Concrete quality for new jersey barrier

A very specific question!

For a concrete barrier in New Jersey, the quality requirements would depend on the specific application, location, and regulatory requirements. However, I can provide some general guidelines and standards that are commonly used in New Jersey.

ASTM Standards:

The American Society for Testing and Materials (ASTM) provides standards for concrete barriers. For a concrete barrier in New Jersey, the following ASTM standards may be relevant:

New Jersey Department of Transportation (NJDOT) Specifications:

The NJDOT has its own specifications for concrete barriers, which are outlined in the "Standard Specifications for Road and Bridge Construction" (NJDOT, 2020). For a concrete barrier in New Jersey, the following specifications may be relevant:

Quality Requirements:

To ensure the quality of a concrete barrier in New Jersey, the following requirements may be applicable:

  1. Compressive Strength: The compressive strength of the concrete should be at least 4,000 psi (27.6 MPa) at 28 days, as specified in ASTM C94/C94M-18.
  2. Slump: The slump of the concrete should be between 4 and 8 inches (10 to 20 cm), as specified in ASTM C94/C94M-18.
  3. Air Content: The air content of the concrete should be between 4 and 8%, as specified in ASTM C94/C94M-18.
  4. Aggregate: The aggregate used in the concrete should meet the requirements of ASTM C33/C33M-18.
  5. Reinforcement: The reinforcement used in the concrete barrier should meet the requirements of ASTM A615/A615M-18 or ASTM A706/A706M-18.
  6. Finish: The finish of the concrete barrier should be smooth and even, with no defects or irregularities.
  7. Testing: The concrete barrier should be tested for compressive strength, flexural strength, and impact resistance, as specified in ASTM C1437-18.

Certification:

To ensure compliance with these quality requirements, the concrete barrier should be certified by a third-party testing laboratory or a qualified inspector. The certification should include a report that outlines the test results and confirms that the concrete barrier meets the specified requirements.

Please note that these are general guidelines and that specific requirements may vary depending on the project, location, and regulatory requirements. It is recommended to consult with a qualified engineer or a concrete expert to ensure compliance with the relevant standards and specifications.