ACI Concrete Field Testing Technician - Grade I Practice Exam

What material can be used to make the tamping rod, according to the requirements?

1. Aluminum

2. Steel

3. High-density polyethylene or equal

4. Both steel and high-density polyethylene

The correct answer is: Both steel and high-density polyethylene

The requirements for the tamping rod used in concrete testing specify that it should be made from materials that are durable and capable of effectively compacting concrete without causing any contamination or alteration to the test results. Steel is a commonly used material due to its strength, durability, and resistance to wear. High-density polyethylene is also acceptable as it is non-reactive and will not affect the concrete mix. Using either of these materials fulfills the necessary criteria for a proper tamping rod, allowing for consistent results during testing. Therefore, the option that includes both steel and high-density polyethylene accurately reflects the acceptable materials for the tamping rod as outlined in industry standards.