Preparation of concrete should include adding the correct proportions of water, portland cement, and aggregate, by volume or by weight, using a concrete mixer, mortar box, or wheelbarrow.
Process/Skill Questions:
- What are the safety precautions and procedures to follow when using a concrete mixer?
- What are the ingredients in a concrete mix? How are they batched and mixed?
- What is proportion of materials in a given concrete mix?
- What are the characteristics of properly mixed concrete?
- What is the procedure for hand-mixing concrete in a mortar box?
- What are the similarities and differences between using a mortar box and an electric mixer?
- What is the importance of mixing concrete?
- Why and how should water be measured when mixing concrete?