Concrete and Aggregates: Key Concepts

Front

What are the major components of concrete?

Back

Paste (Binder) and Aggregates (Filler)

Front

What is the impact of the water-cement ratio on concrete quality?

Back

It affects hydration and the overall strength of the concrete.

Front

What happens to the maximum allowable water-cement ratio as specified compressive strength increases?

Back

The maximum allowable water-cement ratio decreases.

Front

What is the allowable slump for reinforced walls in concrete construction?

Back

4.0 inches maximum and 1.0 inch minimum.

Front

What are the two types of aggregates in concrete?

Back

Coarse Aggregate and Fine Aggregate.

Front

What are examples of coarse aggregates?

Back

Gravel, Crushed Stone.

Front

What is the effect of segregation in wet mixes?

Back

It produces honeycombing in concrete, compromising strength.

Front

What are undesirable aggregate shapes?

Back

Flaky Aggregate and Elongated Aggregate.

Front

What are desirable aggregate shapes?

Back

Rounded Aggregates, Irregular or Partly Rounded Aggregates, Angular or Cubic Aggregates.

Front

What do ASTM specifications ensure in concrete mix design?

Back

They guarantee the quality of materials (aggregates) and the concrete itself.