Chapter 4Chapter 4

Ordinary ConcreteOrdinary Concrete

§4.2 Ingredient of Ordinary Concrete

• 4.2.1 Cement4.2.1 Cement

• 4.2.2 Aggregate

• 4.2.3 Water

• 4.2.4 Concrete Admixture

Sketch Map of ConcreteSketch Map of Concrete

Concrete is made up of Paste

Cement Water

Aggregate SandGravel

Admixture

Ingredients of Ordinary ConcreteIngredients of Ordinary Concrete

Select cement types according to the different environment

Six general cements are commonly used.

Types of CementTypes of CementTypes of CementTypes of Cement

Selection of TypesSelection of Types

4.2.1 Cement4.2.1 Cement

Selection of GradeSelection of Grade

GradeGrade must be selected according to the different design strength grades.

For ordinary concrete, it is 1.5-2 times stronger than that of the concrete.

For high strength concrete, it is 0.9-1.5 times stronger than that of the concrete.

Cement- GradeCement- GradeCement- GradeCement- Grade