QUESTION 1

a) Describe any three properties of Mortars

b) Each combination of coarse and fine aggregates has a specific water demand for a given mix fluidity or slump. What are the two general guidelines?

c) Explain what are Polymer Concretes?

QUESTION 2

a) Comment on the Effects of Hygroscopic Properties of Wood

b) Give a brief description of the following terms-

• Ductility
• Residual Stresses
• Strain Rate
• Toughness

c) From the standpoint of building and their principal effects, explain the importance of the following alloying elements

• Aluminium
• Copper
• Titanium