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Questions and Answers
What material is formed by polyester fibers and liquid resin?
What material is formed by polyester fibers and liquid resin?
- Glass
- Wood
- Crystal
- Composite material (correct)
Which characteristic is true about the material mentioned?
Which characteristic is true about the material mentioned?
- It is environment-friendly (correct)
- It is made from natural fibers
- It requires frequent maintenance
- It has a short lifespan
Why might this material be preferred in sustainable practices?
Why might this material be preferred in sustainable practices?
- It has a long lifespan and is environment-friendly (correct)
- It is non-biodegradable
- It is made from synthetic materials
- It has a high energy consumption during production
What is a potential drawback of using this material?
What is a potential drawback of using this material?
What type of fibers is the material composed of?
What type of fibers is the material composed of?
What is a primary characteristic of epoxy as a polymeric material?
What is a primary characteristic of epoxy as a polymeric material?
Which of the following materials is commonly associated with waterproofing insulation?
Which of the following materials is commonly associated with waterproofing insulation?
In what primary application is epoxy commonly used?
In what primary application is epoxy commonly used?
What is NOT a characteristic of epoxy mentioned in the content?
What is NOT a characteristic of epoxy mentioned in the content?
Which property distinguishes marble and granite as insulation materials?
Which property distinguishes marble and granite as insulation materials?
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Study Notes
Polyester Fibers Material
- Composed of polyester fibers submerged in a liquid resin.
- Long-life and environmentally friendly material.
Epoxy
- A polymeric material that is sticky and has rapid solidification.
- Used to process holes and cracks.
Water Proofing Insulation
- Rocks such as marble and granite are used for waterproofing.
Building Units From Bricks
- Good compressive strength is required for wall bearing.
- Chemical stability is needed for external façades in industrial areas.
- Desert areas require bricks with a minimum coefficient of thermal expansion and low heat conductivity.
- High abrasion resistance is essential for construction of stairs and pavements.
Factors Affecting the Strength of Masonry or Stone Walls
- The type of unit used.
- The strength of the unit.
- The type of mortar used.
- The method of construction.
Timber
- A natural and renewable product derived from trees.
Properties of Timber
- Specific gravity depends on cell size, cell wall thickness, and number and types of cells.
- The dry density of wood ranges from 160 kg/m3 to 1000 kg/m3.
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