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    Experiment 4: Hydrometer Analysis

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    Thanaa' Marabeh
    This 3-sentence summary provides the key details about the soil mechanics lab experiment: The document describes Experiment 4 on hydrometer analysis that was conducted by student Thanaa' Marabeh to determine the particle size distribution of a soil sample. The experiment involved using a hydrometer to take readings of the soil-water solution over time to calculate the percentage of particles finer than various sizes and plot the results on a logarithmic curve. The results showed that the soil was well graded based on the particle size distribution curve produced from the hydrometer analysis.

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    Experiment 4: Hydrometer Analysis

    Uploaded by

    Thanaa' Marabeh
    41 views5 pages
    This 3-sentence summary provides the key details about the soil mechanics lab experiment: The document describes Experiment 4 on hydrometer analysis that was conducted by student Thanaa' Marabeh to determine the particle size distribution of a soil sample. The experiment involved using a hydrometer to take readings of the soil-water solution over time to calculate the percentage of particles finer than various sizes and plot the results on a logarithmic curve. The results showed that the soil was well graded based on the particle size distribution curve produced from the hydrometer analysis.

    Original Description:

    Soil mechanic report

    Original Title

    ‏‏‏‏Hydrometer Analysis

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    © © All Rights Reserved

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    This 3-sentence summary provides the key details about the soil mechanics lab experiment: The document describes Experiment 4 on hydrometer analysis that was conducted by student Thanaa' Marabeh to determine the particle size distribution of a soil sample. The experiment involved using a hydrometer to take readings of the soil-water solution over time to calculate the percentage of particles finer than various sizes and plot the results on a logarithmic curve. The results showed that the soil was well graded based on the particle size distribution curve produced from the hydrometer analysis.

    Copyright:

    © All Rights Reserved
    Download as DOCX, PDF, TXT or read online from Scribd
    Download as docx, pdf, or txt
    41 views5 pages

    Experiment 4: Hydrometer Analysis

    Uploaded by

    Thanaa' Marabeh
    This 3-sentence summary provides the key details about the soil mechanics lab experiment: The document describes Experiment 4 on hydrometer analysis that was conducted by student Thanaa' Marabeh to determine the particle size distribution of a soil sample. The experiment involved using a hydrometer to take readings of the soil-water solution over time to calculate the percentage of particles finer than various sizes and plot the results on a logarithmic curve. The results showed that the soil was well graded based on the particle size distribution curve produced from the hydrometer analysis.

    Copyright:

    © All Rights Reserved
    Download as DOCX, PDF, TXT or read online from Scribd
    Download as docx, pdf, or txt
    of 5

    ‫بسم هللا الرحمن الرحيم‬

    Palestine Technical University-Kadoorie

    Faculty of Engineering and Technology

    Building Engineering Department

    Soil Mechanics Lab

    Experiment 4 : Hydrometer Analysis

    Instructors: Eng. Waleed Zaid

    Course No. : 12310349

    Student name or group: Thanaa' Marabeh

    Date: 1 November 2021

    Page | 1
     Introduction :
     Theory:

    V=(Ys - Yw/18n) *D^2

    V= velocity (cm/s).
    Ys = specific weight of soil.
    Yw= unit weight of water (g/cm3).
    n= viscosity of water (g.s/cm^2 ).
    D= diameter of the soil.

     Objective:

    To know the particle-size distribution in a soil according to the size of the finer soil
    and the graphed logarithmic curve of the relationship between percent finer (%),
    and the diameter(mm).

     Equipment used:

    Hydrometer Balance Mixing container Sample of soil (must be


    (sensitive up to 0.01 g) silt or clay, the pan from
    the last experiment)

    Distilled water Thermometer Two lOOO-cc Deflocculating agent


    graduated cylinders

    Page | 2
     Procedures:

    1. Plans 50g of soil in the flask.

    2 -prepare a dispersion agent of (Na2Sio3) with concentration 4%

    3 -place the solution with distilled water inside the mixer for 10min

    4 -Add 125 ml from the solution to the soil in the flask and mix them well 5 -we fill
    the mixture on the cylinder and add 875 ml of distilled water 6 - we measure the
    temperature of the previous mixture

    7-we put the hydrometer device inside the Cylinder and record the

    :the Zero Correction (Fz ),the meniscus Correction(Fm)

    reading (Should be read .Then start taking reading the first reading will be at( 15-
    30sec)

    8-we calculate and prepare the particle- size distribution curve.

     Result :

    Gs = 2.75 , Dry Wt. of soil , Ws =50 g , Temperature = 26 ℃


    Time Hydrometer Percent finer (%) Effective

    Page | 3
    (min) Reading R Rcp a × Rcp ×100 Rcl depth A D(mm)
    Ws L(cm)
    0.25 45 45.65 89.474 46 8.9 0.0124 0.0739
    0.5 43 43.65 85.554 44 9.2 0.0124 0.053190074
    1 42 42.65 83.594 43 9.4 0.0124 0.03801768
    2 41 41.65 81.634 42 9.6 0.0124 0.027167039
    4 39 39.65 77.714 40 9.9 0.0124 0.019507845
    8 38 38.65 75.754 39 10.1 0.0124 0.013932767
    15 35 35.65 69.874 36 10.6 0.0124 0.01042387
    30 32 32.65 63.994 33 11.1 0.0124 0.007542626
    60 31 31.65 62.034 32 11.2 0.0124 0.005357412
    120 28 28.65 56.154 29 11.7 0.0124 0.003871899
    240 26 26.65 52.234 27 12 0.0124 0.002772724
    480 24 24.65 48.314 25 12.4 0.0124 0.001993021
    1440 22 22.65 44.394 23 12.7 0.0124 0.001164508

    Meniscus Correction, Fm = 1 , Zero Correction, Fz = 1


    ꭤ= 0.98 (from table 5-3)

     Calculations: (for the first row)


    1. Rcp=R+Ft-Fz
    Ft=- 4.85 +(0.25*T)= -4.85 +(0.25*26)=1.65
    Rcp=45+1.65-1=45.65

    2. Percent finer=(a×Rcp×100)/Ws=(0.98*45.65*100)/50= 89.474%

    3. Rcl=R+Fm

    45+1=46

    4. Effective depth L(cm), from table (5-1)=8.9 for R=45

    5. A, from table (5-2)=0.0124 for Gs = 2.75 and Temperature = 26 ℃

    Page | 4
    L
    6. D=A
    √ t
    8.9
    =0.0124*
    √ 0.25
    =0.074

     Discussion and comment:

    It's a well graded soil.

     Source of error:
    1. Human errors, such as errors in reading numbers or recording
    results and handling machines.
    2. Errors in the device, errors in the tools used, for example: the
    electronic scale is inaccurate
    3. Errors in the calculation.

    Page | 5

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