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What is the slump value for mass concrete work?
Concrete for road construction 20 to 40 mm. Concrete for tops of curbs, parapets, piers, slabs and wall 40 to 50 mm. Concrete for canal lining 70 to 80 mm. Normal RCC work 80 to 150 mm.
What is the range of slump mm of the concrete which is used as the mass concrete?
Allowable Slump Values
| WORK | ALLOWABLE RANGE |
|---|---|
| Column | 50 mm to 150 mm |
| Beam | |
| Wall | |
| Mass Concrete | 25 mm to 75 mm |
What is Slump loss?
Fresh concrete is well known to lose its workability with time. This phenomenon is called ‘slump loss‘. To improve slump retention with PNS or PMS, of which the action is often limited in time, addition of set-retarding water reducers, typically lignosulfonates, was found to be quite adequate.
What slump means?
To slump is to fall or slouch down. It’s also a downturn in performance — a struggling ballplayer and a sinking economy are both in a slump. There are many kinds of slumps, but they all involve things going downhill. If you slide down in your chair, you slump.
What does slump of concrete mean?
Slump. Slump is the measure of concrete consistency and fluidity. It shows the flow and overall workability of freshly mixed concrete. Simply put, the higher the slump, the wetter the mix. Four-inch (4”) slump is very common with normal weight concrete and is a good for pumping.
How do you perform a concrete slump test?
DIY Concrete Slump Test
- Poke a 1/4″ hole in the bottom of the plastic cup with the pen to allow air to escape.
- Fill the cup with freshly mixed concrete and pack it well.
- Place the filled cup upside-down on a flat, rigid surface.
- With your hands, carefully vibrate the cup in a steady lifting motion without stopping.