How cement is made PPT?
12. Portland Cement • Limestone + Shale/Clay + Heat = Clinker + CKD + Exit Gas. Material Temperatures Exceed 2700 degrees F • Pulverized Clinker + Gypsum = Portland Cement. Cement is powder so fine that one pound contains 150 billion grains.
What is the chemistry of cement?
The most important compounds present in cement are: 3CaO·Al2O3, tricalcium aluminate; 3CaO·SiO3, tricalcium silicate; 2CaO·SiO3, dicalcium silicate; and CaO, calcium oxide. The 2CaO·SiO3 reacts slowly with water to yield Ca(OH)2 and H2SiO3.
What is cement PDF?
Cement is an extremely fine material having adhesive and cohesive properties which provides a binding medium for the discrete ingredients. Cement is a product obtained by pulverizing clinker formed by calcinating raw-materials primarily consisting of lime (CaO), silicate (SiO2), Alumina (Al2O3), and Iron oxide (Fe2O3).
How is cement manufactured PDF?
Cement Manufacturing Process
- Stage 1. Raw Material Extraction/Quarry.
- Stage 2. Grinding, Proportioning and Blending.
- Stage 3. Pre-Heating Raw Material.
- Stage 4. Kiln Phase.
- Stage 5. Cooling and final grinding.
- Stage 6. Packing and Shipping.
How cement is made step by step?
There are four stages in the manufacture of portland cement: (1) crushing and grinding the raw materials, (2) blending the materials in the correct proportions, (3) burning the prepared mix in a kiln, and (4) grinding the burned product, known as “clinker,” together with some 5 percent of gypsum (to control the time of …
How is cement made chemistry?
Cement is manufactured through a closely controlled chemical combination of calcium, silicon, aluminum, iron and other ingredients. Common materials used to manufacture cement include limestone, shells, and chalk or marl combined with shale, clay, slate, blast furnace slag, silica sand, and iron ore.
What is type of cement?
Types of Cement
- Ordinary Portland Cement (OPC)
- Portland Pozzolana Cement (PPC)
- Rapid Hardening Cement.
- Quick Setting Cement.
- Low Heat Cement.
- Sulphate Resisting Cement.
- Blast Furnace Cement.
- High Alumina Cement.
What are properties of cement?
Properties of Cement- Physical & Chemical
- Fineness of cement.
- Soundness.
- Consistency.
- Strength.
- Setting time.
- Heat of hydration.
- Loss of ignition.
- Bulk density.
What is cement classification?
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.
What are the stages of cement?
What is the size of cement?
Usually, the grain size of the cement particles is within 7 ~ 200 μm (0.007 ~ 0.2 mm).
What is cement chemical formula?
Chemical composition Portland cement is made up of four main compounds: tricalcium silicate (3CaO · SiO2), dicalcium silicate (2CaO · SiO2), tricalcium aluminate (3CaO · Al2O3), and a tetra-calcium aluminoferrite (4CaO · Al2O3Fe2O3).
What are components of cement?
What is the formula for cement?
What elements are used in cement?
What is 1440 in cement?
Density of cement measured in Kg/m3 (kilograms/cubic meter) such as density is the ratio of mass to volume, so density of cement in kg/m3 is 1440, in other word, 1440 kg/m3 is density of cement. Ans. 1440 is density of cement in Kg/m3 (kilograms per cubic metre).
What is cement made of?
It is a fine, grey or white powder that is made by grinding Portland cement clinker, a limited amount of calcium sulfate which controls the set time, with other minor constituents. Portland cement is the most common type of cement in general usage in many parts of the world.
What factors affect the phase composition of cement?
The phase composition of cement The amount and form of gypsum in the cement: Whether gypsum is present in the dihydrate, hemihydrate, or the anhydrite form. Fineness of cement: Higher the fineness, higher the rate of reaction due to availability of a larger surface area.
What are the physical properties of cement?
Physical properties – It should feel smooth, and it should sink not float when throw in bucket of water. Thin paste of cement fell sticky. Presence of Lumps – Cement should be free from hard lumps. Lumps formed due to absorption of moisture.
What are the factors affecting the kinetics of hydration of cement?
The factors affecting the kinetics of hydration are: The phase composition of cement The amount and form of gypsum in the cement: Whether gypsum is present in the dihydrate, hemihydrate, or the anhydrite form. Fineness of cement: Higher the fineness, higher the rate of reaction due to availability of a larger surface area.