Want this question answered?
sulphate resisting cement. Mainly applied for concrete in waste water facilities.
Portland cement is made of,CaoSiO2Al2O3Fe2O3MgOAlkaliesSO3
Ordinary Portland cement is suitable. As per IRC 21, Portland Pozzolana Cement is limited for Plain Concrete only.
Ordinary Portland Cement, also known as OPC, is a type I cement that does not only harden, but also becomes water-resistant once it cures. Pozzolanic Portland Cement, or PPC, is a type IV cement that includes a mixture of a pozzuolanic material, which can increase the strength of the concrete and reduce the amount of OPC used.
OPC - Ordinary Portland cementOPC - Materials used - Argillaceous and calcareous materialsPPC - Portland Pozzolona CementPPC - OPC + Pozzolonoc materials(fly ash, volcanic ash, pumicite at the time of grinding).
The sulphate resistant cement is made with low C3A content is found to be effective.Such cement with low C3A and comparitively low C4AF content is known as sulphate resisting cement.This cement has a high silicate content.The specification generally limits the C3A content to 5 percent.
the limit concentration of sulphate is 1000 ppm after that "sulphate resistant cement" should be used
sulphate resisting cement. Mainly applied for concrete in waste water facilities.
sulphate resistant cement
Kinds of portland cement:Type - 1 - Ordinary portland cementType - 2 - Portland pozzolana cementType - 3 - Rapid hardening cementType - 4 - Low heat cementType - 5 - Sulphate resisting cement.
Advantages of using sulphate resisting cement,It is used in marine constructionUsed in foundations and basements where soil is infested with sulphates.Concrete to be used in construction of sewage treatment works.Used in fabrication of pipes which are likely to be buried in sulphate bearing soil.
Type-I - Ordinary portland cement used in general constructionType-II - Portland pozzolana cement , moderate heat of hydrationType- III - Rapid hardening cement used for quick setting worksType-IV - low heat cement, low heat of hydrationType-V - Sulphate resisting cement used in sewage linings,marine construction.
The portland cement is used in general construction.The type-II cement is used in general concrete construction exposed to moderate sulphate action. i.e.,Concrete to be used in marine conditions.Concrete to be used in the construction of sewage treatment works.
Because this cements this cements water absorps maximum.
The various types of ordinary portland cement are,Ordinary portland cement 33 gradeOrdinary portland cement 43 gradeOrdinary portland cement 53 grade
I assume you are contrasting portland cement with fly ash to portland cement with powdered slag? (Fly ash is from coal furnaces, powdered slag is from oil-burning furnaces). Slag is very similar to portland cement, and can be used to cheaply replace up to 50% of portland cement in concrete. This is less expensive, and the slag makes the hardened concrete more resistant to de-icers. Fly ash is not similar to portland cement, but is also good to resist de-icers. But since fly ash is not similar to portland cement, only 20 to 30% of portland cement can be replaced by it. The main difference in chemistry are the amounts of oxygen-containing elements. (Called 'oxides'). For example, portland cement has 65% of C2O, Slag cement has 45%, and Fly ash contains 25% For SiO2 portland cement 20%, Slag cement 33%, and Fly ash 37% For Al2O3 portland cement 4%, Slag cement 10%, Fly ash 16%. There are other very minor differences in chemistry.
According to the Portland Cement Association, portland cement should not be capitalized.