PPT - Pavement Materials | Transportation Engineering - Civil Engineering (CE) PDF Download

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PAVEMENT MATERIALS
Page 2


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PAVEMENT MATERIALS
Introduction
?
Pavement subjected to various conditions
?
Weather changes
?
Impact loads
?
Imposed loads etc.
?
Should not undergo excessive deformation and settlement
?
Differential settlement – failure of pavement
?
Hence, high compressibility and plastic properties are not 
desirable for pavement construction
?
Good quality soil is required
Page 3


www .justbtech.com
PAVEMENT MATERIALS
Introduction
?
Pavement subjected to various conditions
?
Weather changes
?
Impact loads
?
Imposed loads etc.
?
Should not undergo excessive deformation and settlement
?
Differential settlement – failure of pavement
?
Hence, high compressibility and plastic properties are not 
desirable for pavement construction
?
Good quality soil is required
Pavement Cross section
?
Consists of different layers
?
Embankment
?
Subgrade
?
Subbase
?
Base
?
Wearing course
?
Different types of materials are used depending on the layer 
requirement.
Page 4


www .justbtech.com
PAVEMENT MATERIALS
Introduction
?
Pavement subjected to various conditions
?
Weather changes
?
Impact loads
?
Imposed loads etc.
?
Should not undergo excessive deformation and settlement
?
Differential settlement – failure of pavement
?
Hence, high compressibility and plastic properties are not 
desirable for pavement construction
?
Good quality soil is required
Pavement Cross section
?
Consists of different layers
?
Embankment
?
Subgrade
?
Subbase
?
Base
?
Wearing course
?
Different types of materials are used depending on the layer 
requirement.
?
Soil is the main constituent in Subgrade and embankment
?
Aggregates are used in the Sub base and base layer
?
Aggregates and binding material in the top layer
?
Sub grade and embankment provides support for the 
pavement
?
Different types of failures such as rutting and shoving in the 
flexible pavements, cracking in the rigid (concrete) 
pavements are due to poor subgrade soil.
Page 5


www .justbtech.com
PAVEMENT MATERIALS
Introduction
?
Pavement subjected to various conditions
?
Weather changes
?
Impact loads
?
Imposed loads etc.
?
Should not undergo excessive deformation and settlement
?
Differential settlement – failure of pavement
?
Hence, high compressibility and plastic properties are not 
desirable for pavement construction
?
Good quality soil is required
Pavement Cross section
?
Consists of different layers
?
Embankment
?
Subgrade
?
Subbase
?
Base
?
Wearing course
?
Different types of materials are used depending on the layer 
requirement.
?
Soil is the main constituent in Subgrade and embankment
?
Aggregates are used in the Sub base and base layer
?
Aggregates and binding material in the top layer
?
Sub grade and embankment provides support for the 
pavement
?
Different types of failures such as rutting and shoving in the 
flexible pavements, cracking in the rigid (concrete) 
pavements are due to poor subgrade soil.
Soil
?
Accumulation or deposit of earth material formed by the 
disintegration of rocks
?
Desirable Properties:
?
Stability
?
Incompressibility
?
Permanency of strength
?
Minimum change in volume
?
Good drainage
?
Ease of compaction
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FAQs on PPT - Pavement Materials - Transportation Engineering - Civil Engineering (CE)

1. What are the different types of pavement materials used in civil engineering?
Ans. In civil engineering, various types of pavement materials are used, including asphalt, concrete, gravel, and soil. These materials are selected based on factors such as cost, durability, traffic volume, and climate conditions.
2. What is the difference between asphalt and concrete pavements?
Ans. Asphalt pavements are made of a mixture of aggregates, such as sand and stone, and asphalt binder. They are flexible and can withstand heavy loads, making them suitable for highways and airports. Concrete pavements, on the other hand, are made of cement, water, and aggregates. They are rigid and have high strength, making them suitable for areas with high traffic and heavy loads.
3. How are pavement materials tested for quality assurance?
Ans. Pavement materials undergo various tests to ensure quality assurance. These tests include the determination of properties like density, strength, durability, and resistance to moisture and temperature changes. Some commonly used tests for pavement materials include the Marshall test for asphalt, the slump test for concrete, and the California Bearing Ratio (CBR) test for soil.
4. What factors should be considered when selecting pavement materials?
Ans. Several factors should be considered when selecting pavement materials, including cost, durability, climate conditions, traffic volume, and expected lifespan. For example, in areas with high traffic volume and heavy loads, durable materials such as asphalt or concrete may be more suitable. Additionally, climate conditions, such as freezing and thawing cycles, may require materials with good resistance to temperature changes.
5. How can pavement materials contribute to sustainability in civil engineering?
Ans. Pavement materials can contribute to sustainability in civil engineering by using recycled materials, such as reclaimed asphalt pavement (RAP) or recycled concrete aggregate (RCA). These materials reduce the demand for virgin resources, conserve energy, and decrease landfill waste. Furthermore, using permeable pavement materials can help manage stormwater runoff, reducing the strain on drainage systems and improving water quality.
26 videos|91 docs|58 tests
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