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Geotechnical Engineering

Home/Geotechnical Engineering/Page 5

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Asked: July 31, 2020In: Geotechnical Engineering

What are the properties and significance of Fire Clay?

Vivek Patel
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What are the properties and significance of Fire Clay?

  1. nikeetasharma

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    Added an answer on October 8, 2020 at 7:31 pm

    Fire clay :- Fire clay is a range of refractory clays used in the manufacture of ceramics, especially fire brick. The United States Environmental Protection Agency defines fire clay very generally as a "mineral aggregate composed of hydrous silicates of aluminium (Al2O3·2SiO2·2H2O) with or without fRead more

    Fire clay :-

    Fire clay is a range of refractory clays used in the manufacture of ceramics, especially fire brick. The United States Environmental Protection Agency defines fire clay very generally as a “mineral aggregate composed of hydrous silicates of aluminium (Al2O3·2SiO2·2H2O) with or without free silica.”

    Properties of fire clay :-

    Fire clay is resistant to high temperatures, having fusion points higher than 1,600 °C (2,910 °F); therefore it is suitable for lining furnaces, as fire brick, and for manufacture of utensils used in the metalworking industries, such as crucibles, saggars, retorts and glassware. Because of its stability during firing in the kiln, it can be used to make complex items of pottery such as pipes and sanitary ware.

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Asked: June 24, 2020In: Geotechnical Engineering

What is Submerged Density and Degree of Shrinkage?

Manas Ranjan Patra
Manas Ranjan Patra

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  What is the submerged density and degree of shrinkage?

  1. Kuldeep Singh

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    Added an answer on June 28, 2020 at 10:30 pm

    Submerged density or bouyant density is the density of a mass of soil as observed under water in a saturated condition of course. Suppose you are calculating the density when the soil mass and you yourself are submerged. It is calculated as the difference of the soil density in air and the density oRead more

    Submerged density or bouyant density is the density of a mass of soil as observed under water in a saturated condition of course. Suppose you are calculating the density when the soil mass and you yourself are submerged. It is calculated as the difference of the soil density in air and the density of water, divided by the density of water.

    SD = (density of soil – density of water) / density of water

    or

    SD = density of soil in air – 1

    It is also defined as the mass of soil minus the mass of water displaced by it upon submergence, divided by the volume.

    This concept is particularly useful in determining the bouyancy of submerged soils and is crucial in equations of sediment transport in rivers. If the bouyant density equals 1, the soil just floats. If it gets negative, soil will rise in water.

    Degree of shrinkage is another concept. It is the amount of water content reduction needed to bring the soil to its shrinkage limit, expressed as percent of the original water content.

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Asked: October 12, 2020In: Geotechnical Engineering

What are the Methods of Interpolation of Contours?

ISMAEL PUNGA
ISMAEL PUNGA

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What are the Methods of Interpolation of Contours?

  1. nikeetasharma

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    Added an answer on October 14, 2020 at 6:36 pm

    Interpolation of the contours is the process of spacing the contours proportionately between the plotted ground points established by indirect methods. The methods of interpolation are based on the assumption that the slope of ground between the two points is uniform. Methods of interpolation of conRead more

    Interpolation of the contours is the process of spacing the contours proportionately between the plotted ground points established by indirect methods. The methods of interpolation are based on the assumption that the slope of ground between the two points is uniform.

    Methods of interpolation of contour are as follows :-

    1. Arithmetic calculation
    2. Graphical calculation
    3. Estimation calculation

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Asked: January 4, 2019In: Geotechnical Engineering

Why we Conduct the SPT Test in Soil investigation?

Vinnarasan
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Why we conduct soil penetration test in soil investigation?

  1. AdityaBhandakkar

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    Added an answer on August 23, 2020 at 10:41 am
    Why we Conduct the SPT Test in Soil investigation?

    As a civil engineer to check the geotechnical properties of soil, three guests must be performed the shear test, bearing test, and penetration test. A penetration test is performed by three methods, standard penetration test A dynamic cone penetration test Cone penetration test or Dutch cone penetraRead more

    As a civil engineer to check the geotechnical properties of soil, three guests must be performed the shear test, bearing test, and penetration test.

    A penetration test is performed by three methods,

    1. standard penetration test
    2. A dynamic cone penetration test
    3. Cone penetration test or Dutch cone penetration test.

    In Geotechnical engineering, the value of standard penetration test is widely used for determining technical properties of soil.

    1. To check the soil parameters
    2. Value of cohesion and angle of internal friction with imperial relations.
    3. To know the deformation modulus.
    4. To check the consistency of soil
    5. For determining the bearing capacity of soil

    This test is globally used to determine various engineering and geotechnical properties for soil investigations.

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Asked: August 2, 2020In: Geotechnical Engineering

What is disturbed and undisturbed soil sample?

vivek gami
vivek gami

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What is disturbed and undisturbed soil sample?

  1. nikeetasharma

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    Added an answer on December 21, 2020 at 9:25 am

    Disturbed soil sample is one in which the structure of the soil has been changed sufficiently that tests of the structural properties of the soil will not be representatives of in-situ conditions, and only properties of soil grains can be accurately determined. Undisturbed soil sample is one where tRead more

    Disturbed soil sample is one in which the structure of the soil has been changed sufficiently that tests of the structural properties of the soil will not be representatives of in-situ conditions, and only properties of soil grains can be accurately determined.

    Undisturbed soil sample is one where the condition of the soil in the sample is close enough to the conditions of the soil in in-situ to allow tests of structural properties of the soil to be used to approximate the properties of the soil in-situ.

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Asked: June 29, 2020In: Geotechnical Engineering

What is Tacheometry?

RaghavArora
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What is a tachometry? What is it’s used in civil engineering projects?

  1. Soumyadeep Halder

    Soumyadeep Halder

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    Added an answer on June 30, 2020 at 6:46 pm

    ans- defination Tacheometric is a branch of surveying in which horizontal and vertical distances are determined by taking angular observation with an instrument known as a tachometer. Tacheometric surveying is adopted in rough in rough and difficult terrain where direct levelling and chaining are eiRead more

    ans- defination

    Tacheometric is a branch of surveying in which horizontal and vertical distances are
    determined by taking angular observation with an instrument known as a tachometer.
    Tacheometric surveying is adopted in rough in rough and difficult terrain where direct levelling
    and chaining are either not possible or very tedious.
    Tacheometric survey also can be used for Railways, Roadways, and reservoirs etc.
    Tacheometric surveying is very rapid, and a reasonable contour map can be prepared for
    investigation works within a short time on the basis of such survey.
    An ordinary transits theodolite fitted with a stadia diaphragm is generally used for tacheometric
    surveying.

    Uses of Tachometry in civil engineering
    Tachometry is used for preparation of topographic map where both horizontal and vertical
    distances are required to be measured; survey work in difficult terrain where direct methods of
    measurements are inconvenient; reconnaissance survey for highways and railways etc.;
    Establishment of secondary control points.

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Asked: November 28, 2020In: Geotechnical Engineering

What will be the best method to calculate vertical stress of soil in geotechnical engineering ?

nikeetasharma
nikeetasharma

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What will be the best method to calculate vertical stress of soil in geotechnical engineering ?

  1. aviratdhodare

    aviratdhodare

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    Added an answer on January 5, 2021 at 1:53 pm

    It depends on the condition of soil. Wt of dry soil +wt of water in soil + overlying Wt if any and so on. read the fallowing article in google for better idea. Vertical stress in the ground

    It depends on the condition of soil. Wt of dry soil +wt of water in soil + overlying Wt if any and so on. read the fallowing article in google for better idea.

    Vertical stress in the ground

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Asked: January 11, 2019In: Geotechnical Engineering

Soil Sample for Proctor Compaction Test

Ishaq Ahmed
Ishaq Ahmed

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I have confusion regarding proctor compaction test. As per Is code 2720: 8, soil sample used should be sieved through 19mm sieve.Then what is the relevance of 4.75mm sieve? Please clarify me regarding the soil sample and the usage of ...

  1. Madeh Izat Hamakareem

    Madeh Izat Hamakareem

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    Added an answer on July 29, 2019 at 4:24 pm

    As per Is code 2720: 8 section 4.1.1, Sieve No.4 is used to check whether aggregation materials after they have been broken into individual particles. and only individual particles shall be retained on the sieve no. 4. So, sieve No. 4 is used to check whether the aggregation materials have been brokRead more

    As per Is code 2720: 8 section 4.1.1, Sieve No.4 is used to check whether aggregation materials after they have been broken into individual particles. and only individual particles shall be retained on the sieve no. 4. So, sieve No. 4 is used to check whether the aggregation materials have been broken down properly or not.

    Based on ASTM D698-00a, Sieve no. 4 used to determine the method of compaction test. This Standard provides three Method of testing namely Method A, Method B, and Method C.

    Method A may be used if 20 % or less by mass of the material is retained on the No. 4 (4.75-mm) sieve.

    Method B Shall be used if more than 20 % by mass of the material is retained on the No. 4 (4.75-mm) sieve and 20 % or less by mass of the material is retained on the 3⁄8-in. (9.5-mm) sieve.

    Method C —Shall be used if more than 20 % by mass of the material is retained on the 3⁄8-in. (9.5-mm) sieve and less than 30 % by mass of the material is retained on the 3⁄4-in. (19.0-mm) sieve.

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