DELETERIOUS MATERIALS

Question 1

What are deleterious materials?

Answer 1

Materials known to deteriorate or fail structurally over time, posing risks.

Question 2

What is RAAC?

Answer 2

• Reinforced Autoclaved Aerated Concrete used from 1960s–1990s.
• Known to deteriorate and compromise structural integrity.

Question 3

What is high‑alumina cement?

Answer 3

• A cement type prone to structural failure due to chemical changes.

Question 4

What clues indicate deleterious materials?

Answer 4

• Brown staining on concrete and structures from 1960s–70s.

Question 5

What is calcium chloride used for?

Answer 5

An additive in concrete linked to corrosion and deterioration.