chapter 7

Question 1

These refer to the various layers of materials used in the construction of roads, highways, airport, runways, and other transportation surfaces.

Answer 1

Pavement materials

Question 2

In the context of construction and
engineering, these refer to detailed requirements and standards that define the characteristics, properties, and
performance criteria of materials, products, or processes.

Answer 2

Specifications

Question 3

These are designed to ensure the quality,
durability, and safety of pavement materials.

Answer 3

Specifications and Tests for Pavement Materials

Question 4

Ensures that the aggregate particles are
distributed within specified size ranges.

Answer 4

Test: Gradation
Apparatus: Sieves

Question 5

Evaluates the shape of aggregate particles, as it can affect the strength and stability of
the pavement.

Answer 5

Test: Particle Shape
Apparatus: Flakiness
Sieves

Question 6

Measures the resistance of aggregates to
abrasion and wear.

Answer 6

Test: Abrasion Resistance
Apparatus: Los Angeles Abrasion Machine

Question 7

Assesses the durability of aggregates when
subjected to freeze-thaw cycles or wetting and drying.

Answer 7

Test: Soundness
Apparatus: Soundness Basket

Question 8

Aggregate Specifications and Tests

Answer 8

Gradation
Particle Shape
Abrasion
Soundness

Question 9

Measures the consistency of asphalt by assessing the depth to which a standard
needle penetrates the asphalt sample.

Answer 9

Test: Penetration
Apparatus: Penetrometer

Question 10

Determines the temperature at which
the asphalt becomes soft.

Answer 10

Test: Softening Point
Apparatus: Ring and Ball Apparatus

Question 11

Measures the ability of the asphalt binder to stretch without breaking.

Answer 11

Test: Ductility
Apparatus: Ductility Testing Machine

Question 12

Assesses the flow characteristics of the
asphalt binder at different temperatures.

Answer 12

Test: Viscosity
Apparatus: Engler Viscometer

Question 13

Asphalt (Bitumen) Specifications and Tests

Answer 13

Penetration
Softening Point
Ductility
Viscosity

Question 14

Measures the ability of concrete to withstand axial loads.

Answer 14

Test: Compressive Strength
Apparatus: Universal Testing Machine

Question 15

Evaluates the ability of concrete to resist
bending.

Answer 15

Test: Flexural Strength
Apparatus: Universal Testing Machine

Question 16

Include tests for freeze-thaw resistance, sulfate resistance, and alkali aggregate reactivity.

Answer 16

Test: Durability Test
Apparatus: Freeze-thaw Cabinet

Question 17

Determines the amount of entrained air in the concrete mix, which can affect freeze-thaw resistance.

Answer 17

Test: Air Content
Apparatus: Air Content Meter

Question 18

Concrete Specifications and Tests

Answer 18

Compressive Strength
Flexural Strength
Durability Test
Air Content

Question 19

Determines the maximum dry density and optimum moisture content of soil for compaction.

Answer 19

Test: Proctor Compaction Test
Apparatus: Proctor Mould and Rammer

Question 20

Measures the load-carrying capacity of a soil sample under controlled conditions.

Answer 20

Test: California Bearing Ratio
Apparatus: CBR Test Machine

Question 21

Assesses the shear strength of soils under
different confining pressures.

Answer 21

Test: Triaxial Compression Test
Apparatus: Triaxial Testing Apparatus

Question 22

Measures the liquid limit and plastic limit
of soil.

Answer 22

Test: Atterberg Limit Test
Apparatus: ASTM Liquid Limit Machine

Question 23

Determines the ground’s bearing capacity and actual strength by applying an increasing load from a circular steel plate to induce settlement.

Answer 23

Test: Plate Bearing Test
Apparatus: Plate Load Test Apparatus

Question 24

Soil Specifications and Tests

Answer 24

Proctor Compaction Test
California Bearing Ratio
Triaxial Compression Test
Atterberg Limit Test
Plate Bearing Test

Question 25

Measures the resistance of geotextiles and geogrids to tensile forces.

Answer 25

Test: Tensile Strength Apparatus: Geotextile Seam Strength Test Equipment

Question 26

Evaluates the flow characteristics of geotextiles, important for drainage applications.

Answer 26

Test: Permeability Apparatus: Geotextile Vertical Permeability Tester

Question 27

Assesses the ability of geotextiles to resist puncture from sharp objects.

Answer 27

Test: Puncture Resistance Apparatus: Static Puncture Strength Test Fixture

Question 28

Geotextile and Geogrid Specifications and Tests

Answer 28

Tensile Strength Permeability Puncture Resistance

Question 29

Evaluates the stability and flow of asphalt mixtures.

Answer 29

Marshall Stability and Flow Test Apparatus: Marshall Stability Test Apparatus

Question 30

Measures the compacted density and air voids in asphalt mixtures.

Answer 30

Density Air Void Content Apparatus: Ground Penetrating Radar

Question 31

Testing for Asphalt Mixures

Answer 31

Marshall Stability Flow Test Density Air Void Content

Question 32

Determines the in-place density of compacted materials in the field.

Answer 32

Field Density Test Apparatus: Sand Density Cone Apparatus

Question 33

Involves extracting cores from the pavement to assess the quality and properties of the materials in place.

Answer 33

Core Sampling Apparatus: Core Drilling Machine

Question 34

Quality Control and Assurance Test

Answer 34

Field Density Test Core Sampling

Question 35

Simulates the effect of traffic loads on asphalt pavement by measuring rutting resistance.

Answer 35

Test: Wheel Tracking Test Apparatus: Hamburg Wheel Tracking Device (HWTD)

Question 36

Evaluates the frictional characteristics of the pavement surface.

Answer 36

Test: Skid Resistance Test Apparatus: Skid Resistance Tester

Question 37

Measures the strength of unbound pavement layers.

Answer 37

Test: Dynamic Cone Penetrometer (DCP) Apparatus: Dynamic Cone Penetrometer

Question 38

Performance Testing

Answer 38

Wheel Tracking Test Skid Resistance Test Dynamic Cone Penetrometer (DCP)

Question 39

These guidelines shall apply to the design of new flexible pavement and reconstruction of damaged pavements for roads with a design traffic. These should keep a detailed record of the year of construction, subgrade CBR, soil characteristics, pavement composition and specification, traffic, pavement performance, overlay history, climatic conditions, etc.

Answer 39

Flexible Pavement Design (IRC:37-2018)

Question 40

Wheel Load Factors

Answer 40

Maximum Wheel Load Contact Pressure Wheel Load Configuration Load Repetitions

Question 41

the maximum pressure a single wheel exerts on the road surface, and it is a critical factor in pavement design

Answer 41

Maximum Wheel Load

Question 42

the pressure exerted by a vehicle's tires on the road surface, calculated by dividing the wheel's load by the contact area

Answer 42

Contact Pressure

Question 43

are important to know the way in which the loads of a vehicle are applied on the pavement surface

Answer 43

Wheel Load Configurations

Question 44

For highways maximum legal axle load as specified by IRC is _______ with a maximum equivalent single wheel load of _________.

Answer 44

8170 kg 4085kg

Question 45

The design load axle load of two axle heavy commercial vehicles by IRC taken as _________ and the design wheel load on each dual wheel assembly is taken as _________.

Answer 45

1020 kg 5100 kg

Question 46

The maximum total legal load on the tandem axles of HCR is _________ and thus the legal load on each axle is ________.

Answer 46

19000 kg 9500 kg

Question 47

The guidelines cover the design of plain jointed cement concrete pavements with and without tied concrete shoulders. These are applicable to roads having an average daily commercial vehicle more than 450 with laden weight exceeding 3tonnes.

Answer 47

Rigid Pavement Design (IRC:58-2015)