Laboratory Progress Report ( Atterberg Limit) PDF

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Group Members: 1. ALLY EASTER ALAN (BK18110132) 2. MOHD FAHMIE IZZUDIN BIN SHARUDIN (BK18110259) 3. MOHD SYEDDRE BIN SUTARNO (BK18160285) 4. NOOR IDAYU MOHD AZMI (BK18110219) 5. PRICYNTHIA BIUSTI (BK18110105) Group Leaders: NOOR IDAYU MOHD AZMI Date of Submission 16 thMAY 2021A: Explain the Project ...

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PBL PROGRESS REPORT Week 8 (GEOTECHNICAL LAB) Group Members:

Group Leaders: Date of Submission

1. ALLY EASTER ALAN (BK18110132) 2. MOHD FAHMIE IZZUDIN BIN SHARUDIN (BK18110259) 3. MOHD SYEDDRE BIN SUTARNO (BK18160285) 4. NOOR IDAYU MOHD AZMI (BK18110219) 5. PRICYNTHIA BIUSTI (BK18110105) NOOR IDAYU MOHD AZMI 16th MAY 2021

A: Explain the Project Resources (soils, materials) that have been & have yet to be collected so far. The soil used in the Atterberg Limit Test experiment is clayey in nature. It is dry at first, and then a certain amount of water is added to make it clayey. The sample for the plastic limit and liquid limit tests will be taken from the same wet soil sample, which will be oven dried to determine the moisture content value.

Figure 1: Wetted Soil B: Explain the lab preparation of the material that has been conducted in the lab (Ex: Burning, sieving, etc).

The dry soil sample is first pulverized with the mortar and pestle to prepare material for both LL and PL tests. 300-400 grams of soil are placed in the evaporating dish and mixed with a spatula while steadily pouring water until a soil paste is formed. For the PL experiment, a tiny amount of soil paste is set aside in another evaporating dish. There are eight aluminum samples in all that need to be weighed and cleaned before it can be used. The LL uses five cans, while the PL only uses three. Then, using the Casagrande device, an appropriate amount of soil paste is inserted and leveled in the cup, followed by a center-cut with the grooving tool. The Casagrande computer is used to run five cycles of the LL experiment. The number of blows is

PBL PROGRESS REPORT Week 8 (GEOTECHNICAL LAB) reported in the lab manual's result table. Some samples have been taken from the cycle, contained in aluminum for weighed and recorded. The soil sample is first scattered onto the glass plate for the PL experiment. The soil thread is formed by rolling the leveled sample by hand. Three bits of soil thread are rolled until they are around 3 mm in diameter. The threads of soil are inserted into the aluminum sample weighed and kept track of. All of the samples are left in the laboratory for 24 hours before they can be weighed and recorded.

C: List the lab experiments of the soil that have been conducted so far. Detail the purpose of the lab experiments.

Geotechnical engineers should test soils planned to support buildings, pavements, or different burdens to foresee their activities under applied forces and variable moisture conditions. In geotechnical research centres, soil mechanics tests are utilized to determine particle size distribution, shear strength, moisture content, and the ability for cohesive soils to expand or shrink. The moisture content at which fine-grained mud and sediment soils change between solid, semi-solid, plastic, and fluid states is dictated by Atterberg limits tests. Silt and Clay soils go through four conditions of consistency as moisture content increases: solid, semi-solid, plastic, and liquid. The strength, consistency, and conduct of each stage contrast essentially. Moisture content at the focuses where actual changes happen, Atterberg limit tests precisely characterize the limits between these states. The test outcomes and determined lists can be utilized to plan primary establishments and foresee the conduct of soil infills, embankments, and pavements. The qualities are utilized to evaluate shear strength, predict settlement, and classify potentially expansive soils.

PBL PROGRESS REPORT Week 8 (GEOTECHNICAL LAB) D: Summarize the results of the lab experiments conducted in part C. Submit available attachments to support the report.

Liquid Limit (Casagrande Device): Test No.

1

2

3

4

No. of blows

220

119

48

23

Mass of container (g)

7.12

7.73

7.38

7.33

Mass of container + wet soil (g)

24.21

18.53

17.46

30.17

Mass of container + dry soil (g)

19.87

16.15

15.00

24.14

Mass of water (g)

4.34

2.38

2.46

6.03

Mass of dry soil (g)

12.75

8.42

7.62

16.81

Moisture content (%)

34.04

28.27

32.28

35.87

●

Moisture Content (%)

(𝑀𝑎𝑠𝑠 𝑜𝑓 𝑐𝑜𝑛𝑡𝑎𝑖𝑛𝑒𝑟 + 𝑤𝑒𝑡 𝑠𝑜𝑖𝑙) − (𝑀𝑎𝑠𝑠 𝑜𝑓 𝑐𝑜𝑛𝑡𝑎𝑖𝑛𝑒𝑟 + 𝑑𝑟𝑦 𝑠𝑜𝑖𝑙) (𝑀𝑎𝑠𝑠 𝑜𝑓 𝑐𝑜𝑛𝑡𝑎𝑖𝑛𝑒𝑟 + 𝑑𝑟𝑦 𝑠𝑜𝑖𝑙) − (𝑀𝑎𝑠𝑠 𝑜𝑓 𝑐𝑜𝑛𝑡𝑎𝑖𝑛𝑒𝑟) ●

Liquid Limit (LL)

=

34.04 + 28.27 + 32.28 + 35.87 4

= 32. 62

𝑥 100

PBL PROGRESS REPORT Week 8 (GEOTECHNICAL LAB) Plastic Limit: Test No.

1

2

3

Mass of container (g)

7.59

6.60

4.33

Mass of container + wet soil (g)

11.15

9.71

7.12

Mass of container + dry soil (g)

10.50

9.15

6.53

Mass of water (g)

3.56

3.11

2.79

Mass of dry soil (g)

2.91

2.55

2.20

Moisture content (%)

22.34

21.96

26.82

●

Moisture content (%)

(𝑀𝑎𝑠𝑠 𝑜𝑓 𝑐𝑜𝑛𝑡𝑎𝑖𝑛𝑒𝑟 + 𝑤𝑒𝑡 𝑠𝑜𝑖𝑙) − (𝑀𝑎𝑠𝑠 𝑜𝑓 𝑐𝑜𝑛𝑡𝑎𝑖𝑛𝑒𝑟 + 𝑑𝑟𝑦 𝑠𝑜𝑖𝑙) (𝑀𝑎𝑠𝑠 𝑜𝑓 𝑐𝑜𝑛𝑡𝑎𝑖𝑛𝑒𝑟 + 𝑑𝑟𝑦 𝑠𝑜𝑖𝑙) − (𝑀𝑎𝑠𝑠 𝑜𝑓 𝑐𝑜𝑛𝑡𝑎𝑖𝑛𝑒𝑟) ●

Plastic Limit (PL)

𝑆𝑢𝑚 𝑜𝑓 𝑚𝑜𝑖𝑠𝑡𝑢𝑟𝑒 𝑐𝑜𝑛𝑡𝑒𝑛𝑡 𝑁𝑢𝑚𝑏𝑒𝑟 𝑜𝑓 𝑡𝑒𝑠𝑡

=

22.34 + 21.96 + 26.82 3

= 23. 71

𝑥 100

PBL PROGRESS REPORT Week 8 (GEOTECHNICAL LAB) E: Attachment (if any)

Figure 2: Process of crushing the soil into smaller particles

Figure 3: Process of adding water into the crushed soil...