Chp 5

Question 1

What is Stripping?

Answer 1

It is the separation of asphalt film from aggregate which reduces the durability of the asphalt.

Question 2

What are the types of deletorius aggregate materials and what are the adverse effects of each?

Answer 2

There are 5 types:
- Organic Impurities : they day the setting time and hardening
- Clay
- Filler
- Coal: reduce durability and wear resistance.
- Soft Particles: reduce durability and wear resistance.

Question 3

List some Aggregate sustainability considerations.

Answer 3

• The reclamation of aggregate bearing products.
• Specifying the use of either primary or secondary recycled materials.
• Stats have codes for development, closure and reclamation of aggregate quarries.