What are the parameters of cement?

Our study consisted of studying the key parameters that determine the quality of a target cement. We have six parameters which are the content of insoluble residues in heat loss, sulfur oxide to magnesium oxide, calcium oxide and alkali oxides.

What are the parameters to be considered while designing a concrete?

The formation of concrete mix design requires following parameters to be considered:

• Ultimate design strength of concrete.
• Early age strength requirement for demoulding, lifting and movement to store.
• Workability, consistency, and finishability.
• Degree and type of reinforcement.
• Size and shape of mould and element.

What is silica cement ratio?

The Silica Ratio (also known as the Silica Modulus) is defined as: SR = SiO2/(Al2O3 + Fe2O3) A high silica ratio means that more calcium silicates are present in the clinker and less aluminate and ferrite. SR is typically between 2.0 and 3.0.

What is the strength of cement?

For ordinary Portland cement (OPC), compressive strength is ranging between 33 – 53MPa at 28 days, 22- 27 MPa at 7days and 16 -27MPa at 3days of curing after casting. For Portland Pozzolana cement (PPC), compressive strength is 33MPa at 28 days,22MPa at 7days and 16MPa at 3days of curing after casting.

What are the factors that affect the strength of concrete?

Factors Affecting Strength of Concrete

• Quality of Raw Materials.
• Water / Cement Ratio.
• Coarse / fine aggregate ratio.
• Aggregate / Cement Ratio.
• Age of concrete.
• Compaction of concrete.
• Temperature.
• Relative humidity.

How is concrete durable?

Concrete will remain durable if: The cement paste structure is dense and of low permeability. Under extreme condition, it has entrained air to resist freeze-thaw cycle. It is made with graded aggregate that are strong and inert.