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Quick Details
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Application:
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School
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Design Style:
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Industrial
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Place of Origin:
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South Africa
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Brand Name:
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Imme
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Model Number:
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988473
Quick Details
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Warranty:
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Lifetime
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After-sale Service:
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Online technical support, Onsite Installation, Onsite Training, Onsite Inspection, Free spare parts, Return and Replacement, Other
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Project Solution Capability:
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graphic design, 3D model design, total solution for projects, Cross Categories Consolidation, NONE, Others
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Application:
-
School
-
Design Style:
-
Industrial
-
Place of Origin:
-
South Africa
-
Brand Name:
-
Imme
-
Model Number:
-
988473
Grey and White Portland Cement, Ordinary Portland cement Type 1, Type 2, and Type 5.
We are dealing with reputed cement factories in the Middle East and the Far East area as long term direct contracts. There are three types of ordinary Portland cement (Grey) available. If you need any special analysis for Grey Portland Cement, you may send us details to checking for availability and production planning.
What Is Portland Cement?
Portland cement is a type of concrete that can be used to make a variety of products and materials. It is a mixture of limestone, clay, and other materials that undergoes a chemical reaction when combined. The cement is then used as a binder when combined with aggregate materials like sand or gravel to make concrete.
Moreover, Portland cement is known as the “universal cement” because it can be used in numerous applications. It is most commonly used as a binder in concrete, but it can also be found in road pavement, roofing materials, cement boards, stucco, grout, and other construction products.
History of Portland Cement
As far back as the first century, people have been using cements to create concrete. A basic lime-based concrete was used by ancient Romans, and other civilizations also used similar cements. The modern Portland cement we use today is a refined version of these cements.
In the mid-19th century, a British chemist named Joseph Aspdin invented a new type of cement that he called “Portland cement.” The cement uses limestone, clay, and iron as main ingredients, which are heated and then ground together in rotary kilns.
The Portland cement was more reliable and consistent than other cements, making it a more popular choice for building materials. It would go on to become the standard for how cements are made today.
Composition of Portland Cement
Portland cement is composed of limestone, clay, iron, and silica. You’ll find that each batch of cement will have unique percentages of these ingredients, but they will always be present.
Cement is made with a raw material called clinker, which is heated to high temperatures in a rotary kiln. The clinker is then ground into small chunks, known as “fine cement,” which is mixed with water and other ingredients to create the end product. Portland cement is the most common type of cement in the world.
Types of Portland Cement
Portland cement is available in several different varieties, which each have its own range of uses. These include Type I, Type IA, Type II, Type III, and Type IV Cement. Each type of cement has unique properties that allow it to be used in a variety of applications.
Type I Portland Cement is the most commonly used type of cement and is well-suited to general construction projects, including sidewalks, driveways, patios, and foundations. It is also the preferred choice for many precast concrete products as it sets quickly and has a low heat of hydration that reduces cracking in the finished product.
Type IA Portland Cement is very similar to Type I, but with an increased ability to resist sulfate attack. This makes it ideal for projects where exposure to sulfates is a concern, such as foundations near bodies of water or in areas with high levels of sulfur in the soil.
Type II Portland Cement is designed to be resistant to chemical attack and has a higher rate of heat evolution than Type I Cement, making it suitable for high-temperature applications such as mass concrete pours.
Type III Portland Cement is fast-setting and is used in projects that require a very rapid rate of strength development. It has a higher rate of heat evolution than Types I and II and should therefore be used with caution when pouring large amounts of concrete.
Type IV Portland Cement has an even faster rate of strength development than Type III and is ideal for applications that require a very rapid set-up, such as precast concrete pieces. It also has a lower heat of hydration, making it less likely to crack when exposed to extreme temperatures.
Uses of Portland Cement
Portland cement can be used in a variety of construction projects. Some of the most common uses include concrete, road pavement, stucco, and grout.
Concrete: Portland cement is the primary ingredient in concrete, making it an essential construction material. It is often used in building sidewalks and foundations, as well as in creating concrete blocks.
Road Pavement: The surface of roads is usually made with asphalt, but Portland cement can also be used in place of asphalt. It is a great option for heavy traffic areas, as it can withstand the weight of many cars.
Stucco: Stucco is a plaster-like substance used for exterior walls and ceilings. It can be made with Portland cement or a combination of Portland cement and lime.
Grout: Grout is a substance used to fill in gaps or cracks in construction materials. It is often used in tile installation and other construction projects.
The cement manufacturing process is given here in detail: manufacturing of cement.
Types of cement :
Followings are the 19 types of cement:
Ordinary Portland cement
Portland pozzolana cement
Rapid hardening Portland cement
Extra rapid hardening cement
Portland slag cement
Hydrophobic Portland cement
Low heat Portland cement
Sulphate resisting Portland cement
Quick setting Cement
High alumina cement,
Supersulphated cement
Masonry cement
Oil well cement
White Portland cement
Colored cement
Water-proof cement
Expansive cement
Sand cement, and
Air-entraining Portland cement.In this list, 9 to 19 are special-purpose cement.
Portland Cement Type 1
ASTM C150-50 Standard
Standard: ASTM C150-05,
Type 1,
Packing: 50 kg PP Bag, 1.500 Kg Jumbo
Status: Fresh and high-quality
Delivery: FOB, and CIF
The vessel is ready in the port of loading for monthly shipping to any destination port.
Portland Cement Type 2
ASTM C-150 Standard
Standard: ASTM C150-05,
Type 2,
Packing: 50 kg PP Bag, 1.500 Kg Jumbo
Status: Fresh and high-quality
Delivery: FOB, and CIF
The vessel is ready in the port of loading for monthly shipping to any destination port.
Portland Cement Type 5
ASTM C-150 Standard
Standard: ASTM C150-05,
Type 5,
Packing: 50 kg PP Bag, 1.500 Kg Jumbo
Status: Fresh and high-quality
Delivery: FOB, and CIF
The vessel is ready in the port of loading for monthly shipping to any destination port.
White Portland Cement
Product
White Portland Cement
Standard: EN 197-1, 52.5
Packing: 50 Kg PP Bag/ 1,500 Kg Jumbo Ba
Gray Cement
In general ‘Cement’ means Gray Ordinary Portland Cement which is used for general purposes in construction. The cement is one of the most important raw materials used in building as the strength of any construction work depends on the quality cement. The gray cement should be factory-manufactured from a reputed manufacturer. It must not be from local plant manufacturer. It is properly packed from factory, not be hand packed locally. While taking supply of gray cement, manufacturing date, grade and type should be checked. The cement should not be more than six weeks old from the date of manufacturing.
Types of gray cement
According to chemical properties gray cement can be classified as follows.
- Ordinary Portland cement (for general use)
- Rapid-hardening Portland cement (where high early strength is required)
- Low heat Portland cement (in mass concrete for dam etc.)
Manufacturing of gray cement
All types of cement like Ordinary Portland Cement, Rapid-hardening Portland cement or Low heat Portland cement are manufactured by intimately mixing Calcareous, Argillaceous and Silica, Alumina or Iron Oxide bearing materials, which are burnt at clinkering temperature and are ground to produce gray cement, complying with specifications. No material except Gypsum or Water or both should be added after burning.
Specifications of gray cement
Fineness
There are following two methods to check fineness of Portland cement.
- Method 1: After sieving, the cement on IS test Sieve No.9 (B.S. Sieve No 170) should not exceed 10% in case of Ordinary Portland Cement.
- Method 2: Specific surface by Air Permeability Method should not be less than 2150 sq. cm/ kg in case of Ordinary Portland Cement
Soundness
Alternatively autoclave expansion should not be more than 0.5% when tested according to IS 269 of 1989.
Setting time
Setting time of any type or any grade of cement when tested by Vicat apparatus method described in IS: 4031 should confirm following requirement.
- Initial setting time Not less than 30 minutes
- Final setting time: Not more than 600 minutes i.e. 10 hours
Compressive Strength
After 28 days compressive strength of cement concrete mix for various types of cement concrete mix is following.
Compressive strength of cement concrete mix
| S. NO. | Type of Mix | Ratio of Mix | Compressive strength |
| 1. | M 10 | 1:3:6 | 100 kg. Per cm square |
| 2. | M 15 | 1:2:4 | 150 kg. Per cm square |
| 3. | M 20 | 1:1.5:3 | 200 kg. Per cm square |
Note: Cement concrete cubes filled in above mentioned cement ratios should be tested after curing for 7 days and the strength of cement concrete should not be less than 70%.
General guidelines for gray cement
Cement is the most important raw material used in construction of a building. You can ensure the quality of ‘Cement’ with following guidelines.- Cement bag bears date of manufacturing
- One cement bag has 50 Kg. weights
- Cement bags are not hand stitched
- Consignment must have identification mark on the package
- Cement is packed in bags of synthetic jute or polypropylene bags
- Factory manufactured instead of plant manufactured
- Bears manufacturer's name or his trade mark , grade and type of cement
- Not older than six weeks from the date of manufacturing
- Not partially set due to moisture or have small lumps in bags
- Not pressed or have lumps due to high pressure of stack, having more than 10 to 12 bags
- The bags are not torn by side and stitched in later
Precautions while transporting cement
- Carry bags in clean vehicle which is not dustier or on earth etc. as it reduces the strength of cement.
- Take cement bags under covered Polythene or ‘Tarpaulin’ during monsoon season.
- Labor should not tear bags while loading and unloading cement bags.
Precautions while stacking/storing gray cement
- Store cement in moist proof area otherwise quality of cement will be affected
- Stack cement bags in dry, leak proof and moisture proof shed/fumes
- Place cement bags on dry brick floors, wooden crates or planks
- Don’t place cement bags on the earth in any case
- Don’t make stack of bags higher than 10 bags to avoid lumps under pressure
- Don’t stack up cement bags with outer walls to protect it from dampness
- Pile up cement bags from different manufacturer separately
- Make use of cement on first come first serve basis
- Cover cement bags with polythene during monsoon season
- Keep cement bags close to each other to reduce air circulation
Caution for storage/stacking
- When construction work is assigned to a contractor, make sure he takes proper care of cement. Many times contractors do not take care for proper storage of cement at site as it costs them labor and money. This results in reduction in strength of cement as shown in the table below.
- In some cases, it is observed that after laying RCC slab on some parts of building, the contractor dismantles his temporary store at site and places cement bags on ground floor of building which is under construction. It is not good as cement bags may draw moisture from floor and walls of new building and results in reduction of strength in cement because new building is wet due to construction work in progress.
Reduction in cement strength due to storage
| S. No | Storage Period | Reduction in Strength |
| 1. | Fresh cement | Nil |
| 2. | Three months old | 20% |
| 3. | Six months old | 30% |
| 4. | 12 Months old | 40% |
| 5. | 24 Months old | 50% |
Caution for cement strength
- Cement retards in hardening and reduces strength due to absorption of moisture during storage.
- It is okay for cement to absorb up to 1.2% moisture as this level of moisture is acceptable but if absorption exceeds 5%, the cement is destroyed for all practical purposes.
- Different types of cements should not be mixed while using them for constructional purposes.
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