MIX DESIGN OF CONCRETE

The (a)   compressive strength required from structural consideration.

The adequate workability necessary for (a)   compaction with the compacting equipment available.

What is the approx. mix proportion for M10

• 1:3:6

• 1:2:4

• 1:1.5:3

• 1:1:2

What is the approx. mix proportion for M25

• 1:3:6

• 1:2:4

• 1:1.5:3

• 1:1:2

A lower ratio leads to

• Higher strength but low durability

• Higher strength and durability

• Lower strength but high durability

• Lower strength and durability

Workability can be resolved

• With not using of plasticizers

• With use of plasticizers

• With the use of both plasticizers and super plasticizers

• With not using of both plasticizers and super plasticizers

This image has

• High w/c ratio

• Low w/c ratio

• High Strength

• Low porosity

What is the compaction factor for low degree of workability

• .78

• .85

• .92

• .95