What is a typical acceptable concrete slump value?
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What is a typical acceptable concrete slump value?
Very dry mixes having slump 0 – 25 mm are typically used in constructing pavements or roads, low workability mixes having slump 10 – 40 mm are typically used for foundations with light reinforcement, medium workability mixes with slump 50 – 90 mm, are typically used for normal reinforced concrete placed with vibration.
What is the slump of M20 concrete?
between 100 and 160 mm
The slump value for M20 concrete is between 100 and 160 mm.
Which type of slump is good for concrete?
True slump: In a true slump concrete just subsides shortly and more or less maintain the mould shape. This type of slump is most desirable. Shear slump: If one-half of the cone slides down in an inclined plane, it is called a shear slump.
What is the slump value for m35 concrete?
A Study on Self Compacting Concrete of M35 Grade
| Test on Fresh Concrete | Recommended Limits |
|---|---|
| Slump Flow | 550-850 mm |
| T500 | 3-7 secs |
| L-Box Test | 0.8 – 1.0 |
| V-Funnel Test | 7 – 27secs |
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.
How do you calculate concrete slump?
Place the cone next to the mound of wet concrete and put the steel bar level on top of it, extending over the top of the mound. Immediately measure the distance between the bottom of the steel bar and the top of the concrete mound. The distance, measured to the nearest 1/4 inch is the concrete slump.
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 are the 4 types of slump?
There are three types of slump that may occur in a slumps test, namely, true slump, shear slump and collapse slump.