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Questions and Answers
Which of the following ingredients is responsible for making clay plastic?
Which of the following ingredients is responsible for making clay plastic?
The thickness of mortar used in brick laying is typically between 6.5mm and 9mm.
The thickness of mortar used in brick laying is typically between 6.5mm and 9mm.
True
What is the purpose of plastering after brick laying?
What is the purpose of plastering after brick laying?
To obtain a smooth surface, good appearance, finishing to brick joints, and uniformity in color.
The standard size of a brick used in brick laying is generally ____ mm.
The standard size of a brick used in brick laying is generally ____ mm.
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Match the properties of a good quality brick with their descriptions:
Match the properties of a good quality brick with their descriptions:
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What is the primary function of silica in brick making?
What is the primary function of silica in brick making?
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The required uniformity of color in bricks indicates thoroughness in the burning process.
The required uniformity of color in bricks indicates thoroughness in the burning process.
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What minimizes warping in brick production?
What minimizes warping in brick production?
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What is the maximum permissible water absorption for first class bricks?
What is the maximum permissible water absorption for first class bricks?
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Second class bricks can have minor cracks and distortions.
Second class bricks can have minor cracks and distortions.
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What is the maximum allowable water absorption for bricks when immersed in water for 24 hours?
What is the maximum allowable water absorption for bricks when immersed in water for 24 hours?
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The crushing strength of a brick should be at least 10 N/mm².
The crushing strength of a brick should be at least 10 N/mm².
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What is the minimum crushing strength required for third class bricks?
What is the minimum crushing strength required for third class bricks?
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Fourth class bricks are often used for ________ and floors in lime concrete.
Fourth class bricks are often used for ________ and floors in lime concrete.
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What color characteristics define a first class brick?
What color characteristics define a first class brick?
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Match the following classes of bricks with their characteristics:
Match the following classes of bricks with their characteristics:
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The material used for making bricks should be free from ______ and organic matter.
The material used for making bricks should be free from ______ and organic matter.
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Which type of brick is primarily made for aesthetic purposes?
Which type of brick is primarily made for aesthetic purposes?
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Match the following classes of bricks with their characteristics:
Match the following classes of bricks with their characteristics:
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Engineering bricks are weak and water permeable.
Engineering bricks are weak and water permeable.
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What type of sound should bricks produce when struck together?
What type of sound should bricks produce when struck together?
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Perforated bricks are classified as first class bricks.
Perforated bricks are classified as first class bricks.
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What is the primary use of common bricks?
What is the primary use of common bricks?
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Name one classification basis of bricks mentioned in the content.
Name one classification basis of bricks mentioned in the content.
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What type of brick is known for having a textured surface due to sand being sprinkled on the inner surfaces of the mould?
What type of brick is known for having a textured surface due to sand being sprinkled on the inner surfaces of the mould?
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Body bricks are obtained from the outer portion of the kiln.
Body bricks are obtained from the outer portion of the kiln.
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What is the main characteristic of perforated bricks?
What is the main characteristic of perforated bricks?
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Bricks that are also known as clinker bricks are referred to as _____ bricks.
Bricks that are also known as clinker bricks are referred to as _____ bricks.
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Match the type of brick with its usage:
Match the type of brick with its usage:
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Which type of brick defect is caused by the presence of alkalis?
Which type of brick defect is caused by the presence of alkalis?
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Hollow bricks can have holes that exceed 25% of their total volume.
Hollow bricks can have holes that exceed 25% of their total volume.
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What is the purpose of using coping bricks?
What is the purpose of using coping bricks?
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What is caused by iron sulphide on the brick surface?
What is caused by iron sulphide on the brick surface?
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Excess water can cause checks or cracks in bricks.
Excess water can cause checks or cracks in bricks.
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Name one advantage of Autoclaved Aerated Blocks (AAC).
Name one advantage of Autoclaved Aerated Blocks (AAC).
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Good clay tiles should have a water absorption of less than _______.
Good clay tiles should have a water absorption of less than _______.
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Match the following clay products with their definitions:
Match the following clay products with their definitions:
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Which of the following is NOT a characteristic of good clay tiles?
Which of the following is NOT a characteristic of good clay tiles?
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Blisters on bricks are caused by the presence of excess water.
Blisters on bricks are caused by the presence of excess water.
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What is a common engineering use for clay tiles?
What is a common engineering use for clay tiles?
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Study Notes
Clay Products Overview
- Clay products are used in construction and various applications.
- Main types include bricks, clay tiles, earthenware, terracotta, stoneware, and porcelain.
Bricks
- Bricks are rectangular blocks made of fired or sun-dried clay.
- Used in construction.
- Common brick sizes include standard (19cm x 9cm x 9cm), and nominal (20cm x 10cm x 10cm) with mortar.
- Other sizes include conventional (22.4 cm x 11.4 cm x 7.6 cm) and country/field (9" x 4.5" x 3").
- Bricks are classified by strength, appearance, and type of burning.
- First-class bricks are thoroughly burnt and uniform.
- Second-class bricks may have minor flaws.
- Third-class bricks are under-burned.
- Fourth-class bricks are over-burned and distorted.
- Common brick types include facing bricks (used for exterior), engineering bricks (strong, load-bearing), and others based on type of finish (sand-faced, rustic).
Brick Laying
- Brick laying uses mortar (mix of cement and sand or lime with sand or cement + lime + sand).
- Mortar ratios are commonly 1:3, 1:4, or 1:5 (binder:sand).
- Mortar thickness is typically 6.5mm to 9mm.
Brick Properties
- Good bricks should be uniform in size and shape, rectangular with parallel sides, and sharp edges.
- Uniform deep red or cherry color.
- Smooth texture and compact to prevent mortar slippage.
- Hard and durable with a metallic sound when struck together
- Low water absorption (12-15% of dry weight after 24 hours immersion)
- High crushing strength (at least 10 N/mm²).
Manufacturing of Clay Bricks
- Unsoiling, digging, weathering, blending, tempering, molding, drying, burning.
Clay Tiles
- Thin rectangular slabs used for flooring, roofing, walls, and partitions.
- Manufacturing process is similar to bricks.
- Good quality tiles have uniform texture, accurate sizes, free from flaws, low water absorption, and durability.
Other Miscellaneous Clay Products
- Earthenware : used for drain pipes, lavatory fittings and can be used for ornamental purposes
- Terracotta: used for ornamental purposes
- Stoneware: used for wash basins, water closets, floor tiles, and wall tiles
- Porcelain: (further study recommended)
Testing of Clay Products
- Tests for quality include dimensional testing, sound testing, structure testing, absorption testing, compressive testing, toughness testing, and hardness/abrasion testing.
Defects in Clay Products
- Efflorescence (white deposits), over burning, under burning, and bloating (spongy surface)
- Black core, chuffs, checks or cracks, and spots.
Advantages of Clay Bricks
- Fire resistance, durability, low maintenance , economical.
Disadvantages of Clay Bricks
- Time-consuming construction, not suitable for high seismic zones, water absorption, and low tensile strength.
Other Related Topics
- Autoclaved aerated concrete (AAC) - lighter, more insulating blocks.
- Different forms like cant bricks, coping bricks, bats, and various closures or shapes/sizes for different purposes.
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Description
This quiz covers the various types of clay products, focusing on bricks and their applications in construction. It includes information about different brick sizes, classifications, and types of brick laying techniques. Test your knowledge on the characteristics and uses of clay materials in building.
