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Asked: July 22, 2020In: Transportation

What is difference between Asphalt and Bitumen?

Vivek Patel
Vivek Patel

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What is difference between Asphalt and Bitumen?

  1. Kamlaksha Rana

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    Kamlaksha Rana Beginner
    Added an answer on July 22, 2020 at 6:11 pm
    What is difference between Asphalt and Bitumen?

    In simple words, bitumen is a liquid that binds together asphalt. Asphalt-It is a mixture prepared by adding aggregates(sand, gravel, slag, crushed rocks) with appropriate binders like bitumen. Then it is laid down on-site to a decided level or thickness by a paving machine. Bitumen- This is the heaRead more

    In simple words, bitumen is a liquid that binds together asphalt.

    Asphalt-It is a mixture prepared by adding aggregates(sand, gravel, slag, crushed rocks) with appropriate binders like bitumen. Then it is laid down on-site to a decided level or thickness by a paving machine.

    Bitumen- This is the heavy semi-solid hydrocarbon produced by the distillation of crude oil.

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Asked: July 20, 2020In: Transportation

Which are the best method for traffic survey according to verious location?

Vivek Patel
Vivek Patel

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Which are the best method for traffic survey according to verious location?

  1. aviratdhodare

    aviratdhodare

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    aviratdhodare
    Added an answer on July 31, 2020 at 11:00 pm

    Traffic Survey Precise surveys, studies, and scientific analysis of traffic is necessary for traffic engineering and find wide applications in anticipating future requirements of roads, the advancement of existing facilities, design aspects, pavement design, and traffic guidelines and control. TraffRead more

    Traffic Survey

    Precise surveys, studies, and scientific analysis of traffic is necessary for traffic engineering and find wide applications in anticipating future requirements of roads, the advancement of existing facilities, design aspects, pavement design, and traffic guidelines and control.
    Traffic surveys, better-called traffic census, covers all kinds of traffic, size, and weight, traffic flow, traffic volume per hour, and per day, including seasonal variations/annual variations, distribution in different parts of a road network, and distribution in different directions at intersections.

    Traffic volume counts can be obtained by the following methods:

    Manual Method

    Automatic Counters

    • Pneumatic Counters
    • Electrical Counters
    • Photo-Electric Cell Counters

    Moving Observer Method

    Presentation of Traffic Volume Study Data

    The information acquired from traffic volume are introduced in various structures for coming to suitable end results relying upon the reason for examines:

    (a) Hourly, daily, weekly, seasonal, and annual variations of traffic in the form of charts or graphs.

    (b) Annual average daily traffic (AADT) of the total traffic as well as classified traffic is determined.

    • Concept of PCU.
    • If measured for a short period, not for an entire year, is known as Average Daily Traffic (ADT).

    (c) Design hourly volume of traffic

    (d) Traffic flow-lines are drawn through the route with the thickness of lines being proportional to the traffic volumes.

    (e) Traffic flow distribution at road intersections

     

     

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Asked: August 2, 2020In: Transportation

What is the ruling radius of a horizontal curve?

AdityaBhandakkar
AdityaBhandakkar

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What is the ruling radius of a horizontal curve?

  1. aviratdhodare

    aviratdhodare

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    aviratdhodare
    Added an answer on September 7, 2020 at 6:13 pm

    The maximum degree of curve or smallest radius for a railroad is 3 degrees on a new main line track with a maximum grade of 1% compensated at 0.04% per degree of curve; therefore a grade in a 3 degree curve would actually be 0.88%. For a highway it depends on what kind, where, typical traffic, speedRead more

    The maximum degree of curve or smallest radius for a railroad is 3 degrees on a new main line track with a maximum grade of 1% compensated at 0.04% per degree of curve; therefore a grade in a 3 degree curve would actually be 0.88%. For a highway it depends on what kind, where, typical traffic, speed limits, etc.  Degree of curve is the angle between the radii of a curve of a 100 foot chord which is chord definition. Highway departments usually use Degree of Curve as the angle between the radii of a curve of an arc of 100 feet. For curves 3 degrees or under, the difference between the definitions staked on the ground is inconsequential.

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Asked: August 2, 2020In: Transportation

What is the difference between Tar and Bitumen?

vivek gami
vivek gami

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What is the difference between Tar and Bitumen?

  1. Abbas Khan Civil Engineer

    Abbas Khan Civil Engineer

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    Abbas Khan Civil Engineer Learner
    Added an answer on August 10, 2020 at 8:35 am

    Bitumen; BITUMEN is a petroleum product formed by the process of distillation of crude petroleum. It is available both in solid and liquid form. It is providing a good grip to the tyres as compared to the coal tar. Bitumen is available in three types that is; Rapid Setting, Slow Setting and Medium sRead more

    Bitumen;

    BITUMEN is a petroleum product formed by the process of distillation of crude petroleum. It is available both in solid and liquid form. It is providing a good grip to the tyres as compared to the coal tar. Bitumen is available in three types that is; Rapid Setting, Slow Setting and Medium setting. In the modern era, we used bitumen instead of Coal Tar because Coal Tar is Carcinogenic.

    COAL TAR; Coal tar is derived from the coal.It is a black viscous liquid used as a sealing agent in old roads making all over the world. It is not used in the current era, due to the carcinogenic product. It is produced through the process of destructive distillation in the absence of air. Coal Tar not provide enough grip to the tyres of the vehicle and heat up quickly causes wearing out of tyres.

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Asked: September 27, 2020In: Transportation

Coefficient of Subgrade Reaction?

Neenu S K
Neenu S K

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What is the Coefficient of Subgrade Reaction?

  1. nikeetasharma

    nikeetasharma

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    nikeetasharma Guru
    Added an answer on November 10, 2020 at 7:41 pm

    The coefficient of subgrade reaction is referred as the ratio between the pressure against the footing or mat and the settlement at a given point expressed as the coefficient of subgrade reaction which is defined as the ratio between the pressure against the footing or mat and the settlement at a giRead more

    The coefficient of subgrade reaction is referred as the ratio between the pressure against the footing or mat and the settlement at a given point expressed as the coefficient of subgrade reaction which is defined as the ratio between the pressure against the footing or mat and the settlement at a given point which is expressed as ;
    ks = q/S

    where,
    ks = coefficient of subgrade reaction
    q = pressure on the footing or mat at a given point
    S = settlement of the same point of the footing or mat in the corresponding unit of length

    i. The value of k is independent of the magnitude of pressure.
    ii. The value of s has the same value for every point on the surface of the footing.

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Asked: October 5, 2020In: Transportation

What are the best economical pavement design method for road construction?

aviratdhodare
aviratdhodare

aviratdhodare

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aviratdhodare

What are the best economical pavement design method for road construction?

  1. aviratdhodare

    aviratdhodare

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    aviratdhodare
    Added an answer on October 15, 2020 at 7:41 am
    This answer was edited.

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Asked: July 27, 2020In: Transportation

Which is the widely used industry-standard software for Pavement design in India?

VoiD
VoiD

VoiD

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Which is the widely used industry-standard software for Pavement design in India?

  1. nikeetasharma

    nikeetasharma

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    Added an answer on December 17, 2020 at 2:59 pm

    IIT Pave is the most widely used industry standard software for pavement design in india.

    IIT Pave is the most widely used industry standard software for pavement design in india.

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Asked: August 2, 2020In: Transportation

What is the difference between Highway and Airfield pavement?

AdityaBhandakkar
AdityaBhandakkar

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What is the difference between Highway and Airfield pavement?

  1. Vivek Patel

    Vivek Patel

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    Vivek Patel User
    Added an answer on August 3, 2020 at 6:22 pm

    Comparison of both is Highway pavement Cost is low. Less toughness compare to airfield. Design load is less. Less hardness compare to airfield. Compare to airfield, less construction cost and design cost. Length of Highway payment is very high. Airfield pavement Cost is high. High toughness need. DeRead more

    Comparison of both is

    Highway pavement

    • Cost is low.
    • Less toughness compare to airfield.
    • Design load is less.
    • Less hardness compare to airfield.
    • Compare to airfield, less construction cost and design cost.
    • Length of Highway payment is very high.

    Airfield pavement

    • Cost is high.
    • High toughness need.
    • Design load is very High
    • Need higher resistant to wear and tear due to aircraft trust.
    • Design cost and material cost is high due to rigid specifications and high level of construction practice.
    • Length of airfield pavement is less compare to Highway pavement.
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