Identification QUIZ 3 COnsmat

Tricalcium Silicate

It is the most desirable constituent because it hardens rapidly and accounts for the high early strength of the cement.

Cement

These are materials that exhibit properties of setting and hardening when mixed to a paste with water.

Tetra calcium Alumino Ferrite

The formation of this compound reduces the clinkering temperature thereby assisting in the manufacture of Portland cement. It hydrates rather rapidly but contributes very little to strength.

Dicalcium Silicate

It hardens slowly and contributes largely to strength increases at ages beyond 1 week.

Lime

strength of the cement is weak

Lime

oldest known cementing material

Lime

It is produced by burning limestone (Calcium Carbonate) with impurities such as magnesia, silica, iron, alkalis, alumina and sulfur.

Tricalcium Aluminate

Liberates a large amount of heat during the first few days of hardening. It also contributes to early strength development. It reacts with gypsum for the retardation of setting.

Calcium Oxide

The ____________ that is formed is called "quick lime" which is when the pressure of water, reacts to form calcium hydroxide together with a great evolution of heat

Portland Cement

named by Joseph Aspdin, Portland, England

Portland Cement

a hydraulic cement produced by pulverizing clinker consisting essentially of hydraulic calcium silicates, usually containing one or more of the forms of calcium sulfate as an inter ground addition.

quick lime

The calcium oxide that is formed is called "_____________" which is when the pressure of water, reacts to form calcium hydroxide together with a great evolution of heat

quick lime

It is classified into three groups: quick, medium and slow slaking

calcium hydroxide

This process is called "slaking" and the product, _____________ is called "slaked lime" or hydrated lime.