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Asked: July 22, 2020In: Transportation

What is difference between Asphalt and Bitumen?

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: January 11, 2019In: Transportation

When is scarification needed for road work?

keralitecivilengineer
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When is scarification needed for road work?

  1. Kuldeep Singh

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    Added an answer on July 7, 2020 at 9:27 pm

    I assume you are talking about flexible (asphalt) pavements. Sacrification is needed when the cuts, potholes and all deformations are such that : The optimum moisture content required for proper binding can no longer be met. The filler material won't bend properly if just put judging by the conditioRead more

    I assume you are talking about flexible (asphalt) pavements. Sacrification is needed when the cuts, potholes and all deformations are such that :

    • The optimum moisture content required for proper binding can no longer be met.
    • The filler material won’t bend properly if just put judging by the condition of the pavement.
    • The peak daily traffic on the road, does not permit it to be safe without reconstruction.

    The entire bituminous layer until the depth of the craters is scraped off, and a new layer with fresh material is then applied to reconstruct the road.

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Asked: June 3, 2020In: Transportation

Difference between GIS and GPS?

RaghavArora
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What is difference between GIS and GPS?

  1. Abbas Khan Civil Engineer

    Abbas Khan Civil Engineer

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    Abbas Khan Civil Engineer Learner
    Added an answer on June 4, 2020 at 8:57 am

    GIS is the software used to find capture, store, manipulate, analyze, and present all types of geographical data. The main purpose is to share the geographic location and other details of a specific point on the earth. It has multiple application in our daily lives especially in construction sectorsRead more

    GIS is the software used to find capture, store, manipulate, analyze, and present all types of geographical data. The main purpose is to share the geographic location and other details of a specific point on the earth. It has multiple application in our daily lives especially in construction sectors, flood control e.t.c

     

    While GPS is a global navigation satellite system that gives us time, velocity, location, etc,. The main objective is the accuracy in Position on the earth.GPS works through a technique called trilateration, which collects information to output the information.

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Asked: November 28, 2020In: Transportation

What is the difference between Airport, Aerodrome and Airfield?

Naif Alwadai
Naif Alwadai

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What is the difference between Airport, Aerodrome and Airfield?

  1. desvl

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    Added an answer on April 8, 2021 at 9:23 pm

    Airport: A place often with multiple runways where commercial aircraft regularly take off and land usually based on a schedule, it has buildings for passengers flight management (Control tower) and services such as refueling, maintenance etc. An airport is normally a commercial enterprise. An AirfieRead more

    Airport: A place often with multiple runways where commercial aircraft regularly take off and land usually based on a schedule, it has buildings for passengers flight management (Control tower) and services such as refueling, maintenance etc. An airport is normally a commercial enterprise.

    An Airfield is on a much smaller scale usually non commercial and used for private or irregular charter flights minimal runways and limited services can also be military. minimal if any control.

    An Aerodrome is an old English word that has been replace with the word airfield so aerodrome and airfield are the same.

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Asked: May 21, 2020In: Transportation

What is the Diference between Semi Dense Bituminous Macadam (SDBC) and Bituminous Macadam (BM)?

Fasi Ur Rahman
Fasi Ur Rahman

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What is the Diference between Semi Dense Bituminous Macadam (SDBC) and Bituminous Macadam (BM)?

  1. MohamedAquib

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    Added an answer on May 21, 2020 at 11:57 pm

    Bituminous Macadam is a Binder which is used for the 24-meter & 12-meter roads where the traffic movement is heavy. This can be laid in two or more courses for the better compressive strength. This shall comprise of 5 TO 7 percentage of bitumen. Semi Dense Bituminous Macadam is a binder that isRead more

    Bituminous Macadam is a Binder which is used for the 24-meter & 12-meter roads where the traffic movement is heavy. This can be laid in two or more courses for the better compressive strength. This shall comprise of 5 TO 7 percentage of bitumen.

    Semi Dense Bituminous Macadam is a binder that is laid after the BM course to obtain smoother finish on road surfaces. This is used in small roads of width less than 9 Meters. This course is laid directly on the wet mix macadam in smaller roads with a thickness of 25-30 mm. This shall comprise of 3 to 5 percentage of Bitumen.

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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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    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

Neenu S K

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What is the Coefficient of Subgrade Reaction?

  1. nikeetasharma

    nikeetasharma

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    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: December 6, 2017In: Transportation

What is the function of cross beam at the box girders and the bearing plates?

Gopal Mishra
Gopal Mishra

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What is the function of cross beam at the box girders and the bearing plates?

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