: Autoclaved Aerated Concrete Introducing a Building System Slide 2: Avantha Group is one of India’s leading business conglomerates. Its successful entities includes :
BILT – Paper & Pulp
Crompton Greaves –Power Equipment
The Global Green Company- Food processing
Avantha Power & Infrastructure – Power generation
Solaris ChemTech - Chemical
Avantha Technologies – IT & ITES. WHAT IS AUTOCLAVED AERATED CONCRETE : WHAT IS AUTOCLAVED AERATED CONCRETE Autoclaved Aerated Concrete (AAC) is formed by a chemical reaction between finely divided calcareous and siliceous material.
AAC has been around for over 80 years. The first documented attempt at autoclaving aerated concrete was in 1923 in Sweden by an architectural science lecturer, Dr Johan Axel Eriksson. Since then, AAC has been used extensively in Europe, Asia & USA.
More AAC is produced worldwide than any other building material with the exception of regular concrete. Microscopic view of the crystalline composition of AAC at the cellular level. Microscopic view of the crystalline composition of AAC at the cellular level. AUTOCLAVED AERATED CONCRETE IN INDIA : Hindustan Prefab Limited (HPL), the Government owned company is known to be the first Organisation in India to produce AAC and subsequently HPL has stopped the AAC operation in 1972 . In past few years BBEL along with two more companies Siporex India Ltd. & HIL was catering to the material requirements of Northern, Western and Southern Market respectively. Until recently looking at the demand of alternate walling materials, 6-7 companies has also started manufacturing AAC mostly in western part of India. AUTOCLAVED AERATED CONCRETE IN INDIA ENVIRONMENTAL ATTRIBUTES : ENVIRONMENTAL ATTRIBUTES Recognized “Green Building” product
• Aids in IGBC –LEED , TERI – GRIHA Design
• Mold resistant -inorganic and breathable
• No toxic releases or off-gassing
• Promotes healthy Indoor Air Quality
• Resource efficient BBEL- Aerated Autoclaved Concrete Plants : BBEL- Aerated Autoclaved Concrete Plants Plant-1 Plant-2 PRODUCT RANGE : PRODUCT RANGE Slide 8: BILTEC AAC BLOCK BILTEC REINFORCED WALL PANEL BILTEC REINFORCED FLOOR PANEL Slide 9: BILTEC AAC BLOCK DIMENSIONS OF AAC BLOCKS : DIMENSIONS OF AAC BLOCKS Slide 11: BIS 2185(Part-III) : Specification of material
BIS 6041 : Construction of AAC masonry
BIS 6441 (Part I-IX): Testing Procedure.
BIS 6072,6073 : Autoclaved Reinforced panels B.I.S.CODES APPLICABLE TO AAC PROPERTIES OF AAC BLOCK : PROPERTIES OF AAC BLOCK Density (Oven Dry)
Thermal Conductivity ( K Value)
Resistant to Fire
Design Gross Density 551-650 Kg/Cum
Minimum 30 Kg/cm2
0.162 W/mK (Average)
2 - 6 hrs depending upon Thk.
850 Kg/Cum.( appx.) OVERVIEW OF MANUFACTURING PROCESS & PLANT : OVERVIEW OF MANUFACTURING PROCESS & PLANT Slide 14: Composition by weight :
Fly Ash 55-60%
Aluminum Powder 0.03%
Balance Slurry solids generated during process RAW MATERIALS IN AAC Slide 15: MANUFACTURING PROCESS ENERGY CONSUMPTION BY AAC : ENERGY CONSUMPTION BY AAC STACKING OF AAC BLOCK : STACKING OF AAC BLOCK UNIQUE FEATURES OF AAC : UNIQUE FEATURES OF AAC Lighter Weight
Earthquake Resistance LIGHTER WEIGHT(Comparison with Clay Brickwork) : LIGHTER WEIGHT(Comparison with Clay Brickwork) Brick Masonry of 230 mm:
Wall thickness = 230 mm
Density of brick masonry = 2000 kg/m3
load/sqm. = 0.230x2000 = 460 kg. /m2
Plaster = 2x0.01x2000 = 40 kg. /m2
Total = 500 kg. /m2
Brick Masonry of 115 mm :
Wall thickness = 115 mm
load/sqm. = 0.115x2000 = 230 kg. /m2
Plaster = 2x0.01x2000 = 40 kg. /m2
Total =270 kg. /m2 Slide 20: AAC Block Masonry of 200 mm
Wall thickness = 200 mm.
Density of AAC blocks = 700 kg/ m3
load/sqm. = 0.2x700 = 140 kg. /m2
Plaster = 2x.01x200 = 40 kg. /m2
Total = 180 kg. /m2
AAC Blocks of 100 mm :
Wall thickness = 100 mm
load/sqm. = 0.1x700 = 70 kg. /m2
Plaster = 2x0.01x200 = 40 kg. /m2
Total = 110 kg. /m2 The advantage of low weight : The advantage of low weight DENSITY OF AAC vis-à-vis OTHER MATERIAL : DENSITY OF AAC vis-à-vis OTHER MATERIAL Thermal Insulation : Thermal Insulation Energy savings in the operation of buildings are of particular importance as the cost of energy for heating and air conditioning in most cases represent the major cost factor in the operating cost of a building.
The entrained air in the cellular structure of BILTEC AAC system gives the product excellent thermal insulation properties, as well as good heat retention characteristics. These characteristics contribute significantly to the energy saving performance of the building . Fire resistance : Fire resistance AAC is non-combustible. It has one of the highest hourly fire resistance ratings per millimetre of any building material. This makes it an ideal choice for fire protection around steel columns and steel beams, and in the construction of shaft walls, stairwells, corridors and firewalls. A 100mm and a 200 mm non-load bearing wall shall have fir resistance of 2 hours and 6 hours respectively . Earthquake resistance : Earthquake resistance AAC has been used for many years in areas subject to seismic action. Building which consist fully or partly of AAC have in general terms shown good resistance to earthquake forces in practice. The light weight of AAC reduces the seismic forces in common with some other materials. The non combustible and fire resistance nature of the AAC material is an advantage against fires commonly associated with earthquakes.
The low weight of AAC in relation to its strength is an intrinsic advantage for earthquake design. AAC permits the designer to reduce the mass of the structure, limiting the impact of accelerations introduced in seismic situation. AAC IS 100% RECYCLABLE : AAC IS 100% RECYCLABLE The waste factor in its construction can be reduced to less than 1% with good construction management.
Nearly every piece of the material can be used in the construction of an AAC building.
All waste, however, is easily recycled. Is BILTEC –AAC is Green building material? : Is BILTEC –AAC is Green building material? Yes, Up to 65 % raw materials consist of Industrial Waste i.e. Fly ash
Yes ,Non-polluting Manufacturing process -only steam is released
Yes, Resource Efficient –
4 parts of AAC are manufactured from 1 part of raw material
Yes ,Low Energy Consumption throughout Life cycle- The total energy consumption to produce AAC is less than 1/2 that of comparable building materials. Also When installed, AAC results in tremendous energy savings for heating and cooling the building.
Yes ,Healthier Indoor Air Quality –AAC does not off gas. AAC does not promote the growth of mildew and mold, and cannot be infested by termites. Slide 28: RATIONALE OF USING AAC WORKABILTY IN AAC BLOCK : WORKABILTY IN AAC BLOCK BILTEC-AAC Blocks stacked at site : BILTEC-AAC Blocks stacked at site TOOLS & CUTTERS FOR AAC BLOCK MASONRY : TOOLS & CUTTERS FOR AAC BLOCK MASONRY AAC BLOCK CUTTING : AAC BLOCK CUTTING DRILLING & CHASING ON AAC BLOCKS : DRILLING & CHASING ON AAC BLOCKS NAILABILITY IN AAC BLOCK : NAILABILITY IN AAC BLOCK DOOR FRAME FIXING : DOOR FRAME FIXING CONDUITING IN AAC MASONRY : CONDUITING IN AAC MASONRY LAYING OF AAC BLOCK MASONRY : LAYING OF AAC BLOCK MASONRY Slide 38: AAC BLOCKS WHILE LAYING AAC Blocks in use : AAC Blocks in use Finishing in masonry : Finishing in masonry Some Corporate Associated with BILTEC : Some Corporate Associated with BILTEC Some projects with BILTEC-AAC blocks : Some projects with BILTEC-AAC blocks Commonwelath village project ITC Green Centre,Gurgaon Prefab Housing Project in Gurgaon Ansal Plaza , Andrews Ganj ,Delhi Slide 43: MAX - Saket Medicity -Gurgaon Fortis – Noida, Mohali Columbia Asia –Gurgaon Apollo Gleneagles –Kolkata MAX Patparganj Slide 44: Chalet Hotel Leela Hotel Park Hotel ITC Hotel Orchid Hotel Vatika Westin Hotel Slide 45: BILTECH BUILDING ELEMENTS LIMITED
H.O.: 124, Janpath ,Thapar House , New Delhi-110001
Phone : 011-41699283, 41699212; Mobile : 9811076657 FOR ENQUIRIES PLEASE CONTACT: Slide 46: QUESTIONS ? Slide 47: THANK YOU