The slump test is suitable for slumps of medium to low workability, slump in the range of 5 – 260 mm, the test fails to determine the difference in workability in stiff mixes which have zero slump, or for wet mixes that give a collapse slump. It is limited to concrete formed of aggregates of less than 38 mm (1.5 inch).

What are the types of slump test?

There are three types of slump that may occur in a slumps test, namely, true slump, shear slump and collapse slump.

What is zero slump?

concrete of stiff or extremely dry consistency showing no measurable slump after removal of the slump cone. (See also slump and no-slump concrete.)

Which slump is good for concrete?

Four-inch (4”) slump is very common with normal weight concrete and is a good for pumping. Slumps that are above average will cause reduced strength, durability, and permeability of the concrete. Admixtures should be used instead of water to achieve higher slumps so that you can maintain the quality of your concrete.

What are the four types of slump?

The Slump is performed according to the procedures mentioned in the ASTM C143 standard in the United States, IS 1199 – 1959 in India, and EN 12350-2 in Europe.

Types of Concrete Slump
True Slump.Shear Slump.Collapse Slump.

What is minimum slump for concrete?

Concrete Slump

Slumps are also determined by ACI standards although we can recommend the following: Reinforced foundation wall and footings: Slump shall be between 2 and 5 inches. Footings, caissons: 1-inch minimum, 4-inch maximum. Slabs, beams, building columns, and reinforced walls: 3-inch minimum and 6-inch maximum.

What is Slump value for M20 concrete?

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 does 5 inch slump mean?

The 4- to 5-inch slump for decorative concrete is a relatively stiff mixture, but not quite as stiff as the 2- to 3-inch slump seen here. A higher slumped concrete is more more fluid and will flow some distance on its own.

How is Slump value calculated?

In case of a shear slump, the slump value is measured as the difference in height between the height of the mould and the average value of the subsidence.

What is the slump of m25 grade concrete?

Mix is stable, cohesive, and workable and had a true slump of about 75 mm. So , it has achieved desired workability by satisfying the requirement of 50-75 mm slump value .

What is shear slump?

Shear slump: If one-half of the cone slides down in an inclined plane, it is called a shear slump. Shear slump indicates lack of cohesion in the concrete mix. Shear slump may occur in the case of a harsh mix.

What is maturity of concrete?

Concrete maturity indicates how far curing has progressed. Maturity is the relationship between concrete temperature, time, and strength gain. It is represented by an index value that can be measured in real time in the field.