Asbestos – properties and typical uses in building materials Which statement best describes asbestos as used in construction products?

Difficulty: Easy

Correct Answer: An incombustible, fire-resistant material

Explanation:


Introduction:
Asbestos is a naturally occurring fibrous silicate mineral historically used in building materials for its heat resistance and durability. The question tests recognition of its core material property, not just a product form or a misconception about its insulation behavior.


Given Data / Assumptions:

  • We assess material nature (mineral vs organic).
  • We focus on general physical properties relevant to buildings.
  • Health hazards are acknowledged historically but are not the focus of the item.


Concept / Approach:

Asbestos fibers are incombustible and withstand high temperatures, which historically made them valuable for fireproofing and heat-insulating applications (e.g., asbestos-cement sheets, insulation lagging). They are mineral (inorganic) fibers, not organic compounds, and they are reasonably good insulators of heat and sound.


Step-by-Step Solution:

1) Identify the fundamental material nature: asbestos is an inorganic silicate mineral.2) Core property: incombustibility and resistance to high temperature define its fireproofing role.3) Derived applications: asbestos-cement roofing, fire-resisting boards, and insulation products historically leveraged these properties.


Verification / Alternative check:

Comparing typical thermal and acoustic properties with common building materials confirms asbestos is not a poor insulator; it was used precisely because it resists heat and provides insulation (not recommended today due to health risks).


Why Other Options Are Wrong:

Corrugated sheet used for roofing: That is a product form (asbestos-cement sheet), not the defining description of asbestos itself.
An organic substance: Incorrect; asbestos is an inorganic mineral fiber.
A bad insulator: False; it is a good insulator and valued for heat resistance.


Common Pitfalls:

Confusing a product (sheet) with the base material; believing it is organic; assuming poor insulation. The key property is incombustibility and high-temperature resistance.


Final Answer:

An incombustible, fire-resistant material

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