Determination of hydraulic shrinkage

Category

Measure axial and/or surface dimensional shrinkage of concrete samples during the hardening process in a curing room.

STANDARDS: UNI 11307 | UNI 6555 (comparable to ASTM C426)

The sample is prepared by means of a mold of dimensions 100x100x500 mm, with aggregates up to a maximum of 30 mm. diameter, and then lodged in the measuring device that determines the axial shrinkage.

The two UNI Standards require two different systems for sample preparation:

  • UNI 11307 requires reference pins to be glued into the sample.
  • UNI 6555 requires inserts fixed in the mold and placed in the sample.