File Name: cement properties and uses .zip
Small amounts of uncombined lime and magnesia also are present, along with alkalies and minor amounts of other elements. The most important hydraulic constituents are the calcium silicates, C 2 S and C 3 S. Then, for reasons that are not fully understood, hydration comes to a stop.
- The major cements: composition and properties
- Types of Cement Used In The Construction Industry
- PHYSICAL AND MECHANICAL PROPERTIES OF SOME SELECTED BRAND OF CEMENT USE IN KWARA STATE.
The major cements: composition and properties
Lost your password? Please enter your email address. You will receive a link and will create a new password via email. Sorry, you do not have permission to ask a question, You must login to ask question. Become VIP Member. Do you need to remove the ads? There are various types of cement used in concrete construction. Each type of cement has its properties, uses, and advantages based on composition materials used during its manufacture. Ordinary Portland cement is the most widely used type of cement, which is suitable for all general concrete construction.
It is the most commonly produced and used type of cement around the world, with annual global production of around 3. This cement is suitable for all kinds of concrete construction. Portland pozzolana cement is prepared by grinding pozzolanic clinker with Portland cement.
It is also produced by adding pozzolana with the addition of gypsum or calcium sulfate or by intimately and uniformly blending Portland cement and fine pozzolana. This cement has a high resistance to various chemical attacks on concrete compared with ordinary portland cement, and thus, it is widely used.
It is used in marine structures, sewage works, sewage works, and for laying concrete underwater, such as bridges, piers, dams, and mass concrete works, etc. Rapid hardening cement attains high strength in the early days; it is used in concrete where formworks are removed at an early stage and are similar to ordinary portland cement OPC.
The strength of rapid hardening cement at the three days is similar to 7 days strength of OPC with the same water-cement ratio.
Thus, the advantage of this cement is that formwork can be removed earlier, which increases the rate of construction and decreases the cost of construction by saving formwork cost. The difference between the quick setting cement and rapid hardening cement is that quick-setting cement sets earlier. At the same time, the rate of gain of strength is similar to Ordinary Portland Cement, while quick hardening cement gains strength quickly.
Formworks in both cases can be removed earlier. Quick setting cement is used where works is to be completed in very short period and for concreting in static or running water.
A small quantity of tricalcium aluminate makes the concrete to produce low heat of hydration. Low heat cement suitable for mass concrete construction like gravity dams, as the low heat of hydration, prevents the cracking of concrete due to heat. This cement has increased power against sulphates and is less reactive and initial setting time is greater than OPC. Sulfate resisting cement is used to reduce the risk of sulfate attack on concrete and thus is used in the construction of foundations where the soil has high sulfate content.
Sulfate resisting cement is used in construction exposed to severe sulfate action by water and soil in places like canals linings, culverts, retaining walls, siphons, etc. It can be used for works where economic considerations are predominant. High alumina cement is obtained by melting a mixture of bauxite and lime and grinding with the clinker.
It is a rapid hardening cement with initial and final setting time of about 3. The compressive strength of this cement is very high and more workable than ordinary portland cement and is used in works where concrete is subjected to high temperatures, frost, and acidic action. It is prepared from raw materials free from Iron oxide and is a type of ordinary portland cement, which is white. It is costlier and is used for architectural purposes such as precast curtain wall and facing panels, terrazzo surface, etc.
They are widely used for decorative works on floors. Air entraining cement is produced by adding indigenous air-entraining agents such as resins, glues, sodium salts of sulfates, etc. This type of cement is especially suited to improve the workability with a smaller water-cement ratio and to improve frost resistance of concrete.
This cement is mainly used for grouting anchor bolts and prestressed concrete ducts. It has the property of repelling water and is unaffected during monsoon or rains. Hydrophobic cement is mainly used for the construction of water structures such as dams, water tanks, spillways, water retaining structures, etc. Ordinary Portland cement OPC , portland pozzolana cement PPC , rapid hardening cement, quick-setting cement, low heat cement, sulfates resisting cement, blast furnace slag cement, high alumina cement, white cement, colored cement, air-entraining cement, expansive cement, and hydrographic cement.
It is used in marine structures, foundations, sewage works, sewage works, and for laying concrete underwater, such as bridges, piers, dams, and mass concrete works, etc. Sign Up Sign Up to The Constructor to ask questions, answer questions, write articles, and connect with other people. Have an account? Sign In Now. Free Signup or Login to continue Reading Remember Me! Don't have account, Sign Up Here. Forgot Password Lost your password? VIP Dashboard. Contents: 13 Types of Cement and their Uses 1.
Rapid Hardening Cement 4. Quick setting cement 5. Low Heat Cement 6. Sulfates Resisting Cement 7. Blast Furnace Slag Cement 8. High Alumina Cement 9. White Cement Colored cement Air Entraining Cement Expansive Cement Hydrographic cement FAQs on different types of Cement. What are the types of cement? Which type of Portland cement is most commonly used?
Ordinary Portland cement is most commonly used type of cement. What are the applications of ordinary Portland cement? What are the applications of Portland pozzolana cement? Where is hydrophobic cement used? Previous article. Next article. Gopal Mishra. Related Posts.
Types of Cement Used In The Construction Industry
Cement is a very useful binding material in construction. The applications of cement over various fields of construction have made it a very important civil engineering material. Hydraulic Cement. Please note that the information in Civiltoday. The information provided should not be used as a substitute for professional services.
PDF | On Oct 11, , Rehab O. Abdel Rahman and others published Introductory chapter: Properties and application of cement based materials | Find, read.
PHYSICAL AND MECHANICAL PROPERTIES OF SOME SELECTED BRAND OF CEMENT USE IN KWARA STATE.
In the construction industry, there are different types of cement. The differences between each type of cement are its properties, uses and composition materials used during the manufacturing process. Cement is a cover material which makes a bond between aggregates and reinforcing materials. Over the years, cement in Malaysia has further developed thanks to technology. There are different types of cement for different construction works.
Reviewed: January 11th Published: October 10th Cement Based Materials. Cement-based materials have been used to support human civilizations many decades ago. With the increasing advancement of human activities, these materials were modified to maintain their roles in our lives. The main function of cement is to act as hydraulic binder, which increases the bond between fragmented particles, so it can enable their use in different fields.
С левого экрана в камеру неотрывно смотрели Дэвид и агенты Смит и Колиандер. На ВР последняя стенка напоминала тонюсенькую пленку. Вокруг нее было черно от нитей, готовых ринуться внутрь.
Трюк? - Теперь уже Стратмор не мог скрыть свое раздражение. - Это вовсе не трюк.