What is the use of clinker in cement?
Clinker is primarily used to produce cement. Since it can be stored in dry condition for several months without noticeable deterioration, it is traded internationally in large amounts. Cement manufacturers buy clinker for their cement plants in areas where raw materials for cement are scarce or unavailable.
Why is clinker important?
Clinker, the residue formed by high-temperature burning of coal or similar materials, plays an important role in the composition of cement and contributes to the properties of cement in different ways.
What are the 6 properties of concrete?
The following are the properties of concrete in its hardened state, used by the designer during design process of reinforced concrete structure.
- Compressive Strength.
- Tensile Strength.
- Modulus Elasticity.
- Shrinkage of Concrete.
- Creep of Concrete.
- Coefficient of Thermal Expansion.
What is difference between clinker and limestone?
It is concluded that the presence of the easily ground limestone leads to a wider particle size distribution of the mixture. In addition, limestone is concentrated in the fine fractions (<8μm) while the clinker is concentrated in the coarser fractions.
What is composition of clinker?
Composition and preparation The Portland clinker essentially consists of four mineral phases: two calcium silicates, alite (Ca3Si) and belite (Ca2Si), along with tricalcium aluminate (Ca3Al) and calcium aluminoferrite (Ca4AlFe). These main mineral phases are produced by heating at high temperature clays and limestone.
What is the composition of cement clinker?
Portland cement clinker is a hydraulic material which shall consist of at least two-thirds by mass of calcium silicates (3CaO. SiO2 and 2CaO. SiO2), the remainder consisting of aluminium and iron containing clinker phases and other compounds.
What is the difference between clinker and cement?
The main differences between clinker and cement are given below. Clinker is a nodular material which is used as the binder in cement products. Cement is a binding agent that sets and hardens to adhere to building units such as stones, bricks, tiles etc. The primary use of clinker is to manufacture cement.
What are the principal properties of good concrete?
For reduced tendency of cracking, essential properties of the concrete are :
- Low thermal coefficient of expansion.
- Low drying shrinkage.
- Absence of internal or external restraint,
- Low elasticity.
- High creep.
- High extensibility.
- High tensile strength.
What is the most important property of concrete?
The tensile strength of concrete is an important property which affects the extent & width of cracks in the structure. A good concrete should have a tensile strength of 1/10 times that of compressive strength.
What is the difference between cement and cement clinker?
Clinker is a nodular material which is used as the binder in cement products. Cement is a binding agent that sets and hardens to adhere to building units such as stones, bricks, tiles etc. Clinker is a granular substance containing spherical pellets of diameter 3-25 mm.
What is cement clinker ratio?
The world average clinker/cement ratio is about 0.81, with the balance comprising gypsum and additives such as blast furnace slag, fly ash, and natural pozzolana.
What is the diameter of clinker?
Clinker occurs as lumps or nodules, usually 3 millimetres (0.12 in) to 25 millimetres (0.98 in) in diameter. It is produced by sintering (fusing together without melting to the point of liquefaction) limestone and aluminosilicate materials such as clay during the cement kiln stage.
What happens when you add clinker to cement?
Clinker, when added with gypsum (to control the setting properties of cement and ensure compressive strength) and ground finely, produces cement.
What’s the temperature of a Portland cement clinker?
Portland cement clinker – overview. Portland cement clinker is a dark grey nodular material made by heating ground limestone and clay at a temperature of about 1400 °C – 1500 °C. The nodules are ground up to a fine powder to produce cement, with a small amount of gypsum added to control the setting properties.
What are the properties of a clinker block?
In a clinker block have a thermal conductivity is 1.17 w/ms. In a clinker bricks have thermal conductivity. They have a maintain 1.15 v/MK. Compressive strength of clinker bricks is 250 to 350 kg sq cm. (what is clinker block) As a safety barrier.
What is the composition of cement clinker slag?
It is no longer produced because cement produced from ordinary clinker and ground granulated blast furnace slag has excellent low heat properties. It contains 76% alite, 15% belite, 7% tricalcium aluminate, no tetracalcium aluminoferrite, and 2% free lime, but the composition may vary widely.