SlideShare a Scribd company logo
Types of Cement
 August 31, 2015  S. C. Rangwala  Cement  0
In addition to ordinary cement, following are the other important types of cement:
1. Acid resistant cement
2. Blast furnace cement
3. Coloured cement
4. Expanding cement
5. High Alumina cement
6. Hydrophobic cement
7. Low heat cement
8. Pozzolana cement
RECENT POSTS
Shortcrete Types – Gunite
 January 9, 2017  0
Types of Scaöolding
 December 24, 2016  0
Spillway
 September 4, 2016  0
Types of Foundation
 August 25, 2016  0
FIND US ON FACEBOOK
HOME GEO HYDRO MATERIALS SURVEYING ABOUT US
SEARCH …
9. Quick setting cement
10. Rapid hardening cement
11. Sulphate resisting cement
12. White cement.
13. Air entraining cement
Above types of cement are discussed brieòy here:
Acid-resistant cement
Acid-resistant cement is composed of the following:
1. Acid-resistance aggregates such as quartz, quartzites, etc.
2. Additive such as sodium òuosilicate Na2SiF6
3. Aqueous solution of sodium silicate or soluble glass.
The addition of additive sodium òousilicate accelerates the hardening process of soluble glass
and it also increases the resistance of cement to acid and water.
The binding material of acid-resitance cement is soluble glass which is a water solution of
sodium silicate, Na2O.nSiO2 or potassium silicate, K2O.nSiO2, where n is the glass modulus.
The acid-resistance cement is used for acid-resistance and heat resistance coatings of
installations of chemical industry. It is not water-resistant and it fails when attacked by water
or weak acids. By adding 0.5 percent of linseed oil or 2 percent of ceresit, its resistance to the
water is increased and it is then known as the acid and water resistant cement.
Blast furnace cement
For this cement type, the slag as obtained from blast furnace is used. The slag is a waste
product in the manufacturing process of pig-iron and it contains the basic elements of
cement, namely alumina, lime and silica. The clinkers of cement are ground with about 60 to
65 percent of slag.
Be the first of your friends to like this
Civil Engineering Blog
122k likes
Like Page
The properties of this cement are more or less the same as those of ordinary cement. Its
strength in early days is less and hence it requires longer curing period. It proves to be
economical as slag, which is a waste product, is used in its manufacture. This cement is
durable, but not suitable for use in dry arid zones.
Coloured cement
The cement of desired colour may be obtained by intimately mixing mineral pigments with
ordinary cement. The amount of colouring material may vary from 5 to 10 percent. If this
percentage exceeds 10 percent, the strength of cement is aöected.
The chromium oxide gives green colour. The cobalt imparts blue colour. The iron oxide in
diöerent proportions gives brown, red or yellow colour. The manganese dioxide is used to
produce black or brown coloured cement.
These types of coloured cement are widely used for ñnishing of òoors, external surfaces,
artiñcial marble, window sill slabs, textured panel faces, stair treads, etc.
Expanding cement
This type of cement is produced by adding an expanding medium like sulpho-aluminate and a
stabilising agent to the ordinary cement. Hence this cement expands whereas other cements
shrink.
The expanding cement is used for construction of water retaining structures and also for
repairing the damaged concrete surfaces.
High Alumina cement
This cement is produced by grinding clinkers formed by calcining bauxite and lime. It is
speciñed that total alumina content should not be less than 32 percent and the ratio by
weight of alumina to lime should be between 0.85 to 1.30.
Hydrophobic cement
Hydrophobic cement
This type of cement contains admixtures which decreases the wetting ability of cement
grains. The usual hydrophobic admixtures are acidol, napthenesoap, oxidized petrolatum,
etc. Use of hydrophobic cement considerably increases the water resistance of an concrete.
Low heat cement
The considerable heat is produced during the setting of cement. In order to reduce the
amount of heat, this type of cement is used. It contains lower percentage of tricalcium
aluminate C3A of about 5% and higher percentage of dicalcium silicate C2S of about 46%.
This cement possesses less compressive strength. The initial setting time is about one hour
and ñnal setting time is about 10 hours. It is mainly used for mass concrete work.
Pozzolana cement
Pozzolana is a volcanic powder. It is found in Italy near Vesuvius. This type of cement is used
to prepare mass concrete of lean mix and for marine structures. It is also used in sewage
works ad for laying concrete under water.
Quick setting cement
This cement is produced by adding a small percentage of aluminium sulphate and by ñnely
grinding the cement. The percentage of gypsum or retarder for setting action is also greatly
reduced. The addition of aluminium sulphate and ñneness of grinding are responsible for
accelerating the setting action of cement. The setting action of cement starts within ñve
minutes after addition of water and it becomes hard like stone in less than 30 minutes or so.
The extreme care is to be taken when this cement is used as mixing and placing of concrete
are to be completed in a very short period. This type of cement is used to lay concrete under
static water or running water.
Rapid hardening cement
Rapid hardening cement
The initial and ñnal setting times of this cement are same as those of ordinary cement. But it
attains high strength in early days. It contains high percentage of tricalcium silicate C3S to the
extent of about 56%.
Sulphate resisting cement
In this cement, the percentage of tricalcium aluminate C3A is kept below 5 percent and it
results in the increase in resisting power against sulphates.
This type of cement is used for structures which are likely to be damaged by severe alkaline
conditions such as canal linings, culverts, siphons, etc.
White cement
This just a variety of ordinary cement and is prepared from such raw materials which are
practically free from colouring oxides of iron, manganese or chromium. For burning of this
cement, the oil fuel is used instead of coal. It is white in colour and is used for òoor ñnish,
plaster work, ornament work, etc.
Air entraining cement
It is produced by adding indigenous air entraining agents such as resins, glues, sodium salts
of Sulphates etc during the grinding of clinker. This type of cement is specially suited to
improve the workability with smaller water cement ratio and to improve frost resistance of
concrete.
Please follow and like us:
12k
Like Tweet 8 Share 31
PREVIOUS ARTICLE NEXT ARTICLE
Related Post
Cement Ingredients
The ordinary cement contains two basic ingredients, namely, argillaceous and calcareous. In argillaceous
materials, the clay predominates and in calce...
Cement Manufacturing Process
The entire manufacturing process in a modern plant is now controlled through a microprocessor based
programmable logic control system to maintain unif...
Cement Industry
The manufacturing of Portland cement was started in England around 1825. Belgium and Germany started
the cement industries in 1855. America started th...
Cement
A cement is a binder, a substance that sets and hardens and can bind other materials together. It is a
powdery substance made by calcining lime and cl...
Copyright © 2017

More Related Content

Similar to Types of Cement.pdf

Concrete #1.pptx
Concrete #1.pptxConcrete #1.pptx
Concrete #1.pptx
Hameed75
 
Building Materials.pptx
Building Materials.pptxBuilding Materials.pptx
Building Materials.pptx
Vinayaka Begari
 
Cement
CementCement
Cement
Cement Cement
Introduction to Cement
Introduction to CementIntroduction to Cement
Introduction to Cement
Anshuman Mishra
 
2. TYPES OF CEMEMT.ppt
2. TYPES OF CEMEMT.ppt2. TYPES OF CEMEMT.ppt
2. TYPES OF CEMEMT.ppt
MOHANRAJ352312
 
Building materials
Building materialsBuilding materials
Building materials
Sanjeev Kumar
 
cement, bricks and their types.
cement, bricks and their types.cement, bricks and their types.
cement, bricks and their types.
Abdur Rauf Mashwani
 
Construction materials.pptx
Construction materials.pptxConstruction materials.pptx
Construction materials.pptx
SusmitaMulayPatil
 
CTEP - UNIT - II - CEMENT
CTEP - UNIT - II - CEMENTCTEP - UNIT - II - CEMENT
CTEP - UNIT - II - CEMENT
Shankar Ramasamy
 
Cement
CementCement
Cement
gautam2143
 
cementing raw materials plaster gypsum cement.pptx
cementing raw materials plaster gypsum cement.pptxcementing raw materials plaster gypsum cement.pptx
cementing raw materials plaster gypsum cement.pptx
VaishnaviThirunavukk
 
cement ppt
cement pptcement ppt
cement ppt
HarishKumar2000
 
Building material
Building materialBuilding material
Building material
Manisha Agarwal
 
ADVANCED CONCRETE TECHNOLOGY (CE361)
ADVANCED CONCRETE TECHNOLOGY  (CE361)ADVANCED CONCRETE TECHNOLOGY  (CE361)
ADVANCED CONCRETE TECHNOLOGY (CE361)
VISHNU VIJAYAN
 
CE 6506 CONSTRUCTION TECHNIQUES EQUIPMENTS & PRACTICE
CE 6506 CONSTRUCTION  TECHNIQUES  EQUIPMENTS  & PRACTICE CE 6506 CONSTRUCTION  TECHNIQUES  EQUIPMENTS  & PRACTICE
CE 6506 CONSTRUCTION TECHNIQUES EQUIPMENTS & PRACTICE
Anbarasan Muthaiyah
 
Chapter 5 plain and reinforced cement concrete construction
Chapter 5 plain and reinforced cement concrete constructionChapter 5 plain and reinforced cement concrete construction
Chapter 5 plain and reinforced cement concrete construction
KHUSHBU SHAH
 
Cement
CementCement
Cement
Sameer Nawab
 
Cement intro
Cement introCement intro
Cement intro
Rimpi Baro
 

Similar to Types of Cement.pdf (20)

Concrete #1.pptx
Concrete #1.pptxConcrete #1.pptx
Concrete #1.pptx
 
Building Materials.pptx
Building Materials.pptxBuilding Materials.pptx
Building Materials.pptx
 
Cement
CementCement
Cement
 
Cement
Cement Cement
Cement
 
Introduction to Cement
Introduction to CementIntroduction to Cement
Introduction to Cement
 
2. TYPES OF CEMEMT.ppt
2. TYPES OF CEMEMT.ppt2. TYPES OF CEMEMT.ppt
2. TYPES OF CEMEMT.ppt
 
Building materials
Building materialsBuilding materials
Building materials
 
cement, bricks and their types.
cement, bricks and their types.cement, bricks and their types.
cement, bricks and their types.
 
Construction materials.pptx
Construction materials.pptxConstruction materials.pptx
Construction materials.pptx
 
CTEP - UNIT - II - CEMENT
CTEP - UNIT - II - CEMENTCTEP - UNIT - II - CEMENT
CTEP - UNIT - II - CEMENT
 
Cement
CementCement
Cement
 
cementing raw materials plaster gypsum cement.pptx
cementing raw materials plaster gypsum cement.pptxcementing raw materials plaster gypsum cement.pptx
cementing raw materials plaster gypsum cement.pptx
 
cement ppt
cement pptcement ppt
cement ppt
 
Cement
CementCement
Cement
 
Building material
Building materialBuilding material
Building material
 
ADVANCED CONCRETE TECHNOLOGY (CE361)
ADVANCED CONCRETE TECHNOLOGY  (CE361)ADVANCED CONCRETE TECHNOLOGY  (CE361)
ADVANCED CONCRETE TECHNOLOGY (CE361)
 
CE 6506 CONSTRUCTION TECHNIQUES EQUIPMENTS & PRACTICE
CE 6506 CONSTRUCTION  TECHNIQUES  EQUIPMENTS  & PRACTICE CE 6506 CONSTRUCTION  TECHNIQUES  EQUIPMENTS  & PRACTICE
CE 6506 CONSTRUCTION TECHNIQUES EQUIPMENTS & PRACTICE
 
Chapter 5 plain and reinforced cement concrete construction
Chapter 5 plain and reinforced cement concrete constructionChapter 5 plain and reinforced cement concrete construction
Chapter 5 plain and reinforced cement concrete construction
 
Cement
CementCement
Cement
 
Cement intro
Cement introCement intro
Cement intro
 

Recently uploaded

1.4 modern child centered education - mahatma gandhi-2.pptx
1.4 modern child centered education - mahatma gandhi-2.pptx1.4 modern child centered education - mahatma gandhi-2.pptx
1.4 modern child centered education - mahatma gandhi-2.pptx
JosvitaDsouza2
 
Sha'Carri Richardson Presentation 202345
Sha'Carri Richardson Presentation 202345Sha'Carri Richardson Presentation 202345
Sha'Carri Richardson Presentation 202345
beazzy04
 
Synthetic Fiber Construction in lab .pptx
Synthetic Fiber Construction in lab .pptxSynthetic Fiber Construction in lab .pptx
Synthetic Fiber Construction in lab .pptx
Pavel ( NSTU)
 
Instructions for Submissions thorugh G- Classroom.pptx
Instructions for Submissions thorugh G- Classroom.pptxInstructions for Submissions thorugh G- Classroom.pptx
Instructions for Submissions thorugh G- Classroom.pptx
Jheel Barad
 
2024.06.01 Introducing a competency framework for languag learning materials ...
2024.06.01 Introducing a competency framework for languag learning materials ...2024.06.01 Introducing a competency framework for languag learning materials ...
2024.06.01 Introducing a competency framework for languag learning materials ...
Sandy Millin
 
Sectors of the Indian Economy - Class 10 Study Notes pdf
Sectors of the Indian Economy - Class 10 Study Notes pdfSectors of the Indian Economy - Class 10 Study Notes pdf
Sectors of the Indian Economy - Class 10 Study Notes pdf
Vivekanand Anglo Vedic Academy
 
Fish and Chips - have they had their chips
Fish and Chips - have they had their chipsFish and Chips - have they had their chips
Fish and Chips - have they had their chips
GeoBlogs
 
Home assignment II on Spectroscopy 2024 Answers.pdf
Home assignment II on Spectroscopy 2024 Answers.pdfHome assignment II on Spectroscopy 2024 Answers.pdf
Home assignment II on Spectroscopy 2024 Answers.pdf
Tamralipta Mahavidyalaya
 
Welcome to TechSoup New Member Orientation and Q&A (May 2024).pdf
Welcome to TechSoup   New Member Orientation and Q&A (May 2024).pdfWelcome to TechSoup   New Member Orientation and Q&A (May 2024).pdf
Welcome to TechSoup New Member Orientation and Q&A (May 2024).pdf
TechSoup
 
The Challenger.pdf DNHS Official Publication
The Challenger.pdf DNHS Official PublicationThe Challenger.pdf DNHS Official Publication
The Challenger.pdf DNHS Official Publication
Delapenabediema
 
The geography of Taylor Swift - some ideas
The geography of Taylor Swift - some ideasThe geography of Taylor Swift - some ideas
The geography of Taylor Swift - some ideas
GeoBlogs
 
special B.ed 2nd year old paper_20240531.pdf
special B.ed 2nd year old paper_20240531.pdfspecial B.ed 2nd year old paper_20240531.pdf
special B.ed 2nd year old paper_20240531.pdf
Special education needs
 
The Art Pastor's Guide to Sabbath | Steve Thomason
The Art Pastor's Guide to Sabbath | Steve ThomasonThe Art Pastor's Guide to Sabbath | Steve Thomason
The Art Pastor's Guide to Sabbath | Steve Thomason
Steve Thomason
 
Phrasal Verbs.XXXXXXXXXXXXXXXXXXXXXXXXXX
Phrasal Verbs.XXXXXXXXXXXXXXXXXXXXXXXXXXPhrasal Verbs.XXXXXXXXXXXXXXXXXXXXXXXXXX
Phrasal Verbs.XXXXXXXXXXXXXXXXXXXXXXXXXX
MIRIAMSALINAS13
 
Introduction to Quality Improvement Essentials
Introduction to Quality Improvement EssentialsIntroduction to Quality Improvement Essentials
Introduction to Quality Improvement Essentials
Excellence Foundation for South Sudan
 
aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
siemaillard
 
Cambridge International AS A Level Biology Coursebook - EBook (MaryFosbery J...
Cambridge International AS  A Level Biology Coursebook - EBook (MaryFosbery J...Cambridge International AS  A Level Biology Coursebook - EBook (MaryFosbery J...
Cambridge International AS A Level Biology Coursebook - EBook (MaryFosbery J...
AzmatAli747758
 
The French Revolution Class 9 Study Material pdf free download
The French Revolution Class 9 Study Material pdf free downloadThe French Revolution Class 9 Study Material pdf free download
The French Revolution Class 9 Study Material pdf free download
Vivekanand Anglo Vedic Academy
 
Unit 2- Research Aptitude (UGC NET Paper I).pdf
Unit 2- Research Aptitude (UGC NET Paper I).pdfUnit 2- Research Aptitude (UGC NET Paper I).pdf
Unit 2- Research Aptitude (UGC NET Paper I).pdf
Thiyagu K
 
CLASS 11 CBSE B.St Project AIDS TO TRADE - INSURANCE
CLASS 11 CBSE B.St Project AIDS TO TRADE - INSURANCECLASS 11 CBSE B.St Project AIDS TO TRADE - INSURANCE
CLASS 11 CBSE B.St Project AIDS TO TRADE - INSURANCE
BhavyaRajput3
 

Recently uploaded (20)

1.4 modern child centered education - mahatma gandhi-2.pptx
1.4 modern child centered education - mahatma gandhi-2.pptx1.4 modern child centered education - mahatma gandhi-2.pptx
1.4 modern child centered education - mahatma gandhi-2.pptx
 
Sha'Carri Richardson Presentation 202345
Sha'Carri Richardson Presentation 202345Sha'Carri Richardson Presentation 202345
Sha'Carri Richardson Presentation 202345
 
Synthetic Fiber Construction in lab .pptx
Synthetic Fiber Construction in lab .pptxSynthetic Fiber Construction in lab .pptx
Synthetic Fiber Construction in lab .pptx
 
Instructions for Submissions thorugh G- Classroom.pptx
Instructions for Submissions thorugh G- Classroom.pptxInstructions for Submissions thorugh G- Classroom.pptx
Instructions for Submissions thorugh G- Classroom.pptx
 
2024.06.01 Introducing a competency framework for languag learning materials ...
2024.06.01 Introducing a competency framework for languag learning materials ...2024.06.01 Introducing a competency framework for languag learning materials ...
2024.06.01 Introducing a competency framework for languag learning materials ...
 
Sectors of the Indian Economy - Class 10 Study Notes pdf
Sectors of the Indian Economy - Class 10 Study Notes pdfSectors of the Indian Economy - Class 10 Study Notes pdf
Sectors of the Indian Economy - Class 10 Study Notes pdf
 
Fish and Chips - have they had their chips
Fish and Chips - have they had their chipsFish and Chips - have they had their chips
Fish and Chips - have they had their chips
 
Home assignment II on Spectroscopy 2024 Answers.pdf
Home assignment II on Spectroscopy 2024 Answers.pdfHome assignment II on Spectroscopy 2024 Answers.pdf
Home assignment II on Spectroscopy 2024 Answers.pdf
 
Welcome to TechSoup New Member Orientation and Q&A (May 2024).pdf
Welcome to TechSoup   New Member Orientation and Q&A (May 2024).pdfWelcome to TechSoup   New Member Orientation and Q&A (May 2024).pdf
Welcome to TechSoup New Member Orientation and Q&A (May 2024).pdf
 
The Challenger.pdf DNHS Official Publication
The Challenger.pdf DNHS Official PublicationThe Challenger.pdf DNHS Official Publication
The Challenger.pdf DNHS Official Publication
 
The geography of Taylor Swift - some ideas
The geography of Taylor Swift - some ideasThe geography of Taylor Swift - some ideas
The geography of Taylor Swift - some ideas
 
special B.ed 2nd year old paper_20240531.pdf
special B.ed 2nd year old paper_20240531.pdfspecial B.ed 2nd year old paper_20240531.pdf
special B.ed 2nd year old paper_20240531.pdf
 
The Art Pastor's Guide to Sabbath | Steve Thomason
The Art Pastor's Guide to Sabbath | Steve ThomasonThe Art Pastor's Guide to Sabbath | Steve Thomason
The Art Pastor's Guide to Sabbath | Steve Thomason
 
Phrasal Verbs.XXXXXXXXXXXXXXXXXXXXXXXXXX
Phrasal Verbs.XXXXXXXXXXXXXXXXXXXXXXXXXXPhrasal Verbs.XXXXXXXXXXXXXXXXXXXXXXXXXX
Phrasal Verbs.XXXXXXXXXXXXXXXXXXXXXXXXXX
 
Introduction to Quality Improvement Essentials
Introduction to Quality Improvement EssentialsIntroduction to Quality Improvement Essentials
Introduction to Quality Improvement Essentials
 
aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
 
Cambridge International AS A Level Biology Coursebook - EBook (MaryFosbery J...
Cambridge International AS  A Level Biology Coursebook - EBook (MaryFosbery J...Cambridge International AS  A Level Biology Coursebook - EBook (MaryFosbery J...
Cambridge International AS A Level Biology Coursebook - EBook (MaryFosbery J...
 
The French Revolution Class 9 Study Material pdf free download
The French Revolution Class 9 Study Material pdf free downloadThe French Revolution Class 9 Study Material pdf free download
The French Revolution Class 9 Study Material pdf free download
 
Unit 2- Research Aptitude (UGC NET Paper I).pdf
Unit 2- Research Aptitude (UGC NET Paper I).pdfUnit 2- Research Aptitude (UGC NET Paper I).pdf
Unit 2- Research Aptitude (UGC NET Paper I).pdf
 
CLASS 11 CBSE B.St Project AIDS TO TRADE - INSURANCE
CLASS 11 CBSE B.St Project AIDS TO TRADE - INSURANCECLASS 11 CBSE B.St Project AIDS TO TRADE - INSURANCE
CLASS 11 CBSE B.St Project AIDS TO TRADE - INSURANCE
 

Types of Cement.pdf

  • 1. Types of Cement  August 31, 2015  S. C. Rangwala  Cement  0 In addition to ordinary cement, following are the other important types of cement: 1. Acid resistant cement 2. Blast furnace cement 3. Coloured cement 4. Expanding cement 5. High Alumina cement 6. Hydrophobic cement 7. Low heat cement 8. Pozzolana cement RECENT POSTS Shortcrete Types – Gunite  January 9, 2017  0 Types of Scaöolding  December 24, 2016  0 Spillway  September 4, 2016  0 Types of Foundation  August 25, 2016  0 FIND US ON FACEBOOK HOME GEO HYDRO MATERIALS SURVEYING ABOUT US SEARCH …
  • 2. 9. Quick setting cement 10. Rapid hardening cement 11. Sulphate resisting cement 12. White cement. 13. Air entraining cement Above types of cement are discussed brieòy here: Acid-resistant cement Acid-resistant cement is composed of the following: 1. Acid-resistance aggregates such as quartz, quartzites, etc. 2. Additive such as sodium òuosilicate Na2SiF6 3. Aqueous solution of sodium silicate or soluble glass. The addition of additive sodium òousilicate accelerates the hardening process of soluble glass and it also increases the resistance of cement to acid and water. The binding material of acid-resitance cement is soluble glass which is a water solution of sodium silicate, Na2O.nSiO2 or potassium silicate, K2O.nSiO2, where n is the glass modulus. The acid-resistance cement is used for acid-resistance and heat resistance coatings of installations of chemical industry. It is not water-resistant and it fails when attacked by water or weak acids. By adding 0.5 percent of linseed oil or 2 percent of ceresit, its resistance to the water is increased and it is then known as the acid and water resistant cement. Blast furnace cement For this cement type, the slag as obtained from blast furnace is used. The slag is a waste product in the manufacturing process of pig-iron and it contains the basic elements of cement, namely alumina, lime and silica. The clinkers of cement are ground with about 60 to 65 percent of slag. Be the first of your friends to like this Civil Engineering Blog 122k likes Like Page
  • 3. The properties of this cement are more or less the same as those of ordinary cement. Its strength in early days is less and hence it requires longer curing period. It proves to be economical as slag, which is a waste product, is used in its manufacture. This cement is durable, but not suitable for use in dry arid zones. Coloured cement The cement of desired colour may be obtained by intimately mixing mineral pigments with ordinary cement. The amount of colouring material may vary from 5 to 10 percent. If this percentage exceeds 10 percent, the strength of cement is aöected. The chromium oxide gives green colour. The cobalt imparts blue colour. The iron oxide in diöerent proportions gives brown, red or yellow colour. The manganese dioxide is used to produce black or brown coloured cement. These types of coloured cement are widely used for ñnishing of òoors, external surfaces, artiñcial marble, window sill slabs, textured panel faces, stair treads, etc. Expanding cement This type of cement is produced by adding an expanding medium like sulpho-aluminate and a stabilising agent to the ordinary cement. Hence this cement expands whereas other cements shrink. The expanding cement is used for construction of water retaining structures and also for repairing the damaged concrete surfaces. High Alumina cement This cement is produced by grinding clinkers formed by calcining bauxite and lime. It is speciñed that total alumina content should not be less than 32 percent and the ratio by weight of alumina to lime should be between 0.85 to 1.30. Hydrophobic cement
  • 4. Hydrophobic cement This type of cement contains admixtures which decreases the wetting ability of cement grains. The usual hydrophobic admixtures are acidol, napthenesoap, oxidized petrolatum, etc. Use of hydrophobic cement considerably increases the water resistance of an concrete. Low heat cement The considerable heat is produced during the setting of cement. In order to reduce the amount of heat, this type of cement is used. It contains lower percentage of tricalcium aluminate C3A of about 5% and higher percentage of dicalcium silicate C2S of about 46%. This cement possesses less compressive strength. The initial setting time is about one hour and ñnal setting time is about 10 hours. It is mainly used for mass concrete work. Pozzolana cement Pozzolana is a volcanic powder. It is found in Italy near Vesuvius. This type of cement is used to prepare mass concrete of lean mix and for marine structures. It is also used in sewage works ad for laying concrete under water. Quick setting cement This cement is produced by adding a small percentage of aluminium sulphate and by ñnely grinding the cement. The percentage of gypsum or retarder for setting action is also greatly reduced. The addition of aluminium sulphate and ñneness of grinding are responsible for accelerating the setting action of cement. The setting action of cement starts within ñve minutes after addition of water and it becomes hard like stone in less than 30 minutes or so. The extreme care is to be taken when this cement is used as mixing and placing of concrete are to be completed in a very short period. This type of cement is used to lay concrete under static water or running water. Rapid hardening cement
  • 5. Rapid hardening cement The initial and ñnal setting times of this cement are same as those of ordinary cement. But it attains high strength in early days. It contains high percentage of tricalcium silicate C3S to the extent of about 56%. Sulphate resisting cement In this cement, the percentage of tricalcium aluminate C3A is kept below 5 percent and it results in the increase in resisting power against sulphates. This type of cement is used for structures which are likely to be damaged by severe alkaline conditions such as canal linings, culverts, siphons, etc. White cement This just a variety of ordinary cement and is prepared from such raw materials which are practically free from colouring oxides of iron, manganese or chromium. For burning of this cement, the oil fuel is used instead of coal. It is white in colour and is used for òoor ñnish, plaster work, ornament work, etc. Air entraining cement It is produced by adding indigenous air entraining agents such as resins, glues, sodium salts of Sulphates etc during the grinding of clinker. This type of cement is specially suited to improve the workability with smaller water cement ratio and to improve frost resistance of concrete. Please follow and like us: 12k Like Tweet 8 Share 31
  • 6. PREVIOUS ARTICLE NEXT ARTICLE Related Post Cement Ingredients The ordinary cement contains two basic ingredients, namely, argillaceous and calcareous. In argillaceous materials, the clay predominates and in calce... Cement Manufacturing Process The entire manufacturing process in a modern plant is now controlled through a microprocessor based programmable logic control system to maintain unif... Cement Industry The manufacturing of Portland cement was started in England around 1825. Belgium and Germany started the cement industries in 1855. America started th... Cement A cement is a binder, a substance that sets and hardens and can bind other materials together. It is a powdery substance made by calcining lime and cl... Copyright © 2017