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What to Ask When Considering Using Shrinkage Reducing Agents

Shrinkage reducers control drying shrinkage and minimize cracking. Terry Holland in his recent article in Concrete Construction, "Using shrinkage-reducing admixtures" suggests asking manufacturers the following:

What are the effects on fresh concrete?
What are the effects on hardened concrete?
What is the effect on durability?
Is there any information on how have similar structures behaved in service?
Is the same cement going to be used as in the test specimens or comparison project?
What is the impact on cost?

Before using a shrinkage reducing agent, ask the manufacturer how it will affect your project and materials.

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