Podcast
Questions and Answers
What is the minimum strength required for basement floors?
What is the minimum strength required for basement floors?
- 15 MPa
- 25 MPa
- 20 MPa (correct)
- 32 MPa
Why is air entrainment required for exterior concrete applications?
Why is air entrainment required for exterior concrete applications?
- To make the concrete more expensive
- To increase the concrete's strength
- To change the color of the concrete
- To reduce degradation caused by de-icing salts and freezing temperatures (correct)
What is the purpose of using cement types 20, 40, 50 or equivalent in certain areas?
What is the purpose of using cement types 20, 40, 50 or equivalent in certain areas?
- To increase the strength of the concrete
- To reduce the cost of the concrete
- To change the color of the concrete
- To protect the concrete from sulphate attack (correct)
Why should additional water not be added to the concrete at the construction site?
Why should additional water not be added to the concrete at the construction site?
What should be avoided in the aggregates used in concrete manufacturing?
What should be avoided in the aggregates used in concrete manufacturing?
What is the range of air entrainment required for exterior concrete applications?
What is the range of air entrainment required for exterior concrete applications?
What is the purpose of adding a plasticizer or other concrete admixture to the mix?
What is the purpose of adding a plasticizer or other concrete admixture to the mix?
What is the primary purpose of performing a slump test on site-batched concrete?
What is the primary purpose of performing a slump test on site-batched concrete?
What is the advantage of using ready-mix concrete?
What is the advantage of using ready-mix concrete?
Why is it important to use clean and well-graded aggregates in concrete mixing?
Why is it important to use clean and well-graded aggregates in concrete mixing?
What is the recommended water-cement ratio for site-mixed concrete for garage and carport floors?
What is the recommended water-cement ratio for site-mixed concrete for garage and carport floors?
What is the importance of following the manufacturer's instructions when using premixed bags of cement and aggregate?
What is the importance of following the manufacturer's instructions when using premixed bags of cement and aggregate?
