Answer / mitesh patel

# Floors in factories and industries have concrete being the
most versatile of flooring material, has been in use for a
long time. To overcome the deficiencies of concrete a system
was devised to improve the properties of such concrete
floors. This system is "Vacuum Dewatered Floors.
Process:
In this system, concrete is poured in place & vibrated with
a poker vibrator. Then a screed vibrator is run over the
surface, supported on channel shuttering spaced 4.0 meters
apart. The screed vibrator is run twice to achieve optimum
compaction & leveling. After this a system of lower mats &
top mat is laid on the green concrete & this is attached to
a vacuum pump. This draws out excess water.
Benefits:
1. Compressive strength of floor increases by upto 60%
2. Tensile strength increases by @ 70%
3. Cement consumption is reduced to the extent of 40%, no
cement is required separately for finishing the surface.
4. Abrasion resistance of the floor increases by @ 60%
resulting in less wear and rear of the floor surface.
5. Shrinkage of concrete is reduced and floor wraps less.

Answer / sureshpittas

vdf flooring means Vaccum Dewatering flooring... vdf
flooring is used for smooth surface area of
flooring..Generally vdf flooring used for parking area why
beacause it easy to move freely .vdf flooring is not only
for parking areas but also we can use any floors... And we
can use M25, M30 M35, M40 Concrete...and Hardener bag must
be used for 1SQMETER -3kgs should be used compulsory.

Answer / p.simhachalam

sir how to repair the vdf top surface ,if in case damaged

m20 grate concret mix,if sand&agregate take by wights for 1 bag cement so how much any formula?

2 Answers  

---

how to check and keep control on the wastage of material at site

0 Answers   Aashray Design Consultants, ABC Infra, Jain Group,

---

plz. how many times required for compacting subbgrade in road way & how many water required?

1 Answers   Sail,

---

How much form and scaffolding per cubic meter volume of concrete class ''A'', ''B'', and ''C''

0 Answers  

---

why grading of cement is like 33,43,53?why not 25,35,45?

1 Answers   Gokaraju Rangaraju Institute of Engineering and Technology GRIET,

---

---

# 1. size of the Bricks # 2. Minimum Crushing Strength of Bricks

5 Answers   Brigade,

---

In an aggregate blending plant, water is sprayed before blending is performed. If the fine content in aggregate is as high as 25 %, will not the fines form into lumps / balls and distribution will not be uniform ? Further, the fines will stick onto the interior of pug mill and its content will be low. The mixed material is stockpiled for weeks / months before use. Will it not be better that blending is done in dry condition, and water will be added only during compaction at site. Please forward your comments and suggestions.

0 Answers  

---

What is the bearing capacity of black cotton soil, normal soil and rock?

2 Answers   Gammon, Mid India,

---

how to caluclate sienerge qty in construction in ap

0 Answers   Rites, VR Residency,

---

what is the different betweem expansion and construction joints

2 Answers  

---

Special thing in designing a overhead reservoir ? which is different from an ordinary design

0 Answers  

---

how much quantity of work we can get by rod benders per day

3 Answers   IVRCL, NCC, OWDM,

---