One of the major adventures of civilization is construction .With the passing times in growth of population, today construction activity is at its peak .Even with the advancement of technology the quality of construction largely depends upon the ingredients used to construct any building. One such ingredient is sand, which is one of the most essential components to give shape to the dreams of the people. Natural sand has been the main source of fine aggregates, since man began to use concrete and masonry. The fact remains undisputed that the river sand that has been produced by rivers in natural processes has not increased for ages. Down the years, these river sand deposits have been exploited to the fullest extent. This indiscriminate exploitation causing almost an irreversible damage to the river system are leading to ecological damage, ground water depletion, water scarcity and fall in farm production. Above all, illegal quarrying and use of filter sand is nothing but playing with human lives. Most of the state governments of India are imposing environmental ban on the dredging operations and all sand quarrying operations in most of the areas. This leads to the development of another latest technology, alternative to the river sand –ROBOSAND

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

2. CONTENTS
:
1. INTRODUCTION
2. MANUFACTURE OF ROBO SAND
3. HOW ROBOSAND IS SUPERIOR TO
RIVERSAND?
4. MONITORING THE QUALITY OF ROBOSAND
5. RIVER SAND VS ROBOSAND
6. ADVANTAGES
7. CONCLUSION
8. REFERENCES

3. INTRODUCTION

:
Sand
 Dredging of creeks and river beds R
O
 Not consistent in size and gradation
B
 Composition of clay, silt, marine products, O
 S
moisture and organic impurities and
A
N
other unwanted material. D
 Poor quality

4. 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.

5. MANUFACTURE OF
ROBOSAND :-
SAND MANUFACTURING
MACHINE

6. SCREENING EQUIPMENT

7. FINAL PRODUCT (ROBO SAND)

8. HOW ROBOSAND IS
SUPERIOR TO RIVER
SAND
 Particle ShaPe
 high-comPreSSion Strength
 greater Durability
 truckloaDS of aDvantageS
 DoeS away with conStuction DefectS
 SuPerior Qualit
 greater economy SavingS
 eaSy availabilty

9. MONITORING THE QUALITY OF ROBOSAND
 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

10. TesT on concreTe making maTerial wiTh roBosanD
anD river sanD as ingreDienTs cemenT (as per is 4031-
1988) 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

11. Coarse aggregate (as per IS: 2386-1963 & IS: 383-1970)
RIVER SAND ROBOSAND
Specific Gravity 2.71 2.71
Water absorption % by wt. 0.42 0.42
Sand (as per IS: 2386-1963 & IS: 383-1970)
RIVER SAND ROBOSAND
Specific Gravity 2.52 2.52
Water absorption % by wt. 0.20 0.20
Material finer than 75 micron 0.04 0.08
(% by weight)

12. Laboratory Trial Mix Design Test Results
RIVER SAND ROBOSAND
Water cement ratio 0.5 0.5
Workability value of slumping in 65 50
mm
Compressive strength of concrete 37 44
cubes at 28 days N/sq. mm
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

13. 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

14. CONCLUSIO
N :
 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”.

15. REFERENCES
:
 WWW.ROBOSAND.COM
 THE HINDU PROPERTY PLUS
( Saturday, Jul 02, 2005)

16. ?
R.RAGHAVENDRA