to the inner surfaces to facilitate easy removal of the hardened concrete.
2. Filling:
- Fill the mould with fresh concrete in layers, usually in three layers. Compact each layer using a tamping rod to remove air bubbles and ensure uniform density.
3. Curing:
- Cover the mould and allow the concrete to set for 24 hours. After initial setting, remove the specimen from the mould and cure it in water or a controlled environment for a specified period (commonly 28 days) to reach full strength.
4. Testing:
- Once the curing period is complete, the concrete cube is subjected to compressive strength testing using a compression testing machine.
Advantages:
- Durability: Made from strong materials, ensuring long-term use and resistance to wear and tear.
- Precision: Provides accurately dimensioned specimens, essential for reliable and consistent test results.
- Ease of Use: The split mould design and smooth finish facilitate easy removal of concrete specimens without damaging them.
Limitations:
- Weight: Can be heavy and cumbersome to handle, especially in larger quantities.
- Maintenance: Requires regular cleaning and maintenance to ensure accuracy and longevity.
Conclusion:
A Cube Mould 70.6 mm is an essential tool in the construction and civil engineering industries for preparing concrete specimens used in compressive strength testing. Its durable construction, precise dimensions, and ease of use make it invaluable for quality control, research, and educational purposes. Proper handling, maintenance, and use are crucial to obtaining accurate and reliable test results.
