Construction Technology: Permeability and Factors

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What do functional properties of building materials describe?

Only the mechanical properties

Chemical properties exclusively

Just the physical properties

The set of properties concerning the material’s usefulness (correct)

What is the main focus of physical properties of a material?

External appearance of the material

Biological aspects of the material

Interaction with other materials

Unique characteristics of the material (correct)

Which of the following is NOT an example of a physical property of building materials?

Density and porosity

Response to water and vapor

Chemical reactivity (correct)

Response to heat, fire, and cold

In what context are building materials exposed to different factors simultaneously?

When they are in use Signup and view all the answers

Which category do properties related to water absorption and permeability fall under?

Physical properties Signup and view all the answers

What do functional properties include along with physical properties?

Purpose-related properties Signup and view all the answers

How is permeability defined?

Amount of liquid or gas passing through a unit area under specified pressure difference Signup and view all the answers

What factors contribute to an increase in permeability?

Increasing pressure differential Signup and view all the answers

How can the permeability of walls be reduced?

Increasing thickness of the material Signup and view all the answers

What does the speed of water flowing through a material depend on?

Diameter of the capillaries Signup and view all the answers

What makes a material more impermeable?

Small diameter capillaries Signup and view all the answers

What aspect affects the permeability to water of a material under pressure?

Number of pores in the material Signup and view all the answers

What do mechanical properties of a material describe?

The material's ability to resist deformation under external forces Signup and view all the answers

Which of the following is considered a chemical property of a material?

Biological resistance Signup and view all the answers

What do physical properties of a material indicate?

Properties that become apparent when the material is being manufactured or processed Signup and view all the answers

Which property is NOT included in mechanical properties?

Corrosion resistance Signup and view all the answers

What does the term 'chemical/biological properties' refer to?

Material's ability to withstand environmental attacks like acids and insects Signup and view all the answers

Which property is NOT an example of physical properties?

Corrosion resistance Signup and view all the answers

What is shrinkage in construction materials?

A decrease in size due to certain processes like variations in moisture content Signup and view all the answers

What are the ingredients of fine-grained concrete with high strength steel?

Steel bars hidden in concrete Signup and view all the answers

Which material is weak in tension but strong in compression?

Cement Signup and view all the answers

What are some applications of the material made of cement, water, and small stones?

Early arch bridges and domes Signup and view all the answers

Which material has the strength to mold into any shape and is fireproof and weatherproof?

Fine-grained concrete with high strength steel Signup and view all the answers

What is a common weakness of fine-grained concrete with high-strength steel?

Cracks as it cools and hardens Signup and view all the answers

What are the three main ways materials may respond when exposed to fire?

Chemical decomposition, melting, considerable deformation Signup and view all the answers

How is fire-resistance rating defined?

Time of exposure to fire before strength loss Signup and view all the answers

Construction Technology: Permeability and Factors

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