JNTU COLLEGE OF ENGINEERING,ANANTAPUR. PRESENTATION BY…. R.RAGHAVENDRA III/IV B.Tech, Civil

CONTENTS :1. INTRODUCTION2. MANUFACTURE OF ROBO SAND3. HOW ROBOSAND IS SUPERIOR TO

RIVERSAND?4. MONITORING THE QUALITY OF ROBOSAND5. RIVER SAND VS ROBOSAND6. ADVANTAGES7. CONCLUSION8. REFERENCES

INTRODUCTION : Sand

Dredging of creeks and river beds

Not consistent in size and gradation

Composition of clay, silt, marine products,

moisture and organic impurities and

other unwanted material.

Poor quality

ROBOSAND

WHAT IS ROBOSAND:

ROBOSAND is sand manufactured, obtained from specific natural granite using the

state-of - the – art European technology. Its numerous advantages over river sand

have made it a favorite and a “Must- to- use” with quality conscious builders.

MANUFACTURE OF ROBOSAND :-

SAND MANUFACTURING MACHINE

SCREENING EQUIPMENT

FINAL PRODUCT (ROBO SAND)

Particle Shape High-Compression Strength Greater Durability Truckloads of advantages Does away with constuction defects Superior Qualit Greater Economy Savings Easy Availabilty

HOW ROBOSAND IS SUPERIOR TO RIVER SAND

Sieve analysis Optical microscopic study to check the paricle size Workability ( slump test by slump cone

method) Cube test for compressive

strength Various mix designs

MONITORING THE QUALITY OF ROBOSAND

RIVER SAND ROBOSAND

3 days compressive strength 33.0 M Pa 33.0 M Pa

7 days compressive strength 39.0 M Pa 39.0 M Pa

28 days compressive strength

49.0 M Pa 49.0 M Pa

setting times initial 190 min 190 min

final 290 min 290 min

Fineness (’s) 308 sq. m/Kg 308 sq. m/Kg

Test on concrete making material with ROBOSAND and river sand as ingredients Cement (As per IS 4031- 1988)

RIVER SAND ROBOSAND

Specific Gravity 2.71 2.71

Water absorption % by wt. 0.42 0.42

RIVER SAND ROBOSAND

Specific Gravity 2.52 2.52

Water absorption % by wt. 0.20 0.20

Material finer than 75 micron

(% by weight)

0.04 0.08

Coarse aggregate (as per IS: 2386-1963 & IS: 383-1970)

Sand (as per IS: 2386-1963 & IS: 383-1970)

RIVER SAND ROBOSAND

Water cement ratio 0.5 0.5

Workability value of slumping in

mm

65 50

Compressive strength of concrete

cubes at 28 days N/sq. mm

37 44

RIVER SAND ROBOSAND

Marine Products 2- 4% Nil

Over Sized Material 6- 8% Nil

Clay & Silt 5-8% Nil

Moisture 4-5% Nil

Total 17- 25% Nil

Laboratory Trial Mix Design Test Results

ADVANTAGES:1. Cheaper Great saving

2. No impurities No wastage

3. Superior building Saving substantially

strength and physical on cement cost

properties

4. Consistent gradation Screening avoided

5. “GREEN SAND” Eco friendly product

6. Ever available

CONCLUSION : The Government of India is in the process of imposing ban regulation norms on digging on riverbeds. This comes in the midst of growing environmental concerns and greater awareness of protection of nature bounties. When that happens river sand will become a scarce item. And what happens next, go for alternatives. The alternative is Guess what - Manufactured and quality sand “RaboSand”.

REFERENCES :

WWW.ROBOSAND.COM

THE HINDU PROPERTY PLUS

( Saturday, Jul 02, 2005)

R.RAGHAVENDRA

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