CEC 307 Assignment 1 for group B

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This topic contains 18 replies, has 15 voices, and was last updated by  joel victor japhet 3 months, 1 week ago.

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  • #7006

    favour ogazi
    Participant

    Name-Ogazi favour Nkechinyere
    Dept- civil Engineering
    level Hnd 1 Evening
    Group B

    Question 1
    what is the title of the video
    Answer -The title of the video is california bearing ratio test

    list the tools and apparatus for the test

    Answer-The tools and apparatus are ; compaction mold ,spacer disk trowel , filter paper,wrench,hammer,scraper,measuring cylinder,a tray to contain the sample,surcharge weight of2.5kg each having ahole of 53mm diameter, a penetration plungerof 100mm height and diameter of 50mm, a loading machine of 500kg

    Question 3 procedure

    Answer
    a. Using a number 4 sieve sift 4.5kg of soil
    b. Condition the soil by adding water until it reaches its maximum moisture content

    COMPACTION PROCESS
    c.remove the screw from the compaction mold.
    b.remove the main mold from the platform
    c.place the spacer disk and filter paper on top of the mold
    d. return the mold to the platform
    e.Transfer the soil into the compaction mold
    f.Compact the soil into three layers using 25 blows, 2nd layer add more soil to the compaction mold and compact using 25 blows
    g.Reattach the upper portion of the compaction mold ,3rd layer add more soil to the compaction mold and compact
    h.Remove the upper portion of the compaction layer
    I.Scrape off any remaining soil,remove the compaction mold from the platform
    j.Weigh the compacted soil+mold

    K.Reattach the mold to the platform without the spacer disk
    L.Place the mold onto the machine,load the first disk,load the second disk
    M. Turn on the detection , start test on the computer

    Question 4. state the necessary precautions
    Answer 1.It was ensured that the three layers of the soil sample was given equal blows

    2. It was ensured that the mold was on level surface while compacting

    Question 5 What was the result

    Answer.The result of the standard local valves
    Penetration(mm)unit loading kg(f)
    total loading kg(f)
    2.57013350
    5.01052055

    #7007

    joel victor japhet
    Participant

    Name:joel victor japhet
    Dept: Civil engineering HND1 Evening
    Course:CEC 307P
    Group B

    ANSWERS

    1. Determination of California Bearing Ration (C.B.R) Test
    2. Apparatus: As per 15:2720 (Part 16)
    a. Mixing tools (trowel, spoon etc)
    b. C.B.R mould with diameter 150mm and height of 175mm
    c. Mould collar and the base
    d. Spacer DISC with diameter of 148mm and height of 47.7mm
    e. Surcharge weight of 2.5kg with hole 53mm
    f. Slotted weight of 2.5kg
    g. Penetration plunger with height 100mm and base = 50mm
    h. Loading machine capacity of 5000kg and uniform rate of 1.25mm per hour
    i. Dial gauge
    j. Compaction Rammer
    k. Coating bowl
    l. Filter paper.
    3. The test procedure consist of two parts which are:
    a. Preparing test specimen
    b. Penetration test.
    And the following step was taken:
    i. Soil sample was collected and passed through sieve and poured into a metal tray
    ii. It was thoroughly mixed with water to a homogenous state
    iii. It was compacted into three layers at the rate of 56 – uniformly distributed bowls for each layer inside the mould.
    iv. The mould moist sample was weighed and recorded
    v. The space disc discover that base plate were inserted as the filter paper was placed out.
    vi. Place the mould in the loading frame and its position was adjusted until the piston is centered on the specimen
    vii. The total reading of the penetration were recorded.
    4a. It was ensured that the reading were recorded carefully so as to avoid error in computation of result
    b. It was ensured that the mould was on leveled surface while compacting so as to have a uniformly distributed blows.
    c. It was ensured that the soil sample was compacted into three layers at the rate of 56 uniformly distributed blows for each layer inside the mould.
    5. The result of the standard load valves.
    Penetration (mm) Unit load kg (f)/cm2 Total load kg (f)
    2.5 70 1350
    5.0 105 2055

    #7075

    Name:Sylvanus Glory Amarachi
    Dept: Civil engineering HND1 Evening
    Course:CEC 307P
    Group D

    ANSWERS

    1. Determination of California Bearing Ration (C.B.R) Test
    2. Apparatus: As per 15:2720 (Part 16)
    a. Mixing tools (trowel, spoon etc)
    b. C.B.R mould with diameter 150mm and height of 175mm
    c. Mould collar and the base
    d. Spacer DISC with diameter of 148mm and height of 47.7mm
    e. Surcharge weight of 2.5kg with hole 53mm
    f. Slotted weight of 2.5kg
    g. Penetration plunger with height 100mm and base = 50mm
    h. Loading machine capacity of 5000kg and uniform rate of 1.25mm per hour
    i. Dial gauge
    j. Compaction Rammer
    k. Coating bowl
    l. Filter paper.
    3. The test procedure consist of two parts which are:
    a. Preparing test specimen
    b. Penetration test.
    And the following step was taken:
    i. Soil sample was collected and passed through sieve and poured into a metal tray
    ii. It was thoroughly mixed with water to a homogenous state
    iii. It was compacted into three layers at the rate of 56 – uniformly distributed bowls for each layer inside the mould.
    iv. The mould moist sample was weighed and recorded
    v. The space disc discover that base plate were inserted as the filter paper was placed out.
    vi. Place the mould in the loading frame and its position was adjusted until the piston is centered on the specimen
    vii. The total reading of the penetration were recorded.
    4a. It was ensured that the reading were recorded carefully so as to avoid error in computation of result
    b. It was ensured that the mould was on leveled surface while compacting so as to have a uniformly distributed blows.
    c. It was ensured that the soil sample was compacted into three layers at the rate of 56 uniformly distributed blows for each layer inside the mould.
    5. The result of the standard load valves.
    Penetration (mm) Unit load kg (f)/cm2 Total load kg (f)
    2.5 70 1350
    5.0 105 2055

    #7110

    joel victor japhet
    Participant

    Name:joel victor japhet
    Dept: Civil engineering HND1 Evening
    Course:CEC 307P
    Group B

    Questions.

    1. What is the title of the video you just watched?
    2. List the tools and apparatus for the experiment.
    3. State the procedure for the experiment.
    4. State the necessary precautions used to obtain adequate readings.
    5. What was the result of the experiment?

    ANSWERS

    1. Determination of California Bearing Ration (C.B.R) Test
    2. Apparatus: As per 15:2720 (Part 16)
    a. Mixing tools (trowel, spoon etc)
    b. C.B.R mould with diameter 150mm and height of 175mm
    c. Mould collar and the base
    d. Spacer DISC with diameter of 148mm and height of 47.7mm
    e. Surcharge weight of 2.5kg with hole 53mm
    f. Slotted weight of 2.5kg
    g. Penetration plunger with height 100mm and base = 50mm
    h. Loading machine capacity of 5000kg and uniform rate of 1.25mm per hour
    i. Dial gauge
    j. Compaction Rammer
    k. Coating bowl
    l. Filter paper.
    3. The test procedure consist of two parts which are:
    a. Preparing test specimen
    b. Penetration test.
    And the following step was taken:
    i. Soil sample was collected and passed through sieve and poured into a metal tray
    ii. It was thoroughly mixed with water to a homogenous state
    iii. It was compacted into three layers at the rate of 56 – uniformly distributed bowls for each layer inside the mould.
    iv. The mould moist sample was weighed and recorded
    v. The space disc discover that base plate were inserted as the filter paper was placed out.
    vi. Place the mould in the loading frame and its position was adjusted until the piston is centered on the specimen
    vii. The total reading of the penetration were recorded.
    4a. It was ensured that the reading were recorded carefully so as to avoid error in computation of result
    b. It was ensured that the mould was on leveled surface while compacting so as to have a uniformly distributed blows.
    c. It was ensured that the soil sample was compacted into three layers at the rate of 56 uniformly distributed blows for each layer inside the mould.
    5. The result of the standard load valves.
    Penetration (mm) Unit load kg (f)/cm2 Total load kg (f)
    2.5 70 1350
    5.0 105 2055

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