New Building Material Burman Roy

8/7/2019 New Building Material Burman Roy

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Green Walling MaterialSubmitted by :

Group II

Aditi Varma Prakash raja Eshu bansal Pankhuri khetawat Gyanesh Prakash


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Green Material

Green material refers to a process that isenvironmentally responsible and resource-

efficient throughout a building's life-cycle:from sitting to design, construction,operation, maintenance, renovation, anddemolition.


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1.Fly ash bricks.

2.Hollo

w co

ncrete bl

ocks

3.Cellular light weight concrete

4.Compressed earth blocks

5.Autoclaved aerated concrete blocks

Green Walling materials


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FLY ASH BRICKS

This material is eco friendly, reduces solid

waste and dust in the nature. It ismanufactured from Fly ash, Gypsum, alum and

stone crushing dust.

Appearance It has open cells (of varying size) textured

surface. Fly ash bricks have naturally occurring

reddish brown color similar to conventional

bricks.


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FLY ASH BRICKS

They are used as external & internal wall envelope.

These are 2 hrs fire rated, termites, and fungal decayresisted

Better insulating properties, also has better crushing

strength as compared to brick.

If cladding is done, requires less maintenance.


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Physical Appearance

Fly Ash Bricks are available in size

230x110x75 & 190x90x90 mm.

Density: 600 -1200 kg/cum.

Compressive strength: 3.5-30 N/sqmm with

class designation ranging from 3.5-30.


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Installation

Fly ash bricks are laid with a mortar layer, one course above the other.

The material is easy to finish, too. Exterior walls can be painted,

plastered, or finished with claddings. Interior surfaces can be

plastered, sheet rocked, tiled, painted, or simply left exposed.

Quality/durability

These are 2 hrs fire rated, termites, and fungal decay resisted. A zero

loss in mass is recorded after 15 cycles of soaking & drying conditions

of sodium sulphate solution, better then clay bricks which has certain

loss in mass.


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Initial cost - Rs 2500/cumEnergy efficiency :Embodied energy:- 2.5 MJ/Kg.Thermal insulation: 0.15-0.31 W/m.k

Sound insulation: 30 dB

Energy performance :Better insulating properties, also has better crushing strengthas compared to brick.

Maintenance :Unfinished exterior walls should be covered with an exteriorcladding or parged with mortar because when exposed tophysical damage, dirt, and water, atmospheric debris cancollect in the open cells.


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LimitationsUnfinished exterior walls are exposed to physical damage, dirt,and water, because atmospheric debris can collect in the open

cells.

Life span50 yrs

Appraisal - Market acceptabilityIt is better in all respects than brick but it is not used as much asbrick is used due to lack of awareness of the material.

ManufacturersDrona bricks (East of Kailash, N. Delhi), Puzzolana Greenbricks (Janakpuri, N.Delhi), Smart Associates (Woraiyur, N.Delhi)


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Hollow concrete block

The hollow blocks are made of cement, stone chips, stone

dust and sand. These blocks have more tensile strength, thewalls constructed from these blocks act as thermal

insulators because of their hollowness.

Used as exterior envelope.

It is resistant to fire (5 hrs rated), termites, and fungal decay.

Life span of 50 yrs.


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Properties

Compared with conventional brick, it will have lower energy

costs Because of better insulation.

Made of locally available material.

It is non-toxic.

Has good insulating property as compared to conventional.

Requires less maintenance.

Can be used as load bearing structural element up to 3 storey's.


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Appearance

It has generally gray color with rough texture.

The blocks are made in the sizes of 12x8x4 ; 12x8x3";

12x8x6", etc.

Density: 1500 kg/cum

Compressive strength: 3.5-7 N/sqmm


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Installation

Hollow concrete blocks are installed with a thin-set mortar. To

add strength, block or panels are cored and filled with grout and

reinforcement bar at stated intervals.

The material is easy to finish, too. Exterior walls can be painted,

plastered, or finished with claddings. Interior surfaces can be

plastered, sheet rocked, tiled, painted, or simply left exposed.

Quality/durability

It is resistant to fire (5 hrs rated), te

rmites, and fungal decay.


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Initial cost

Initial cost Rs 3000-3200/cum

Operational cost

Compared with conventional brick, it will have lower

energy costs Because of better insulation.

Resource efficiencyMade of locally available material.


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Energy efficiency

Has good insulating property as compared to conventional.

Embodied Energy: - 10.8 MJ/kg.

Thermal insulation: U-value-1.59

Sound insulation: Can do sound insulation upto 45dB.

Energy performance

High embodied energy but less operational cost.


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Appraisal - Market acceptabilitySlightly costlier than conventional bricks, provides good insulation

(thermal as well as sound) but still less used in buildings.

ManufacturersNilite concrete systems (Rao Harnath Marg, Kapashera, New

Delhi)


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Cellular light weight concrete

CLC is a lightweight concreteproduced by initially making

a slurry ofC

ement +Sand +FlyAsh (constituting 26% - 34% content) + water, which isfurther mixed with the

addition of pre-formed stablefoam in an ordinary concretemixer under ambient

conditions.


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CLC, like conventional concrete ages well, increasing its

strength by as much as 50% between 28 and 90 days after

pouring.

It doesnt affect the environment. No toxic gas emissions.

Due to its high sound insulating properties it is used as a

sound barrier between suspended structural floors, whereits light weight and strength is an added advantage.

Recyclable

Requires less maintenance


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The size for CLC blocks -500x250x200/100 mm.

This Cellular Lightweight Concrete (CLC) can be produced in

a wide range of densities from 400 kg/m3 to1,800 kg/m3 to suit

different applications.

Compressive strength: 2-6 N/sqmm

Physical properties (Dimensions & Weight)


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InstallationThey are installed with mortar layer between different courses.

Quality/durability

CLC

, like conventional concrete ages well, increasing its strengthby as much as 50% between 28 and 90 days after pouring, As long

as CLC draws humidity from the atmosphere it will keep on

increasing its mechanical properties.Initial cost

Rs. 2800-3000/cum


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Resource efficiency

In view the use of fly ash 33% (an environment polluting

industrial waste) being a major ingredient of CLC, CLC and this

being a good substitute of ordinary clay bricks

Benefits

Tremendous weight reduction

High thermal insulation

Optimum fire rating

Substantial material savings:

no gravel used little cement

less steel in structure and foundation

Easy and fast production


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L

ife spanCellular Light Weight concrete has a life-time span (minimum

100 years). It is expected that the strength would continue to

increase with continuing hydration.

Appraisal - Market acceptability

Promoted by BMTPC, used in low cost light weight structures.

Manufacturers in India

Hindustan Prefab Limited (Jangpura New Delhi), Aerocellcrete

India( Mayur Vihar Phase - II, Delhi), BERG India PVT. LTD

(Haus Khas, New Delhi).


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Autoclaved aerated concrete

it is an economical, sustainable, solid block that provides

thermal and acoustic insulation as well as fire and termite

resistance.

AAC is available in a variety of forms, ranging from wall

and roof panels to blocks and lintels. It is a non-organic,

non-toxic, airtight material that can be used for wall, floor,

and roof panels, blocks, and lintels


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Autoclaved aerated concrete:-

It is very light colored & grayish. It contains many small

voids that can be clearly seen when looked at closely. The

closed air pockets contribute to the materials insulating

properties and also its aerated nature. Although there is no

direct path for water to pass through the material, an

appropriate coating is required to prevent water penetratinginto the AAC material.


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Autoclaved aerated concrete:-

Blocks come 24, 32, and 48 inches long, between four to

16 inches thick, and eight inches high.

Density: 300kg/cum 1000 kg/cum

Compressive strength: 2-6 N/sqmm.

AAC is recyclable, made of locally available & recycled

material

There are no toxic substances and no odour in the final

product.


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Autoclaved aerated concrete

AAC is a green building material. It has little manufacturing

impact, is recyclable, does not off gas and provides termite,

water, fire, thermal and sound resistance.

Life span of 50 yrs.

Load-bearing structures up to three storeys high


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Compressed Earth Blocks

A local material

Ideally, the production is made on the site itself or in the nearby area. Thus,

it will save the transportation, fuel, time and money.

An adapted material

Being produced locally it is easily adapted to the various needs: technical,

social, cultural habits.

A transferable technology

It is a simple technology requiring semi skills, easy to get. Simple villagers

will be able to learn how to do it in few weeks. Efficient training centre will

transfer the technology in a week time.


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Reducing imports Produced locally by semi skilled people, no need import

from far away expensive materials or transport over long distances heavy and

costly building materials.

Fire resistant - non-combustible with excellent fire resistance properties.

Beneficial climatic performance in most regions due to its high thermal

capacity, low thermal conductivity and porosity, thus, it can moderate

extreme outdoor temperatures and maintain a satisfactory internal

temperature balance


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Density

- Dry: minimum: 1,700 kg/m

or 6.319 kg/block;

recommended: 2,000 kg/m or

7.434 kg/block.

- Freshly moulded: minimum:

1,870 kg/m or 6.950 kg/block;

recommended: 2,200 kg/m or

8.177 kg/block.

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New Building Material Burman Roy