What are the apparatus used for slump test?
What are the apparatus used for slump test?
Standard sets include a slump cone, base, and tamping rod. Deluxe sets also include a scoop, funnel, measuring tape, and cleaning brush.
How is the slump test measured?
The slump is measured by placing the cone just besides the slump concrete and the temping rod is placed over the cone so that it should also come over the area of slumped concrete. The decrease in height of concrete to that of mold is noted with scale. (usually measured to the nearest 5 mm (1/4 in).
What are the three types of slump?
There are three types of slump that may occur in a slumps test, namely, true slump, shear slump and collapse slump.
Which apparatus are used to measure the workability of concrete?
Slump Test Apparatus Following apparatus are used for performing the slump test, Slump Test Cone (Mould) Tamping rod.
How do you use Vicat apparatus?
Tap the mould to remove any bubbles of air. Place the mould along with the plate under the rod and plunger attached with the apparatus. Lower the plunger gradually till it touches the surface of the mould and then releases it quickly.
What is Slump value for M20 concrete?
between 100 and 160 mm
workability for M20 grade of normal concrete was achieved due to the 0.5 water-cement ratio and 2% super plasticizer. The range of slump value was in between 100 and 160 mm and it is illus- trated in Table 3.
What is slump height?
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). The soft SI conversions provided in the standard allow using the same dimension slump cones as those described in other standards.
What is Kelly ball test?
The Kelly Ball test is a simple field method for determining the consistency of plastic concrete. It is made by measuring the penetration of a 30-pound metal “ball” into the surface of the concrete. This test can be made on the concrete in place and can be made easier and faster than the slump test.
What does 0 mm slump mean?
We can classify the result within some ranges according to the slump value. Very low workability: slump value 0-25mm or 0-1 inch. Low workability: slump value 25-50mm or 1-2 inch. Medium workability: slump value 50-100mm or 2-4 inch. High workability: slump value 100-175mm or 4-7 inch.
What is Vicat apparatus?
Definition of Vicat apparatus : a device for determining the normal consistency and time of setting of portland cements that consists of a rod weighing 300 grams, having a needle in each end, and supported in a frame with a graduated scale to measure the distance to which the needle penetrates the cement.
Which oil is used for Vicat apparatus?
The use of 3-in-1, Singer oil or any equivalent oil of low viscosity is recommended. The mould (3) is in the form of a frustum of a cone with an internal diameter of 70 mm at the lower end and 80 mm at the upper end, with a height of 40 ± 0.2 mm.
What is K slump?
K slump test is an instant & direct test where slump value is evaluated in one minute. It has a tester which is inserted in fresh concrete to measure the slump value of concrete. K slump test is also useful for finding the relative workability of concrete.
What is Gillmore apparatus?
Gillmore Needle Apparatus is used to determine initial and final set times of Portland cement, masonry cement, hydraulic hydrated lime, and certain mortars in accordance with ASTM C266 and other standards.
What is Vicat needle?
The Vicat test is used for testing materials that have no real melting points. The main principle is that it measures the temperature at which a flat ended needle is able to penetrate the sample. This is known as the softening point of the material.
What is the height of slump cone?
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).
What is the are of the needle in the Vicat apparatus?
Needle for Initial Setting Time: The needle is having a cross sectional area of 1mm². The end of the needle is flat. Needle for Final Setting Time: The needle is circular and is having a cross sectional area of 1mm².
What are the units of compaction?
The degree of compaction is measured by dry unit weight and depends on the water content and compactive effort (weight of hammer, number of impacts, weight of roller, number of passes). For a given compactive effort, the maximum dry unit weight occurs at an optimum water content.