Concrete specifications for new jersey barrier

Here are some common concrete specifications for a New Jersey-style barrier:

General Requirements

• The barrier shall be constructed of concrete with a minimum compressive strength of 4,000 psi (pounds per square inch) at 28 days.
• The concrete shall be mixed and placed in accordance with the American Concrete Institute (ACI) standards.
• The barrier shall be designed and constructed to withstand the forces of wind, water, and traffic.

Concrete Mix Design

• The concrete mix shall consist of:
  • Cement: Type I or Type II, as specified by the American Society for Testing and Materials (ASTM) C150.
  • Aggregates: Crushed stone or gravel, with a maximum size of 1 inch (2.54 cm).
  • Water: Potable water, free from contaminants.
  • Admixtures: Air-entraining agents, as specified by the ASTM C260.
• The concrete mix shall have a slump of 4-6 inches (10-15 cm) and a air content of 5-7%.

Barrier Design

• The barrier shall be a precast concrete barrier, with a minimum height of 30 inches (76 cm) and a minimum width of 12 inches (30 cm).
• The barrier shall have a flat top and a sloping face, with a minimum slope of 1:1 (horizontal to vertical).
• The barrier shall be designed to withstand a minimum impact force of 10,000 pounds (4,500 kg) at a speed of 30 mph (48 km/h).

Reinforcement

• The barrier shall be reinforced with steel rebar, with a minimum yield strength of 60,000 psi (414 MPa).
• The rebar shall be spaced at a maximum of 12 inches (30 cm) on center, and shall be anchored to the concrete with epoxy-coated anchors.

Finishing

• The concrete shall be finished with a smooth, even surface, free from defects and imperfections.
• The barrier shall be sealed with a clear sealant, to protect it from the elements and extend its lifespan.

Testing and Inspection

• The concrete shall be tested for compressive strength, slump, and air content, in accordance with the ACI standards.
• The barrier shall be inspected for defects and imperfections, and shall be repaired or replaced as necessary.

Certification

• The manufacturer of the concrete barrier shall provide certification that the barrier meets the specified requirements, and shall provide documentation of the testing and inspection procedures used to verify compliance.

Warranty

• The manufacturer of the concrete barrier shall provide a warranty that the barrier will meet the specified requirements for a minimum of 10 years.

Please note that these specifications are general guidelines and may need to be modified to meet specific project requirements or local regulations. It's always best to consult with a qualified engineer or architect to ensure that the specifications meet the needs of the project.