Chapter 4: Admixtures

Traps bubbles in the mortar mix.

Increases resistance to freezing and thawing cycles.

• Air-entraining agents

• Bond Modifiers

• Retarders

• Accelerators

Reduces setting time by 30%-40%

increases 24-hour strength by 150% or more

will not prevent freezing

• Accelerators

• Bond Modifiers

• Water Repellents

• Air-entraining agents

Extends the setting time of mortar

Extends the mortar's board life so tempering isn't needed

used for hot weather construction

• Retarders

• Corrosion inhibitors

• Proprietary Plasticizers

• Bond modifiers

Improves adhesion

Increases surface density

Used for structures with glass blocks or glazed brick

• Bond modifiers

• Retarders

• Water Repellents

• Corrosion inhibitors

Prevents the corrosion of steel

Structures built in Marine environments

Use only in mortar that contacts embedded steel

• Air-entraining agents

• Corrosion inhibitors

• Water Repellents

• Proprietary Plasticizers

Reduces water absorption of hardened mortar up to 60%

does not effect design strength

For the basement of a house and foundations that are underground

• Corrosion Inhibitors

• Proprietary Plasticizers

• Water Repellents

• Bond Modifiers

Makes mortar more workable

Increases compressive and bond strength

Reduces Efflorescence

Structures built in hot weather conditions

• Bond Modifiers

• Retarders

• Accelerators

• Proprietary Plasticizers