10.3. Acceptance Criteria of RMC

Try these first

1. 1.

   What is the purpose of acceptance criteria for RMC?

   Hint

   Think about the quality assurance in construction.

2. 2.

   What two key tests are performed to check RMC strength?

   Hint

   These are related to time intervals post-mixing.

3. 3.

   What is the maximum allowable slump decrease for RMC with superplasticizers?

   • 5%
   • 10%
   • 15%

   Hint

   Consider industry standards for concrete placement.

4. 4.

   True or False: Only the 28-day cube test results are essential for RMC acceptance.

   • True
   • False

   Hint

   Reflect on the testing intervals discussed.

5. 5.

   A batch of RMC has a 28-day compressive strength of 22 MPa. The design specification was for 25 MPa. Discuss the actions that should be taken next.

   Hint

   Consider retesting the materials and reviewing admixtures used.

6. 6.

   If a contractor discovers that the slump of delivered RMC is too low upon arrival on site, what immediate steps should they take to assess and rectify the situation?

   Hint

   Think about how to balance immediate and long-term quality control.