NEWS | SOFTWARE | SHEET
How to do a Concrete Slump Test
The purpose of the concrete slump test is to determine the workability or efficiency of concrete. Furthermore, concrete is contemplated as effectual or workable once it comprises robust strength.
Workability of Concrete
Workability signifies a combined characteristic of concrete that describes how smoothly newly mixed concrete is amalgamated, set, consolidated as well as finished with minimal loss of consistency. The amount of water, aggregate grade and percentage of fine materials in the combination have an effect on workability.
In order to find out the workability of concrete, the subsequent tests are generally carried out.
- Assessment A. Slump test
- Assessment B. Compaction factor test
- Assessment C. Flow test
- Assessment D. Kelly ball test
- Assessment E. Vee-Bee consistometer test
- Assessment F. K-Slump Test
Slump Cone Test of Concrete or Concrete Slump Cone Test
The major purpose of slump cone test or concrete slump test is to determine the uniformity or workability of concrete mix formed at the lab or the construction site throughout the progression of the work. Furthermore, a concrete slump test is carried out from set to set to confirm the consistent quality of concrete during the construction.
Generally, the workability is decided through the concrete slump value, that denotes water-cement ratio, however there’re even numerous additional aspects that go from mixing techniques, characteristics of materials, admixtures, dosage, and so forth to affect the concrete slump value.
Furthermore, the concrete slump test isn’t suggested for highly wet or highly dry concrete.
That test is utilized like a comparison test and shows the constancy of concrete from set to set. Recurring sets of an analogous mix, offered to the same slump, is going to comprise the same water content as well as water-cement ratio, weights of cement, aggregate, as well as admixtures are uniform as well as aggregate grading lies within adequate limits or parameters.
Tools Utilized for Slump Test of Concrete
The required apparatus go from Mettalic Mould that is in the form of frustum cone, a tamping rod comprising bullet end, tape or scale for calculating the slump. Furthermore, metallic sheet for setting or arranging Slump as well as trowel with respect to pour concrete in the slump.
Moreover, the mold with respect to the test lies in the shape of the frustum of a cone having bottom diameter 20 cm, height 30 cm, as well as top diameter ten cm. Moreover, the tamping rod must be made from steel having 16 mm diameter as well as 60 cm length as well as rounded at an end.
- Metallic Mould
- Tamping Rod
- Scale / Tape
- Metallic Sheet
- Trowel
Procedure for Concrete Slump Cone Test
Initial Step: Clean the internal surface of Frustum cone appropriately as well as it doesn’t comprise any moisture content as well as adhesion of somewhat old set concrete.
2nd Step: Afterwards, set the Mould (Cone) on a smooth surface or metallic steel plate.
3rd Step: Put the concrete in 4 layers each to fill the cone maintaining a quite precise height of one-fourth of the mold.
4th Step: Utilize the tamping rod in order to tamp each layer twenty five times in order to allocate the strokes uniformly throughout the cross section.
5th Step: When the fourth layer is filled, the concrete is detached using the trowel.
6th Step: The mold is removed out of the concrete directly in an upward direction through lifting it progressively and carefully.
Last Step: It eases the concrete to settle or subside. That settling is called a slump.
