- Building Materials and Construction Technology - Aerated Autoclave Concrete Topics: 1) Introduction 2) History 3) Manufacturing 4) Sizes 5) Advantages 6) Disadvantages 7) Case Study

1. AERATED CONCRETE
BUILDING MATERIALS AND
CONSTRUCTION TECHNOLOGY-V
SUBMITTED BY:
1) ANUBHAARORA (A1904014006)
2) TANIHA SACHDEVA (A1904014009)
3) NIMISHA BHAGAT (A1904014015)
4) MOLLIEE SETH (A1904014030)
5) SUNYANA MIGLANI (A1904014033)
6) SANYAM CHANANA (A1904014042)
Vth SEMESTER , SECTION-A
B.ARCH , DEPT. : A.S.A.P

2. INTRODUCTION
• ALSO KNOWN AS AUTOCLAVED AERATED CONCRETE (AAC)
• AUTOCLAVE
o PRESSURE CHAMBER
o UNDER HIGH TEMPERATURE AND PRESSURE DIFERENCE
o USED TO CARRY OUT INDUSTRIAL PROCESSES
• FOAM BASED CONCRETE BUILDING MATERIAL.
• BUILDING SYSTEM OF BLOCKS AND PANELS USED IN THE
CONSTRUCTION OF WALLS, FLOORS AND ROOFS.
• USED IN EITHER A LOAD-BEARING CAPACITY OR AS A NON-
LOAD BEARING COMPONENT .
AUTOCLAVE MACHINE
A.A.C BLOCK FOAM CONRETE CONSTRUCTION USING A.A.C BLOCKS

3. • PERFECTED IN THE MID-1920S
• BY THE SWEDISH ARCHITECT AND INVENTOR: DR. JOHAN AXEL ERIKSSON
• ERIKSSON DISCOVERED THAT THIS MOIST FOAMED MASS CAN EASILY HANDLE PRESSURIZED
STEAM CURING PROCESS.
• PRODUCTION STARTED IN 1929 IN SWEDEN
• DEVELOPED : DEPLETING TIMBER SUPPLIES
HISTORY
DR. JOHAN AXEL ERIKSSONAUTOCLAVES FOR FASTER HARDEING OF CONCRETE

4. • RAW MATERIALS:
1. SAND (MAXIMUM QUANTIY)
2. CEMENT
3. LIME
4. GYPSUM
5. WATER
6. EXPANSION AGENT.
• THE FINISHED PRODUCT :
1. FIVE TIMES THE VOLUME OF THE RAW
MATERIALS USED
2. WITH AN AIR CONTENT, BETWEEN 70%
TO 80% (DEPENDING ON THE REQUIRED
STRENGTH AND DENSITY.)
MANUFACTURING:
SAND LIME
CEMENTGYPSUM

5. MANUFACTURING PROCESS

6. SIZES
• PANELS EXTEND FROM FLOOR TO TOP OF THE
WALL:
o HEIGHT: UP TO 6 METERS
o WIDTH: 0.6 METERS
o THICKNESS: 0.15, 0.20, 0.25, OR 0.30 METERS
• BLOCKS ARE LARGER AND LIGHTER THAN
TRADITIONAL CONCRETE MASONRY:
o HEIGHT 0.20 METERS TYPICAL
o WIDTH: 0.60 METERSLONG
o THICKNESS: 0.1, 0.15, 0.20, 0.25, 0.30 METERS
• THICKNESS AVAILABLE :
1) 100 MM
2) 150 MM
3) 200 MM
4) 250 MM
A.A.C BLOCKS A.A.C ‘U’BLOCKS
A.A.C LINTELS A.A.C PANELS
TYPES OF A.A.C AVAILABLE

7. ADVANTAGES
• APPEARANCE AND VOLUME - FIVE TIMES THE VOLUME OF
THE RAW MATERIALS USED.
• INSULATION AND STRUCTURAL .
• LIGHT WEIGHT.
• DURABILITYAND DIMENSIONAL STABILITY
• HIGH SOUND REDUCTION
• GOOD INSULATION QUALITIES.
• THE HIGHER THE VALUE OF R, THE BETTER THE THERMAL
PERFORMANCE AND HEAT RETENTION OF THE MATERIAL OR
ASSEMBLY, AND THE SLOWER ANY HEAT LOSS.
• THE THERMAL PERFORMANCE THE TEMPERATURE
MODERATING THERMAL MASS IS MOST USEFUL IN
CLIMATES WITH HIGH COOLING NEEDS.
• FIRE RESISTANCE ,NONCOMBUSTIBLE, NOT BURN OR
GIVE OFF TOXIC FUMES.
• ENVIRONMENTALLY FRIENDLY ,SUSTAINABLE.
VOLUME AND APPEARANCE
FIRE RESISTANCE AND NON-COMBUSTIBILITY
THERMAL PERFORMANCE

8. DISADVANTAGES
• PRODUCTION COST IS HIGH
• MANUFACTURER IS LIMITED.
• LOW STRENGTH IN COMPARISON TO
CONVETIONAL MATEROIAL.
• LOW COMPRESSIVE STRENGTH
• AAC BLOCKS SHOULD NOT BE USED
BELOW GROUND LEVEL
• CONSISTENCY IN QUALITY AND
COLOUR DIFFICULT TO MAINTAIN.
• BRITTLE NATURE
A HOUSE IN ARGENTINA MADE OF AERATED CONCRETE
AERATED CONCRETE BLOCKS

9. PROJECTS IN INDIA THAT ADOPTED A.C.C CONSTRUCTION
1) MEDICITY – GURGAON
2) MAX HOSPITAL – SAKET
3) MAX HOSPITAL – PATPARGANJ
4) FORTIS-NOIDA
5) APOLLA GLENEAGLES – KOLKATA
6) COLUMBIAASIA - PUNE
7) LODHA HOSPITAL – MUMBAI
8) TAPTI VALLEY INTERNATIONAL SCHOOL –SURAT
9) RAHUL RAJ MALL – SURAT
10) LOTUS BOULEVARD- NOIDA
11) WOCKHARDT HOSPITAL- MUMBAI
APOLLO -KOLKATA
COLUMBIA ASIA BUILDING- PUNE
FORTIS - NOIDA
MEDICITY GURGAON
MAX HOSPITAL - SAKET

10. CASE STUDY
• LARGE RESIDENCE (6,800 SQUARE FEET) IN A SOUTHERN
MARYLAND FOREST.
• USED 12-INCH AAC BLOCKS.
• REASONS FOR ADOPTING AAC :
1) PROVIDED THERMAL INSULATING AND NONCOMBUSTIBLE
PROPERTIES TO STAND UP TO THE HOME’S FOREST SETTING
2) THE SIMPLICITY OF AAC ALLOWED
o TO CONSTRUCT A STRUCTURAL WALL THAT IS INSULATED
o RESISTANT TO TERMITES
o READY FOR FINISHING.
1)HANDAL HOME, MARYLAND, U.S.A
HANDAL HOME - MARYLAND
A.C.C CONSTRUCTION

11. 2) RAHUL RAJ MALL-SURAT
• USED OF AAC BLOCKS : FINEST EXAMPLES OF COST-
EFFECTIVE AND ENVIRONMENT-FRIENDLY
CONSTRUCTION.
• BY EMPLOYING AAC BLOCKS, HARSH CONSTRUCTIONS,
THE CONSTRUCTION COMPANY, WAS ABLE TO REDUCE
THE RCC COST BY 8-10%.
• SIMILARLY, MORTAR AND PLASTER COST WAS
LOWERED UP TO 15%, AND THE CONSTRUCTION TIME
WAS HALVED.
• OTHER BENEFITS TO THE PROJECT:
o FLEXIBILITY TO CHOOSE FROM A WIDE RANGE OF AAC
BLOCKS SIZES,
o FAST COMPLETION OF WORK
o MINIMAL WASTAGE WITH LARGER BLOCKS
RAHUL RAJ MALL- SURAT
CONSTRUCTION USING A.A.C BLOCKS

12. CONCLUSION
• AUTOCLAVED AERATED CONCRETE
- ECONOMICAL PRODUCT FOR CONSTRUCTION
- USED PARTICULARLY WHERE BUILDINGS ARE DESIGNED
IN MODULES TO ACCOMAODATE THE DIEMSIONS OF THE
PRODUCT
- ON-SITE CUTTING AND WASTAGE REDUCES
- ADDS TO THE SPEED AND SIMPLICITY OF CONSTRUCTION
• NUMBER OF COMPONENTS AND CONSTRUCTION STEPS :
REDUCED
• EXTREME EFFICIENT THERMAL PROTECTION PROPERTIES
: REDUCE ENERGY CONSUMPTION AND COSTS.
• 100 % GREEN AND L.E.E.D CERTIFIED BUILDING MATERIAL
BLOCKS COMING OUT OF AUTOCLAVE MACHINES
A.C.C BLOCKS