Is slump test a specification?
United States. In the United States, engineers use the ASTM standards and AASHTO specifications when referring to the concrete slump test. The American standards explicitly state that the slump cone should have a height of 12-in (300 mm), a bottom diameter of 8-in (200 mm) and an upper diameter of 4-in (100 mm).
Which apparatus is used for slump test?
Slump Cone apparatus
The Slump Cone apparatus for conducting the slump test essentially consists of a metallic mould in the form of a frustum of a cone having the internal dimensions as : Bottom diameter : 20 cm, Top diameter : 10 cm, Height : 30 cm and the thickness of the metallic sheet for the mould should not be thinner than 1.6 mm.
What does the slump test measure concrete?
Concrete slump testing is a quick and easy procedure that can be performed in real-time and on-site that is used to determine the workability as well as the consistency of fresh concrete. Concrete with slump values that are too low or too high can be identified and corrected prior to use.
What is meant by Workability?
Workability is also defined as the amount of useful internal work necessary to produce full compaction of concrete. Workability is the property that determines the effort required to manipulate a freshly mixed quantity of concrete with minimum loss of homogeneity.
How do you perform a slump test?
Performing the Test: Patient is seated upright with hands held together behind his/her back. The examiner instructs to the patient to flex his/her spine (slump), followed by neck flexion. The examiner then places his/her hand on top of head and has the patient perform knee extension, and dorsiflexion of foot.
Why do we use slump test?
A concrete slump test measures the consistency of a concrete batch to see how easily the concrete will flow. The test not only observes consistency between batches, but it also identifies defects in a mix, giving the operator a chance to amend the mix before it is poured on site.
How do you measure workability?
- Slump Test. The concrete slump test or slump cone test is the most common test for workability of freshly mixed concrete which can be performed either at the working site/field or in the laboratory.
- Compaction Factor Test.
- Flow Test.
- Vee Bee Consistometer Test.
- Kelly Ball Test (Ball Penetration Test)
Which equipment is used to test the workability?
Slump Testing Concrete slump test equipment is used to measure the consistency and workability of fresh concrete, and indirectly, the water/cement ratio of the concrete mix.
What is the procedure of concrete slump test?
Procedure of Concrete Slump test: The mold for the concrete slump test is a frustum of a cone, 300 mm (12 in) of height. The base is 200 mm (8in) in diameter and it has a smaller opening at the top of 100 mm (4 in). The base is placed on a smooth surface and the container is filled with concrete in three layers, whose workability is to be tested.
What are the ASTM standards for slump testing?
The ASTM standards also state in the procedure that when the cone is removed, it should be lifted up vertically, without any rotational movement at all. The concrete slump test is known as “Standard Test Method for Slump of Hydraulic-Cement Concrete” and carries the code (ASTM C 143) or (AASHTO T 119).
What is the size of the slump test cone?
The mold for the slump test is a frustum of a cone, 300 mm (12 in) of height. The base is 200 mm (8in) in diameter and it has a smaller opening at the top of 100 mm (4 in).
What is the maximum size of aggregate in a slump test?
Table : Workability, Slump and Compacting Factor of concrete with 19 or 38 mm (3/4 or 1 1 / 2 in) maximum size of aggregate. The concrete slump test is referred to in several testing and building code, with minor differences in the details of performing the test.