Ordinary cement is a material that must be used in buildings. One of them is ordinary Portland cement, which is the most commonly used one. Ordinary Portland cement also has specifications, do not know if you have not understood? Below we will now go to understand the ordinary portland cement specifications and ordinary portland cement prices.
Ordinary cement
Ordinary Portland Cement Specifications
Before we understand the specifications of ordinary Portland cement, we must first understand what ordinary Portland cement is. Portland cement Portland cement clinker 5% -20% of the mixed material and the amount of gypsum ground hydraulic cementitious material, known as ordinary Portland cement, referred to as ordinary cement.
The technical requirements of the national standard for ordinary portland cement are:
1. Fineness: The sieve residue of the square-hole sieve with a sieve size of 80 μm must not exceed 10%, otherwise it is unqualified.
2. Setting time: The initial setting time should not be earlier than 45 minutes and the final setting time should not be later than 10 hours.
3, marking: according to the compressive strength and flexural strength, the Portland cement is divided into four 325,425,525,625 four labels.
Ordinary cement
Ordinary portland cement, due to its small amount of mixed materials, has the same properties as Portland cement, with slight differences. The main manifestations are:
1, early strength is slightly lower
2, slightly better corrosion resistance
3, slightly lower heat of hydration
4, good frost resistance and impermeability
5, slightly worse carbonization resistance
6, slightly worse wear resistance
In the past year, the country issued a new specification for cement: GB 175-2007 general-purpose portland cement; however, the type of cement is still the original, with some changes in specifications: P·I, P·II are Portland cement P·O common silicic acid Salt cement. Ordinary Portland cement strength specification grade is divided into 42.5, 42.5R, 52.5, 52.5R four specification grades.
Ordinary cement
Ordinary Portland Cement Price
Conch Ordinary Portland Cement Product Reference Price: RMB 305.00/t
Shandong Yimeng Ordinary Portland Cement Price: 310.00 yuan/ton
Three ordinary Portland cement P. O52.5R Price: 520.00 yuan / ton
The above information about ordinary Portland cement specifications and ordinary portland cement prices is briefly introduced here. I hope to help you. For more information, please visit this website. Stay tuned.
cement
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