How can you tell if cement is OPC or PPC?
Table of Contents
How can you tell if cement is OPC or PPC?
Look for OPC 43 grade cement or 53 grade cement, if available. If available, look for IS 269 mark on the bags along with grade of cement clearly mentioned on it. If OPC 43 grade or 53 Grade cement is not available, go ahead for buying PPC cement. In that case, look for IS 1489 Part I mark on the bags.
How can you tell 43 and 53 grade cement?
Codes for cement grades: Earlier, there used to be three IS codes for different grades of OPC. For OPC 33 grade, the IS code was IS 269 and cement bags were marked with IS 269 mark. For 43 grade OPC, the IS code was IS 8112. For 53 grade cement, IS code used to be IS 12269.
How will you determine the grade of OPC?
Ordinary Portland Cement (OPC) is graded according to their compressive strength. The grade indicates the minimum compression strength (MPa or N/mm2) that the cement will attain after 28 days of setting. OPC 43 grade cement is a cheaper choice over OPC 53 grade cement.
What is the meaning of OPC 43 grade cement?
OPC 43 means that the cement is expected to reach a compressive strength of 43 MPa in a cube cast by 28 days. Similarly, OPC 53 reaches 53 MPa by 28 days. There is a contrasting difference in the setting times of these cements.
How can you tell PPC cement?
Particular IS code number should be printed on the cement bag. i.e. if you have ordered OPC 53 grade cement, then “IS-12269-1987” should be printed on the cement bag; and if you have ordered Portland Pozzolana Cement (PPC), “IS 1489 – 1 -1991″ & “IS 1489 – 2 -1991” should be printed on the cement bags.
What is the basic difference between OPC and PPC?
The main differences in their characteristics and uses are –
| OPC | PPC |
|---|---|
| The presence of sulphates, alkalies, chlorides, etc. is higher and less resistant than PPC. | It has low percentage of sulphate alkalis, chlorides, magnesia and free lime in its composition, which makes the concrete durable. |
How many grades are there in OPC cement?
Bureau of Indian Standards (BIS) has classified OPC into 3 different grades namely, OPC 33 Grade, OPC 43 Grade and OPC 53 Grade cements.
How many grades are there in OPC?
OPC: OPC is by far the most common cement used in India. Depending upon the 28 days strength of the cement mortar cubes, as per IS 4031-1988, OPC is classified into three grades, namely 33, 43, and 53 grades.
Which is the best OPC cement in India?
Best opc 53 grade cement in india
- UltraTech Cement.
- ACC Cement.
- Ambuja Cement.
- Shree Cement.
- Ramco Cement.
What is fly ash cement?
Fly ash is a pozzolan, a substance containing aluminous and siliceous material that forms cement in the presence of water. When mixed with lime and water, fly ash forms a compound similar to Portland cement.
What is the difference between OPC 43 and OPC 53 grade cement?
Thus, the OPC 43 grade cement should attain the compression strength of 43MPa within 28 days of setting. And similarly he OPC 53 grade cement should attain the compression strength of 53MPa within 28 days of setting.
Can We mix fly ash with 53 grade cement?
A 53 Grade cement gives up to 70 MPa strength against a minimum 53 MPa specified by BIS. So, We can also mix fly ash (at least 20\% by weight of cement) in concrete as part replacement of cement at site. This is not only to save on material cost of concrete but also to achieve durable properties due to pore refinement (Less porous concrete).
What is the compressive strength of 43 grade cement?
We can determine by compressive strength of 1:3 cement sand mortar cubes after 3 days, 7 days & 28 days. The 28 days strength will be minimum 43N/mm2 for 43 grade cement and 53N/mm2 for 53 grade cement.
What is the grade of ordinary portland cement?
Ordinary Portland cement 43 Grade & 53 Grade. OPC is manufactured by grinding together OPC Clinker (95–97\%) along with gypsum (3–5\%). Ordinary Portland Cement (OPC) is graded according to their compressive strength. The grade indicates the minimum compression strength (MPa or N/mm2) that the cement will attain after 28 days of setting.