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HOLLOW BLOCK
BHAVESH PETHANI (13BCL083)
DHRUV PRAJAPATI (13BCL084)
HITESH PRAJAPATI (13BCL085)
ABHISHEK SHARMA (13BCL104)
SUSTAINABLE BUILDING TECHNOLOGY
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History• The first hollow concrete b
1890 by Harmon S. Pa
States. After 10 years of ex
patented the design in 19were 8 in (20.3 cm) by 10
(76.2 cm), and they were s
be lifted into place with a s
an estimated 1,500
manufacturing concrete b
States.
• These early blocks were uand the average output w
per person per hour. To
manufacturing is a highly
that can produce up to 2,00
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A h o llo w m as o n r ydefined as having
cross-sectional area
plane, parallel to the
surface, less thp e r c e n t of the gros
sectional area in th
plane
DEFINITION
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MATERIALS USED
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(1)Proportioning
(2)Mixing (4)Curing
(3)Compacting
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Types of machinery used
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Type of machinery used
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Type of machinery used
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Type of machinery used
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1
2
3
4
5
SIZE
Cavities
1. 100× 200 × 400
2. 200× 200 × 400
The total width of the cavity in a
the face of the block as laid in w
surface will be at right angles to
shall not exceed 65% of the total Shell Thickness
The shell thickness of blocks shall not be less
than 40 mm for sizes A & B and 20 mm for other
sizes. JointsThe end of the blocks, which form
may be plain rectangle and groov
grooved.Aggregates• Passes through IS sieve 1285mm
• 15% should retained on IS sieve 10 mm and 10-
40% on IS sieve 4.75 mm
Quality Specific
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1
2
3
4
5
Density
Crushing Strength
The block density hollow concrete block shall
not be richer than 1600 kgs. Per cubic meter of
gross volume.
The average crushing strength o
immersed in water maintaining a
for a period of 24 hrs bedded with
shall be not less than 50 kg pe
area.
Drying Shrinkage
The drying shrinkage of average of three blocks
when unrestrained shall not exceed 0.004 per
cent. Moisture contentsThe moisture content (average of
blocks on being immersed in w
0.03 %.Water Absorption
The water absorption (av. 3 blocks)
shall not exceed 240 kg per cu meter.
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Method of bui
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Corner bonding
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Estimating Data
Blocks
There are 121 ⁄ 2 blocks in every square meter of wall surface area.
Mortar
1m3 of mortar is required for approximately 800
blocks.
For a 1:1:6 mortar mix, the approximate quantities
required for 1m3 of mortar are:
6 bags cement
6 bags lime
1.2 m3 of damp sand (allowing 20% bulking)
Grout
Approximate quantities for filling concrete blocks
and elements:
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HOLLOW BLOCK
RETAINING WALLS
COLUMNS
COMPOUND WALLS
USES
In view of their vers
properties, hollow concr
demand by depa
engaged in construction
Housing Boards and Urb
Corporations, Road Tran
and Forest Departments.
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Some Creative Uses of HCB
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LIFE CYCLE ANALYSIS Steps4 steps
1. goal and scope
2. Life cycle inventory
3. Life cycle impact analysis
4. Interpretation of the
results.
One square meter of partition wall system is chose
consumption and materials are based on this functio
CO2e/m2 etc.
The values
impacts are 6
/m2 and 0.018
wall values a
CO2 /m2 an
respectively, r
6% of total emb
LCI is a technical, data-based proces
and raw material requirements, a
waterborne emissions, solid waste,
the entire life cycle of a product ,proc
EE: (Embodied Energy)
GWP: (Global Warming Po
AP: (Acidification Potential)
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EMBODIED ENERGY
THE BENEFITS OF HOLLOW
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1
2
3
4
5
Economy in design of sub-structure due to reduction of loadsSaving in mortar for lying of blocks as compared to ordinary brick work. Saving in
Uniform Plaster thickness of 12 mm can be maintained due to precision o
compared to brick work where plaster thickness of average 20 mm is required
even plastered surface due to variations in the sizes of bricks.
Insulation of walls is achieved due to cavity, which provides
all times. Similarly hollowness results in sound insulation
Paint on finished walls can be applied due to cavity, which
saving for all times. Similarly hollowness results in sound insu
No problem of the appearance of salts. Hence, grea
maintenance of final finishes to the walls.
THE BENEFITS OF HOLLOW
CONCRETE BLOCK:-
THE BENEFITS OF HOLLOW
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1
2
3
4
5
Laying of Blocks is much quicker as compared to brickwork
saving in time.
Thermal insulation property of hollow concrete block is more
ordinary brick wall.
Hollow concrete block is environmentally eco friendly.
Factor of safety of hollow concrete block is more than brick m
Maintenance cost of the hollow concrete block is less than br
THE BENEFITS OF HOLLOW
CONCRETE BLOCK:-
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DISADVANTAGE• Rising Damp: When groun
wall from the base and migrat
• Cracking: Often due to shrin
or movement of the wall.
• Efflorescence: Occurs whe
salt are carried to the surface
through the masonry.
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1
2
3
4
5
The dead load of hollow concrete block is much lesser tha
due to this, one can work with the structural engineer anconsumption in construction.
Hollow concrete blocks require minimal mortar.
If these blocks are engineered properly then dimensional a
finishing quality is obtained
Usage of lintel blocks brings tremendous operational efficie
lower cost.
Hollow concrete blocks have additives to improve their wat
seepage minimization
Why to use HCB??
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1
2
3
4
5
Hollow concrete blocks can be engineered to achieve very h
strengths.
Hollow concrete blocks are much more sturdy.
The hollow concrete block adopt to modern design forms
texture etc.
Minimum maintenance cost and cost competitiveness with ot
it a preferred material for today’s building.
Hollow concrete blocks can effectively be used for cold sto
go downs as they are thermally effective.
Why to use HCB??
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C SE STUDY
SPRING FIELD ohio
The house is a 1,300
square foot, single-story
structure. The house has
concrete masonry
exterior walls, a wood-
framed floor deck over a
crawl space, and wood-
framed interior walls and
roof trusses.
BRICK MASONRY AND HOLLOW CONCRETE BLOCK-A COMPARISIO
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BRICK MASONRY AND HOLLOW CONCRETE BLOCK A COMPARISIO
Ahmad et.al
• Materials used
1. Cement:
Khyber ordinary Portland cement of 43 grade confining to IS 8112:1989 wa
the work .
2. Sand:
Sand used throughout the work comprised of plane river sand with maxim
confining to zone II as per IS 383-1970 with specific gravity of 2.6.
3. Hollow Concrete Blocks:
Hollow concrete blocks of size (16x8x8) inch and (8x8x8) inch were used for m
4. Bricks:
Bricks were used of modular size (22.5x10x7.5) cm.
5. Mortar:
1:4 cement sand mortar as used for wall masonry were made in the sta
prescribed by IS: 3535-1986
E C t bi t f b i k t t b R 3875
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Economy: Cost per cubic meter of brick masonry comes out to be Rs.3875
cubic meter of brick masonry comes out to be Rs.3290. The cost of block wall
hollow concrete masonry came out to be 17.78%less than that of brick w
masonry was economical than brick masonry.
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CONCLUSION
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• CONCLUSION
Compressive strength of the brick units and brick masonry wall came out
compressive strength of HCB units and hollow concrete wall masonry.
Sound insulation property of hollow concrete masonry was more than that of
Thermal insulation property of hollow concrete masonry was more than that
due to presence of air in hollow concrete units.
As the cost of block walls per meter cube of masonry comes out to be lesser
walls. Block masonry is economical than brick masonry.Maintenance cost of HCB masonry is less than brick masonry because
found as it is found in brick masonry wall.
•
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Conclusion of Presentation
1. Being light in weight HCBs provide economy in design of sub-structurof the loads.
2. Laying of blocks saves mortar as compared with ordinary brick work.
mortar plaster work too.
3. Cavity of blocks helps achieving insulation of walls and provides ener
times. Hollowness results in sound insulation.
4. There is no problem of appearance of salts thereby saving in maintenfinishes to the walls.
5. Laying of blocks is much quicker as compared to brick work hence, s
6. HCBs are environmentally eco-friendly.
7. Factor of safety HCB masonry is more than brick masonry.
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REFERENCEwww.ecologicbuilding.com
www.rockyhollowblocks.com
www.ustudy.inwww.researchpublish.com
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Thank YOU..