The document discusses modern building materials and requirements for insulating materials. It notes that decisions on building and renovation should consider strength, resistance to dampness, fire, heat insulation, sound insulation, durability, and health impacts. Insulating materials are chosen based on their thermal and other properties like mechanical strength, noise reduction, and cost effectiveness.
The key components of typical clay bricks are also summarized. Clay soils are excavated, cleaned, weathered, and blended before being shaped, dried, and fired through clamp burning or kiln burning methods. Proper firing results in strong, durable bricks suitable for construction needs.
properties,Manufacturing, types and features of bricksZeeshan Afzal
Bricks
Definition of bricks
properties of bricks
types of bricks
features of bricks
How bricks are made
Preparation of brick earth
Moulding of bricks
Drying of bricks
Burning of bricks
PREPARATION OF BRICK EARTH
Removal of loose soil:
About 30 cm depth contains a lot of impurities
like organic matter and hence
it should be taken out and thrown away.
Digging, spreading and cleaning:
The earth is then dug out from the ground.
This earth is spread into heaps
about 50 to 150 cm height.
Weathering:
The earth is then exposed to atmosphere for softening.
The period may be Of
few weeks to a season.
Hand moulding
When moulding is done with hand it is called hand moulding.
A wooden rectangular mould made in the shape of a brick is normally used for this purpose.
Machine moulding
The clay is placed in the machine, it comes out through the opening Under pressure.
It is cut to bricks by steel wires fixed into frames.
These bricks are also called wire cut bricks.
DRYING OF BRICKS
contain 7 to 30 percent moisture, depending upon the
forming method.
most of this water is evaporated in dryer chambers
temperatures about 100 ºF to 400 ºF (38 ºC to 204 ºC).
time, is between 24 to 48 hours.
Heat and humidity must be carefully regulated to avoid cracking in the brick.
BURNING OF BRICKS
INTERMITTENT KILN
Highly inefficient & labor-intensive.
Use coal + scavenged fuels
Most common, most primitive, most polluting
Temporary Structures
High Alumina BricksHigh alumina bricks from 50% up to 90% alumina
Various selected superior grade aggregates to meet the various service conditions of various types of furnaces like laddie, blast furnace, cement and sponge iron rotary kiln.
Concrete Bricks
These bricks have either pale green or gray color.
these are prepared from a small, dry aggregate concrete which is formed in steel molds by using vibration and compaction.
Fire Brick
A Fire brick is a block of ceramic material
used in masonry construction and sized to be layer with one hand using mortar.
bricks may be made from type of material .
these are built primarily to withstand high heat and also find applications in extreme mechanical, chemical, or thermal stresses.
the brick is widely used as refractory insulating bricks for maintaining insistent temperature.
Light Weight Hollow Blocks
This blocks are used in construction of houses in earthquake prone areas.
These bricks are made of fly ash, cement, lime, gypsum, stone dust etc.
available in different sizes.
hollow concrete blocks is used as substitute for conventional bricks or stones used in construction of buildings. and the blocks' importmant feature
A small hard block of backed clay that is used to build structure
such as houses and sometimes to make streets ,paths ,etc
Another definition
Molded rectangular block of clay backed by sun or in a kiln until hard and use as a buildings and paving material.
Manufacturing of bricks for masonry construction method and processNaresh Kumar
The process of manufacturing of bricks from clay involves preparation of clay, molding and then drying and burning of bricks. The bricks are building materials which are generally available as rectangular blocks. The bricks do not require any dressing and brick laying is very simple compared to stone masonry.
Agrawal Construction Company was established by Er. Sanjeev Agrawal and now the company is the Best Construction Company in Bhopal. 3 BHK Apartment in Bhopal and spacious 4 BHK Apartment in Bhopal. It is consistently providing luxurious Duplex in Bhopal, flats in Bhopal , home in Bhopal,lavish villa in Bhopal and commercial property for sale in the various prime location of Bhopalsuch as Ayodhya Bypass Road, Hoshangabad Road, Kolar Road, Katara Hills and Airport Road Bhopal with good options of property for sale in Bhopal
NO1 Uk best vashikaran specialist in delhi vashikaran baba near me online vas...Amil Baba Dawood bangali
Contact with Dawood Bhai Just call on +92322-6382012 and we'll help you. We'll solve all your problems within 12 to 24 hours and with 101% guarantee and with astrology systematic. If you want to take any personal or professional advice then also you can call us on +92322-6382012 , ONLINE LOVE PROBLEM & Other all types of Daily Life Problem's.Then CALL or WHATSAPP us on +92322-6382012 and Get all these problems solutions here by Amil Baba DAWOOD BANGALI
#vashikaranspecialist #astrologer #palmistry #amliyaat #taweez #manpasandshadi #horoscope #spiritual #lovelife #lovespell #marriagespell#aamilbabainpakistan #amilbabainkarachi #powerfullblackmagicspell #kalajadumantarspecialist #realamilbaba #AmilbabainPakistan #astrologerincanada #astrologerindubai #lovespellsmaster #kalajaduspecialist #lovespellsthatwork #aamilbabainlahore#blackmagicformarriage #aamilbaba #kalajadu #kalailam #taweez #wazifaexpert #jadumantar #vashikaranspecialist #astrologer #palmistry #amliyaat #taweez #manpasandshadi #horoscope #spiritual #lovelife #lovespell #marriagespell#aamilbabainpakistan #amilbabainkarachi #powerfullblackmagicspell #kalajadumantarspecialist #realamilbaba #AmilbabainPakistan #astrologerincanada #astrologerindubai #lovespellsmaster #kalajaduspecialist #lovespellsthatwork #aamilbabainlahore #blackmagicforlove #blackmagicformarriage #aamilbaba #kalajadu #kalailam #taweez #wazifaexpert #jadumantar #vashikaranspecialist #astrologer #palmistry #amliyaat #taweez #manpasandshadi #horoscope #spiritual #lovelife #lovespell #marriagespell#aamilbabainpakistan #amilbabainkarachi #powerfullblackmagicspell #kalajadumantarspecialist #realamilbaba #AmilbabainPakistan #astrologerincanada #astrologerindubai #lovespellsmaster #kalajaduspecialist #lovespellsthatwork #aamilbabainlahore #Amilbabainuk #amilbabainspain #amilbabaindubai #Amilbabainnorway #amilbabainkrachi #amilbabainlahore #amilbabaingujranwalan #amilbabainislamabad
properties,Manufacturing, types and features of bricksZeeshan Afzal
Bricks
Definition of bricks
properties of bricks
types of bricks
features of bricks
How bricks are made
Preparation of brick earth
Moulding of bricks
Drying of bricks
Burning of bricks
PREPARATION OF BRICK EARTH
Removal of loose soil:
About 30 cm depth contains a lot of impurities
like organic matter and hence
it should be taken out and thrown away.
Digging, spreading and cleaning:
The earth is then dug out from the ground.
This earth is spread into heaps
about 50 to 150 cm height.
Weathering:
The earth is then exposed to atmosphere for softening.
The period may be Of
few weeks to a season.
Hand moulding
When moulding is done with hand it is called hand moulding.
A wooden rectangular mould made in the shape of a brick is normally used for this purpose.
Machine moulding
The clay is placed in the machine, it comes out through the opening Under pressure.
It is cut to bricks by steel wires fixed into frames.
These bricks are also called wire cut bricks.
DRYING OF BRICKS
contain 7 to 30 percent moisture, depending upon the
forming method.
most of this water is evaporated in dryer chambers
temperatures about 100 ºF to 400 ºF (38 ºC to 204 ºC).
time, is between 24 to 48 hours.
Heat and humidity must be carefully regulated to avoid cracking in the brick.
BURNING OF BRICKS
INTERMITTENT KILN
Highly inefficient & labor-intensive.
Use coal + scavenged fuels
Most common, most primitive, most polluting
Temporary Structures
High Alumina BricksHigh alumina bricks from 50% up to 90% alumina
Various selected superior grade aggregates to meet the various service conditions of various types of furnaces like laddie, blast furnace, cement and sponge iron rotary kiln.
Concrete Bricks
These bricks have either pale green or gray color.
these are prepared from a small, dry aggregate concrete which is formed in steel molds by using vibration and compaction.
Fire Brick
A Fire brick is a block of ceramic material
used in masonry construction and sized to be layer with one hand using mortar.
bricks may be made from type of material .
these are built primarily to withstand high heat and also find applications in extreme mechanical, chemical, or thermal stresses.
the brick is widely used as refractory insulating bricks for maintaining insistent temperature.
Light Weight Hollow Blocks
This blocks are used in construction of houses in earthquake prone areas.
These bricks are made of fly ash, cement, lime, gypsum, stone dust etc.
available in different sizes.
hollow concrete blocks is used as substitute for conventional bricks or stones used in construction of buildings. and the blocks' importmant feature
A small hard block of backed clay that is used to build structure
such as houses and sometimes to make streets ,paths ,etc
Another definition
Molded rectangular block of clay backed by sun or in a kiln until hard and use as a buildings and paving material.
Manufacturing of bricks for masonry construction method and processNaresh Kumar
The process of manufacturing of bricks from clay involves preparation of clay, molding and then drying and burning of bricks. The bricks are building materials which are generally available as rectangular blocks. The bricks do not require any dressing and brick laying is very simple compared to stone masonry.
Agrawal Construction Company was established by Er. Sanjeev Agrawal and now the company is the Best Construction Company in Bhopal. 3 BHK Apartment in Bhopal and spacious 4 BHK Apartment in Bhopal. It is consistently providing luxurious Duplex in Bhopal, flats in Bhopal , home in Bhopal,lavish villa in Bhopal and commercial property for sale in the various prime location of Bhopalsuch as Ayodhya Bypass Road, Hoshangabad Road, Kolar Road, Katara Hills and Airport Road Bhopal with good options of property for sale in Bhopal
NO1 Uk best vashikaran specialist in delhi vashikaran baba near me online vas...Amil Baba Dawood bangali
Contact with Dawood Bhai Just call on +92322-6382012 and we'll help you. We'll solve all your problems within 12 to 24 hours and with 101% guarantee and with astrology systematic. If you want to take any personal or professional advice then also you can call us on +92322-6382012 , ONLINE LOVE PROBLEM & Other all types of Daily Life Problem's.Then CALL or WHATSAPP us on +92322-6382012 and Get all these problems solutions here by Amil Baba DAWOOD BANGALI
#vashikaranspecialist #astrologer #palmistry #amliyaat #taweez #manpasandshadi #horoscope #spiritual #lovelife #lovespell #marriagespell#aamilbabainpakistan #amilbabainkarachi #powerfullblackmagicspell #kalajadumantarspecialist #realamilbaba #AmilbabainPakistan #astrologerincanada #astrologerindubai #lovespellsmaster #kalajaduspecialist #lovespellsthatwork #aamilbabainlahore#blackmagicformarriage #aamilbaba #kalajadu #kalailam #taweez #wazifaexpert #jadumantar #vashikaranspecialist #astrologer #palmistry #amliyaat #taweez #manpasandshadi #horoscope #spiritual #lovelife #lovespell #marriagespell#aamilbabainpakistan #amilbabainkarachi #powerfullblackmagicspell #kalajadumantarspecialist #realamilbaba #AmilbabainPakistan #astrologerincanada #astrologerindubai #lovespellsmaster #kalajaduspecialist #lovespellsthatwork #aamilbabainlahore #blackmagicforlove #blackmagicformarriage #aamilbaba #kalajadu #kalailam #taweez #wazifaexpert #jadumantar #vashikaranspecialist #astrologer #palmistry #amliyaat #taweez #manpasandshadi #horoscope #spiritual #lovelife #lovespell #marriagespell#aamilbabainpakistan #amilbabainkarachi #powerfullblackmagicspell #kalajadumantarspecialist #realamilbaba #AmilbabainPakistan #astrologerincanada #astrologerindubai #lovespellsmaster #kalajaduspecialist #lovespellsthatwork #aamilbabainlahore #Amilbabainuk #amilbabainspain #amilbabaindubai #Amilbabainnorway #amilbabainkrachi #amilbabainlahore #amilbabaingujranwalan #amilbabainislamabad
Sachpazis:Terzaghi Bearing Capacity Estimation in simple terms with Calculati...Dr.Costas Sachpazis
Terzaghi's soil bearing capacity theory, developed by Karl Terzaghi, is a fundamental principle in geotechnical engineering used to determine the bearing capacity of shallow foundations. This theory provides a method to calculate the ultimate bearing capacity of soil, which is the maximum load per unit area that the soil can support without undergoing shear failure. The Calculation HTML Code included.
Using recycled concrete aggregates (RCA) for pavements is crucial to achieving sustainability. Implementing RCA for new pavement can minimize carbon footprint, conserve natural resources, reduce harmful emissions, and lower life cycle costs. Compared to natural aggregate (NA), RCA pavement has fewer comprehensive studies and sustainability assessments.
Cosmetic shop management system project report.pdfKamal Acharya
Buying new cosmetic products is difficult. It can even be scary for those who have sensitive skin and are prone to skin trouble. The information needed to alleviate this problem is on the back of each product, but it's thought to interpret those ingredient lists unless you have a background in chemistry.
Instead of buying and hoping for the best, we can use data science to help us predict which products may be good fits for us. It includes various function programs to do the above mentioned tasks.
Data file handling has been effectively used in the program.
The automated cosmetic shop management system should deal with the automation of general workflow and administration process of the shop. The main processes of the system focus on customer's request where the system is able to search the most appropriate products and deliver it to the customers. It should help the employees to quickly identify the list of cosmetic product that have reached the minimum quantity and also keep a track of expired date for each cosmetic product. It should help the employees to find the rack number in which the product is placed.It is also Faster and more efficient way.
Student information management system project report ii.pdfKamal Acharya
Our project explains about the student management. This project mainly explains the various actions related to student details. This project shows some ease in adding, editing and deleting the student details. It also provides a less time consuming process for viewing, adding, editing and deleting the marks of the students.
Hybrid optimization of pumped hydro system and solar- Engr. Abdul-Azeez.pdffxintegritypublishin
Advancements in technology unveil a myriad of electrical and electronic breakthroughs geared towards efficiently harnessing limited resources to meet human energy demands. The optimization of hybrid solar PV panels and pumped hydro energy supply systems plays a pivotal role in utilizing natural resources effectively. This initiative not only benefits humanity but also fosters environmental sustainability. The study investigated the design optimization of these hybrid systems, focusing on understanding solar radiation patterns, identifying geographical influences on solar radiation, formulating a mathematical model for system optimization, and determining the optimal configuration of PV panels and pumped hydro storage. Through a comparative analysis approach and eight weeks of data collection, the study addressed key research questions related to solar radiation patterns and optimal system design. The findings highlighted regions with heightened solar radiation levels, showcasing substantial potential for power generation and emphasizing the system's efficiency. Optimizing system design significantly boosted power generation, promoted renewable energy utilization, and enhanced energy storage capacity. The study underscored the benefits of optimizing hybrid solar PV panels and pumped hydro energy supply systems for sustainable energy usage. Optimizing the design of solar PV panels and pumped hydro energy supply systems as examined across diverse climatic conditions in a developing country, not only enhances power generation but also improves the integration of renewable energy sources and boosts energy storage capacities, particularly beneficial for less economically prosperous regions. Additionally, the study provides valuable insights for advancing energy research in economically viable areas. Recommendations included conducting site-specific assessments, utilizing advanced modeling tools, implementing regular maintenance protocols, and enhancing communication among system components.
Welcome to WIPAC Monthly the magazine brought to you by the LinkedIn Group Water Industry Process Automation & Control.
In this month's edition, along with this month's industry news to celebrate the 13 years since the group was created we have articles including
A case study of the used of Advanced Process Control at the Wastewater Treatment works at Lleida in Spain
A look back on an article on smart wastewater networks in order to see how the industry has measured up in the interim around the adoption of Digital Transformation in the Water Industry.
NUMERICAL SIMULATIONS OF HEAT AND MASS TRANSFER IN CONDENSING HEAT EXCHANGERS...ssuser7dcef0
Power plants release a large amount of water vapor into the
atmosphere through the stack. The flue gas can be a potential
source for obtaining much needed cooling water for a power
plant. If a power plant could recover and reuse a portion of this
moisture, it could reduce its total cooling water intake
requirement. One of the most practical way to recover water
from flue gas is to use a condensing heat exchanger. The power
plant could also recover latent heat due to condensation as well
as sensible heat due to lowering the flue gas exit temperature.
Additionally, harmful acids released from the stack can be
reduced in a condensing heat exchanger by acid condensation. reduced in a condensing heat exchanger by acid condensation.
Condensation of vapors in flue gas is a complicated
phenomenon since heat and mass transfer of water vapor and
various acids simultaneously occur in the presence of noncondensable
gases such as nitrogen and oxygen. Design of a
condenser depends on the knowledge and understanding of the
heat and mass transfer processes. A computer program for
numerical simulations of water (H2O) and sulfuric acid (H2SO4)
condensation in a flue gas condensing heat exchanger was
developed using MATLAB. Governing equations based on
mass and energy balances for the system were derived to
predict variables such as flue gas exit temperature, cooling
water outlet temperature, mole fraction and condensation rates
of water and sulfuric acid vapors. The equations were solved
using an iterative solution technique with calculations of heat
and mass transfer coefficients and physical properties.
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2. Decisions taken both in the design process of buildings and their
modernization should comply with basic requirements, such as: strength
and stability, resistance to dampness and water, resistance to fire, heat
insulation, sound insulation, durability, comforts and conveniences.
Building materials should not have harmful effects on human health
The aspects of utilization, safe storage and recycling possibilities are also
important.
In the case of insulating materials, not only heat requirements, but also
other than thermal ones are taken into consideration (including
appropriate mechanical properties, noise attenuation, vibration
resistance, non-flammability, moisture absorption), as well as
technological and economic conditions
3.
4.
5.
6.
7.
8.
9.
10.
11. In this step the soil is excavated in steps and then laid on leveled
ground.
Then the soil is cleaned of impurities such as vegetation matter,
stones or pebbles etc. After removing impurities it is exposed to
weather for few months.
This is called the process of weathering. After completion of
weathering process the soil is blended with other material to
prepare good brick earth.
Then the mixed soil is tempered by being thoroughly broken up,
watered and kneaded.The tempering is usually done in pug mill.
12.
13. Bricks are moulded in many ways depending on the quality of the product to
be made. Generally the moulding is done in the following two ways
Hand moulding
Machine moulding
For hand moulding the tempered clay is forced in the mould in such a way that
it fills all the corners of the mould. Extra clay is removed either by wooden
strike or frame with wire. Mould is then lifted up and raw brick is left on
ground.
Machine moulding is used where large numbers of bricks are to be made.
Machines used for moulding is generally of two types.
Plastic clay machines
Dry clay machines
14. In plastic clay machine the clay in plastic state is forced to rectangular openings of a
size equal to the length and breadth of the bricks and are then cut into strips of
thickness of the brick with wires in frames.
In dry clay machines, dry clay is reduced to powder, filled dry into mould by the
machine and then are subjected to high pressure to form hard and well shaped bricks.
15.
16. Drying
Drying is usually done by placing the bricks in sheds with open sides so as to ensure
free circulation of air and protection from bad weather and rains.
The bricks are allowed to dry till they are left with 5 to 7 percent moisture content.
The drying period usually varies from 7 to 14days.
The moulded bricks are dried because of the following reasons.
If damp bricks or green bricks are directly taken to burning then, they are likely to
be cracked and distorted
To remove maximum moisture from the brick so as to save time and fuel during
burning
To increase the strength of raw bricks so that they can be handled and stacked in
greater heights in the kiln for burning without damage.
17.
18. It is the very important step in manufacture of bricks. Bricks may be burnt by two
distinct methods given below.
Burning in a clamp or Pazawah known as clamp burning
Burning in a flame kiln or Bhatta known as kiln burning
19. Clamp burning
• A portion of the ground usually in trapezoidal shape is selected. The floor of the kiln
is made in such a way that the wider edge of the trapezoidal is raised at an angle of
15 degrees from the ground.
• After making the ground, the layer of fuel of about 70-80 cm thickness is placed.
The fuel consists of cow dunk, husk or rice, and grass, etc. More superior fuel like
wood and coal dust can also be used.
• A stack of brick containing 4 to 5 layers is placed over this fuel leaving small spaces
in between for the circulation of air.
• The second layer of fuel is placed over it and then another layer of brick is placed.
The total height of the clamp is about 3 to 5 meters.
• Either it is fired during the stacking process or after the completion of the stacking.
The top and sides of the kiln are then covered with mud to prevent the escape of
heat. Burning to take place for about 2 to 3 months and additional 2 to 3 months are
required for cooling the burnt bricks
20.
21. This type of brick burning is superior to the burning in clamps. These types of brick
burning methods consist of a permanent structure.
Kiln is a large oven used for the burning of bricks. Generally coal and other locally
available materials like wood, cow dung etc can be used as fuel.They are of two types:
(a) Intermittent Kilns.
(b) Continuous Kilns.
Intermittent kiln
• In this type of kiln after loading raw bricks, it is fired, cooled, and unloaded. Only then
next set of bricks is again loaded and a similar process continues.
• They have a major disadvantage over continuous kiln that after unloading the bricks,
the kiln gets cooled.
• Thus have to be reheated again and in doing so there is a wastage of fuel.This type of
kiln is usually provided over ground and is rectangular in shape.These kilns are of two
types
22. Intermittent up drought kilns
Intermittent down drought kilns
Intermittent up drought kilns
• These kilns are rectangular in shape and consist of thick outer walls. Bricks are stacked in
rectangular shapes and some space is left between the stacks for the movement of flue
gases.
• In these kilns, flue gases move horizontally while in down drought kilns flue gases move
vertically towards the roof. Bricks are burnt for 48 to 60 hours during this time strong fire is
maintained.
23. Intermittent down drought kilns
• These kilns are more or less similar to the up-drought kilns and are rectangular or
circular in shape.
• They are also provided with permanent thick walls and roofs.
• The only difference is that flue gases are carried vertically up to the `roof and then
these gases move downward by the chimney drought and in doing so they burn
the bricks.
24. Continuous kiln
• Bull’s trench kiln and Hoffman’s kilns are examples of the continuous kiln.
• These types of kilns are divided into different chambers.The bricks are heated differently in
different chambers.
• When the brick in one chamber is fired, the bricks in the next chamber are dried and
preheated.
• Bricks in some chambers are loaded and in some chambers, it is cooled. So the brick burning
process is continuous and the kiln always remains heated
• When one chamber is heated the hot flue gases from this chamber moves to another
chamber and bricks placed on this chamber get preheated which will save the amount of
fuel for burning these bricks.
• Kiln burnt bricks yield about 80-90 % of the first-class bricks
25. Bull’sTrench Kiln
• Bull’s trench kiln consist of a rectangular, circular or oval plan shape. They are constructed
below the ground level by excavating a trench of the required width for the given capacity of
brick manufacturing
• This Trench is divided generally in 12 chambers so that 2 numbers of cycles of brick burning
can take place at the same time for the larger production of the bricks. Or it may happen that
one cycle is carried out at one time in all the 12 chambers by using a single process in the 2-3
chambers at the same time.
• The structure is under-ground so the heat is conserved to a large extent so it is more efficient.
• Once fire is started it constantly travels from one chamber to the other chamber, while other
operations like loading, unloading, cooling, burning and preheating taking place
simultaneously.
• Such kilns are generally constructed to have a manufacturing capacity of about 20,000 bricks
per day.
• The drawback of this kiln is that there is not a permanent roof, so it is not easy to manufacture
the bricks in the monsoon seasons
26.
27. Hoffman’s kiln
• Hoffman’s kiln is an over the ground structure while Bull’s Trench Kiln is an
underground structure.
• Hoffman’s kiln have a permanent roof while Bull’s trench Kiln do not have
so it former can be used in 12 months a year to manufacture bricks but later
is stopped in the monsoon season.
• Hoffman’s kiln is generally circular in plan, and is constructed over the
ground.
• The whole structure is divided into the 12 chambers and all the processes
takes place simultaneously like in Bull’s trench Kiln.
28.
29.
30.
31.
32.
33. First Class Bricks
These bricks are table moulded and burnt in kilns.
These are thoroughly burnt and are of deep red, cherry or copper colour.
The surface should be smooth and rectangular; parallel, sharp and straight edges and
square corner.
It should be free from flaws, cracks, and stones.
It should have a uniform texture.
No impression should be left on the brick when a scratch is made by a fingernail.
Fractured surface of the brick should not show lumps of lime.
Metallic ringing sound should come when two bricks are struck against each other.
On allowing immersed in cold water for 24 hours, water absorption should not be more
than 20% its dry weight.
Compressive strength >10.5 N/mm2.
Uses: First class bricks are recommended for pointing exposed face work in masonry
structure flooring and reinforced brickwork
34.
35.
36.
37.
38.
39. Silica:
• It is about 50 to 60% of dry weight of bricks in provided plasticity to bricks for easy
moulded and cast their rectangular shape, it prevent from cracking shrinking and
warping of bricks and also provide durability and uniform shape to bricks.
Alumina :
• Alumina is about 20%- 30% of dry weight of red clay bricks and it absorb water and
provide plasticity to bricks such that it can be easily moulded in Desire shape and gain
rectangular shape. if alumina is present in excess quantity it causes cracks in bricks and
drying and become too hard when burnt.
Lime:
Lime is about less than 10% of dry weight of bricks. it provide withstand of particles of
bricks at high temperature about 1600 degree Celsius in hot furnace during melting.
and get It original rectangular shape. excess of lime causes bricks to melt and loses its
shape.
40. Iron Oxide:
• it is used about less than 7% of dry weight of bricks. it provide red colour to
brick on burning when excess of oxygen is available and dark brown or even
black colour when oxygen is insufficient amount available but excess of ferric
oxide make the bricks to change its colour dark blue and also ferric oxide give
it strength and hardness
Magnesia :-
it can be used less than 1% of dry weight of bricks .it can be used in small
quantity ,magnesia in brick impart yellow colour and also provide decrease in
shrinkage but excess of magnesia lead to decay of red bricks.
41.
42. Various types of tests on bricks are conducted to check the qualities of bricks for
construction purposes.
Tests on bricks are conducted at construction site as well as in laboratory
To produce good quality of structure, good quality materials are required
Following tests are conducted on bricks to determine its suitability for construction work.
Absorption test
Crushing strength test
Hardness test
Shape and size
Color test
Soundness test
Structure of brick
Presence of soluble salts (Efflorescence Test)
43. Absorption test
• Absorption test is conducted on brick to find out the amount of moisture content absorbed
by brick under extreme conditions.
• In this test, sample dry bricks are taken and weighed. After weighing these bricks are placed
in water with full immersing for a period of 24 hours.
• Then weigh the wet brick and note down its value. The difference between dry and wet brick
weights will give the amount of water absorption.
• For a good quality brick the amount of water absorption should not exceed 20% of weight of
dry brick.
44. Crushing Strength or Compressive Strength
• Crushing strength of bricks is determined by placing brick in compression testing
machine.
• After placing the brick in compression testing machine, apply load on it until brick breaks.
Note down the value of failure load and find out the crushing strength value of brick.
Minimum crushing strength of brick is 3.50N/mm2.if it is less than 3.50 N/mm2, then it is
not useful for construction purpose.
45. HardnessTest
• A good brick should resist scratches against sharp things. So, for this test a sharp tool or
finger nail is used to make scratch on brick. If there is no scratch impression on brick
then it is said to be hard brick
46. Shape and SizeTest
Shape and size of bricks are very important consideration.
All bricks used for construction should be of same size.
The shape of bricks should be purely rectangular with sharp edges. Standard brick size consists
length x breadth x height as 19cm x 9cm x 9cm.
To perform this test, select 20 bricks randomly from brick group and stack them along its length ,
breadth and height and compare.
So, if all bricks similar size then they are qualified for construction work.
47.
48.
49. EfflorescenceTest
• A good quality brick should not contain any soluble salts in it. If soluble salts are there, then
it will cause efflorescence on brick surfaces.
• To know the presence of soluble salts in a brick, placed it in a water bath for 24 hours and
dry it in shade. After drying, observe the brick surface thoroughly.
• If there is any white or grey color deposits, then it contains soluble salts and not useful for
construction
50. Uses of DifferentTypes of Bricks
Bricks are widely used in construction industry for different purposes as following.
Good quality bricks (1st and 2nd class) are
used in the construction of buildings, tunnels, pitching works etc.
3rd class and unburnt bricks are used for temporary structures.
4th class bricks are used as aggregate for making concrete.
Bricks are also used for architectural purposes to give aesthetic appearance to
the structure.