Presentation on robosand @ crit by raghavendra
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Transcript of Presentation on robosand @ crit by raghavendra
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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