Use of Autoclaved Aerated Concrete Block by Rajdeep Chowdhury

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Presentation Transcript

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) Compressive Strength Thermal Conductivity ( K Value)   Resistant to Fire   Drying Shrinkage   Design Gross Density 551-650 Kg/Cum Minimum 30 Kg/cm2   0.162 W/mK (Average)   2 - 6 hrs depending upon Thk. 0.1 %   850 Kg/Cum.( appx.)

OVERVIEW OF MANUFACTURING PROCESS & PLANT : 

OVERVIEW OF MANUFACTURING PROCESS & PLANT

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Composition by weight : Fly Ash 55-60% Gypsum 2-3% Cement 10-12% Lime 12-14% Aluminum Powder 0.03% Balance Slurry solids generated during process RAW MATERIALS IN AAC

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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 Thermal Insulation Fire Resistance 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

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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:

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QUESTIONS ?

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THANK YOU