Cseb

FACULTY OF ARCHITECTURE

JAGANNATH UNIVERSITYJAIPUR

CONSTRUCTION MATERIALTOPIC:- C.S.E.B ( COMPRESSED STABILIZED

EARTH BLOCKS)

SUBMITTED TO:AR. MANISH JAIN

INTRODUCTION

• COMPRESSED EARTH BLOCKS ARE DEFINED AS EARTHEN BRICKS CREATED BY MEANS OF COMPRESSION IN HAND-OPERATED OR HYDRAULIC MACHINES.

• COMMERCIALLY AVAILABLE MACHINES MAKE BLOCKS UP TO APPROXIMATELY 10 X 14 X 4 INCHES WHICH ARE STACKED TO FORM A WALL, AND STABILIZERS SUCH AS PORTLAND CEMENT, LIME, GYPSUM, AND OTHER CHEMICAL STABILIZERS CAN BE USED ALONG WITH THE SOIL IN THE BRICKS. STABILIZATION CAN ALSO BE ACHIEVED PHYSICALLY WITHOUT CHEMICAL ADDITIVES BY USING COMPACTION AND GRANULAR STABILIZATION.

C.S.E.B BLOCKS

MATERIALS USED IN C.S.E.B.

• CEMENT

• SOIL• SAND

• SILT

• CLAY

• GRAVEL

• WATER

Gravel (mm)

Sand(mm) Silt(mm) Clay(mm)

20 to 2mm 2 – 0.02 0.02 – 0.002 0.002 - 0

C.S.E.B CONSTRUCTION

IT IS DIVIDED INTO 4 PHASES

1. DIGGING THE SOIL THE SOIL IS DUG OUT FROM THE TOP LAYER OF EARTH.

2. MIXING OF STABILIZER(CEMENT) AND SOIL.

THE SOIL IS MIXED PROPERLY WITH CEMENT IN PROPORTIONATE RATIOS.

3. ADDING WATER AND PREPARING THE SOIL FOR COMPRESSION.

THE SOIL - CEMENT MIX ALONG WITH WATER IS AGAIN MIXED AND WORKABLE MIX FOR COMPRESSION IS PREPARED.

4. COMPRESSION OF THE MIX.

THE PREPARED MIX IS THEN COMPRESSED IN COMPRESSING MACHINE, AND KEPT FOR DRYING AND FURTHER USE.

MIX PROPORTIONS

• CEMENT : SOIL (1 : 6)

• WATER CONTENT = 25 LITERS FOR ONE BAG OF CEMENT

• VARYING THE RATIO ESP. THE CEMENT HAS THE PROPORTIONATE COST INVOLVED

• THE RATIO CAN GO UP TO 1 CEMENT TO 10 SOIL.

SOME BASIC DATA ON C.S.E.B.

Properties Values

Dry Compressive Strength @28days3 – 6Mpa (N/sqmm) ( +10% after 1

year, 20% after 2years)

Wet compressive strength @28days (3days immersion)

2 – 3 Mpa

Dry bending Strength @28days 0.5 – 1 Mps

Dry Shear Strength @28days 0.4 – 0.6Mpa

Density 1700 to 2000kg/cum

Water absorption @ 28days after 3 days immersion 8 to 12 % by weight

Energy Consumption 110MJ ( Kiln fired bricks = 539MJ)

COMPARISON WITH OTHER BUILDING BLOCKS.

Properties CSEB (HI - 245)

Ordinary class III brick

Concrete hollow blocks

Size 245x 245 x 95 195 x 95 x 75 390 x 190 x 190

Weight 8kg 3kg 16kg

Compressive strength (28days)

30 – 60kg/cmsq 35kg/cmsq 45kg/cmsq(approx)

Cost (Nu.) 13 per block ( 1:6 mix ratio)

11 per brick @ Thimphu

38.00 per block @ Thimphu

For a 250mm thick 1msq wall in a load bearing building @ ThimphuBlock Numbers Cost(Nu)

HI - CSEB 40(Approx) 520

Ordinary second class brick

166(approx) 1496.00

Hollow concrete Block 19.5(approx) 741

Comparative analysis done in thimphu, tibet

BLOCK PRODUCTION MACHINES

2) AURUM PRESS 3000 – Auroville,India

1) HI – CSEB Block machine – Habitech centre, ThailandDesigner/ manufacturer

Habitat centre , Bangkok

Cost of Press 73,500.00 (Nu) 2008 rate

Cost of Mould ( 1 set)

-

Max Blocks size 300 x 150 x 95

Production capacity per day ( 6- 7

workers)

500 average

Designer/ manufacturer Auroville Earth institute/ Aureka,

Cost of Press Rs 69,800.00

Cost of Mould ( 1 set) Rs 41,500.00

Max Blocks size 245 x 245 x 95

Compression force 150KN( 15 tones)

Production capacity per day with 7 workers

500 Blocks (average)

MAKING OF C.S.E.B. BLOCKS (HABITECH CENTRE, THAILAND)

HOLLOW INTERLOCKING –COMPRESSED STABILIZED EARTH BLOCK (HI-CSEB)

HOLLOW INTERLOCKING –COMPRESSED STABILIZED EARTH BLOCK (HI-CSEB)

COMPRESSED STABILIZED EARTH BLOCK CONSTRUCTION

COMPRESSED STABILIZED EARTH BLOCK CONSTRUCTION

1. USE OF CHEAP & LOCALLY AVAILABLE MATERIALS

2. JOB OPPORTUNITY FOR LOCAL PEOPLE

3. BIODEGRADABLE MATERIALS

4. ENERGY EFFICIENCY AND ECO FRIENDLINESS 5 – 15 TIMES LESS ENERGY CONSUMED THAN FIRED BRICK AND AROUND 3 – 8 TIMES LESS EMISSION

5. TRANSFERABLE TECHNOLOGY

6. IMPORT REDUCTION

ADVANTAGES OF C.S.E.B.

7. COST EFFECTIVENESS

8. MINIMUM MORTAR REQUIRED

9. KEYS THAT INTERLOCK WITH EACH OTHER PROVIDES BETTER INTEGRITY

10. HOLLOW PROVISIONS FOR LAYING VERTICAL AND HORIZONTAL REINFORCEMENTS TO IMPROVE THE LATERAL LOAD RESISTING CAPACITY

11. EASE AND FASTNESS IN CONSTRUCTION

12. FIRE RESISTANT

ADVANTAGES OF C.S.E.B.

• ONLY FOR LOW RISE STRUCTURES: MAXIMUM 2 STOREY• STRENGTH VERY MUCH DEPENDANT ON THE PROPERTIES OF SOIL• TOO MUCH STABILIZATION(CEMENT) WILL MAKE NO ECONOMIC SENSE• INTERLOCKING FEATURES DO NOT PROVIDE AIR TIGHTNESS. MINIMUM GAP IS

FORMED DUE TO WHICH TERMITE/AIR CURRENT CAN PASS.• REQUIRES MINIMUM MORTAR BETWEEN THE BLOCKS TO MAINTAIN

HORIZONTAL CONSTRUCTION LEVEL

• TOO MUCH MORTAR BETWEEN THE BLOCKS JEOPARDIZES THE INTERLOCKING FEATURE

• FOR FRAME STRUCTURES, HI-CSEB CAN BE USED AS FILLER MATERIALS BUT THE STRUCTURAL MEMBERS SIZES INCREASES DUE TO INCREASE IN THE BLOCK WEIGHT

LIMITATIONS OF C.S.E.B.

• SUSTAINABLE /ECONOMICAL/ECO FRIENDLY BUILDING MATERIAL

• EASY AND SIMPLE TECHNOLOGY• CREATES EMPLOYMENT OPPORTUNITIES • REDUCE DEPENDENCY ON IMPORT OF BRICKS• MAKING HOUSING AFFORDABLE

CONCLUSION

THEREFORE, PRODUCTION AND CONSTRUCTION WITH HCSEB IS RELEVANT AND IT IS TO BE ADOPTED WHERE EVER POSSIBLE.

THANK YOU

CONSTRUCTION MATERIALTOPIC:- c.s.e.b(COMPRESSED STABILIZED EARTH

BLOCKS)SUBMITTED BY:VARTIKA MISHRA

SUGANDHA SHARMATARANPREET SINGH

SUNIL YADAVVATSALA MAHAWAR