Overview
Question 1:
What is the effect of water-cement ratio on the permeability of hardened concrete? How does permeability affect the durability of the concrete structure?
Question 2:
What does the term “curing concrete” mean? What will happen if concrete is not cured adequately?
Question 3:
Discuss five different methods of concrete curing.
Question 4:
Why is extra water harmful to fresh concrete but good for concrete after it reaches its final set?
Question 5:
Discuss the change in volume of concrete at early ages.
Question 6:
Discuss three different types of ready-mixed concrete.
Question 7:
What is consolidation of concrete? Describe different methods for consolidating concrete for small and large jobs.
Question 8:
Describe five tests of hardened concrete.
Question 9:
On a graph, draw a sketch showing the typical relationship between the stress and strain of concrete specimen with high and low water-cement ratios. Label axes and curves. Comment on the effect of increasing the water-cement ratio on the stress-strain response.
Question 10:
Discuss two nondestructive tests to be performed on hardened concrete. Show the basic principles behind the tests and how they are performed.