Who is responsible for mixing and forming test sample refractories?

The responsibility for mixing and forming test sample refractories typically falls on the contractor. This is primarily due to the contractor's role in the execution of the project, including the selection and preparation of materials used in the construction process. The contractor is directly involved in ensuring that the composition and properties of the refractories meet the required specifications and standards, as dictated by the project requirements.

In the context of refractory work, the contractor has the technical expertise and resources to prepare test samples correctly and ensure consistency in the mixing process. This is essential in testing scenarios where the refractories' performance must reflect their behavior under operational conditions.

The project manager, while integral in overseeing the entire project, is generally not involved in the hands-on preparation of the materials. Similarly, the owner typically delegates responsibilities to the contractor and is focused on project objectives rather than material preparation. The testing facility is usually responsible for conducting tests and evaluations rather than mixing or forming the test samples themselves, which aligns with the contractor's responsibilities. Thus, the contractor's role is crucial in the initial stages of preparing refractory materials for testing.