Video summary

Cómo se hace la prueba de Revenimiento del Concreto

Main summary

Key takeaways

Educational

Main ideas / lessons

  • The video explains how to perform the concrete slump (revenimiento) test, also known as the slump test.
  • Purpose: determine concrete workability—how easy it is to place, handle, and compact the concrete.
  • The key output is the slump value, measured as the difference in height after the cone is lifted.

Methodology / step-by-step procedure (detailed)

Equipment needed

  • Standard slump cone (Abrams cone)
  • Small scoop (to take/fill the concrete sample)
  • Smooth, round-tipped compaction rod
  • Measuring tape
  • Metal plate (to place the cone on)

Preparation

  • Take a concrete sample and homogenize the mix (ensure it’s uniform).
  • Clean and moisten the slump cone beforehand.
  • Place the cone on a clean, firm, level, non-absorbent metal plate.

Filling and compaction (in 3 layers)

  1. Stand firmly on the cone’s stirrups (located on the sides).
  2. Fill the cone with concrete to 1/3 of its volume.
  3. Compact the first layer with the rod using 25 strokes.
  4. Fill the cone to 2/3 of its volume (second layer).
    • Compact this layer with 25 strokes.
    • Use the same principle as shown: lightly compact the previous layer so the rod interacts appropriately at the layer boundary.
  5. Fill the cone to the top with the third layer (it should overflow slightly).
    • Compact with 25 strokes.
    • The rod should go up to the top of the second layer, not all the way down to the first layer.

Finishing

  • Level the surface using a steel rod with a rolling motion.

Cone lifting

  • Clean concrete around the base and top of the cone.
  • Lift the cone carefully and vertically.
  • Ensure the concrete mixture does not move laterally during lifting.

Measurement (slump value)

  • Measure the vertical drop (slump) as the difference between:
    • the center reference point of the mixture top, and
    • the top after lifting.
  • The subtitles indicate an example result: “Lower part of rod 14… we already get the slump 15.”

Acceptance / failure criteria and actions

  • If the slump is out of tolerance (too high or too low):
    • Take another sample.
  • If the second sample also fails:
    • Reject the remaining mixture.

Speakers / sources featured

  • Eling David (speaker/host, presenting the test)

Original video