Chapter 8 Precast Concrete
Precast Concrete (CASE Guidelines)
1. Plant Certification / Quality Control Procedures
Review plant operations and quality control procedures.
2. Mix Design
Inspect concrete batching operations and verify compliance with approved mix design
3. Material Certification
4. Reinforcement Installation
Inspect size, spacing, position and grade of reinforcing steel. Verify that reinforcing bars are free of form oil or other deleterious materials.
5. Prestress Operations
Inspect placement, stressing, grouting and protection of prestressing tendons
6. Connections / Embedded Items
8. Concrete Placement
Inspect placement of concrete. Verify that concrete conveyance and depositing avoids segregation or contamination. Verify that concrete is properly consolidated .
9. Sampling and Testing of Concrete
Test concrete compressive strength (ASTM C31 & C39), slump (ASTM C143), air-content (ASTM C231 or C173) and temperature (ASTM C1064).
10. Curing and Protection
Inspect curing, cold weather protection and hot weather protection procedures.
11. Erected Precast Elements
Inspect erection of precast concrete including member configuration, connections, welding and grouting.