Atterberg- Plastic Limit TEST PDF

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CIVIL ENGINEERINGLABORATORYUITM PAHANG,KAMPUS JENGKACOURSE NAMECOURSE CODEOPEN-ENDED LABMARCH — AUGUST 2021TITLE OFEXPERIMENTDATE OFEXPERIMENT EC1104OGROUP1. 1. MUHAMMAD FAIZ BIN JAAFAR SIDEK (2019435374)GROUP MEMBERS2. 2. MUHAMMAD DZAKIRIN HANNAN BIN NORASHID3.( 2)4. AHMAD FIRDAUS BIN RAHIM (201942...

Description

CIVIL ENGINEERING LABORATORYUITM PAHANG, KAMPUS JENGKA COURSE NAME COURSE CODE OPEN-ENDED LAB MARCH — AUGUST 2021

TITLE OF EXPERIMENT DATE OF EXPERIMENT GROUP GROUP MEMBERS

PLASTIC LIMIT TEST

EC1104O 1. MUHAMMAD FAIZ BIN JAAFAR SIDEK (2019435374)

1. 2.

2. MUHAMMAD DZAKIRIN HANNAN BIN NORASHID (201925446 2)

3. 4.

3. AHMAD FIRDAUS BIN RAHIM (2019425002)

LECTURER LEVEL OF OPENESS

NO

ELEMENT

l

INTRODUCTION

2

BASIC CONCEPT

3 4

4. FIKRI NAJIB BIN ISMAIL (2019432126)

Marks

COPO

COMMENTS

SUMMARY OF PROCEDURES/METHOD ANALYSIS AND INTERPETATION OF DATA

5

DISCU SSION OF RESULT

2

4

6

8

10

6

CONCLUSIONS

2

4

6

8

10

TOTAL MARKS

/20

INTRODUCTION Plastic limit (PL) of a soil is the lowest water content at which the soil remain plastic, and when plotted against the liquid limit (LL) on the plasticity chart enables the classification of cohesive soils. Soil can be classified according to its moisture content as solid, semisolid, plastic and liquid. Each state has different consistency and behaviour hence different engineering properties. The boundary between each state can be defined based on the change in the soil’s behaviour which can be determine through in plastic limit test from Atterberg limit tests.

OBJECTIVES The objective of this experiment is to determine to the plastic limit of a soil sample.

PROCEDURE 1. 2. 3.

4.

5.

6.

Weigh the remaining empty moisture cans with their lids, and record the respective weights and can numbers on the data sheet. Take the remaining 1/4 of the original soil sample and add distilled water until the soil is at a consistency where it can be rolled without sticking to the hands. Form the soil into an ellipsoidal mass. Roll the mass between the palm or the fingers and the glass plate. Use sufficient pressure to roll the mass into a thread of uniform diameter by using about 90 strokes per minute. (A stroke is one complete motion of the hand forward and back to the starting position.) The thread shall be deformed so that its diameter reaches 3.2 mm (1/8 in.), taking no more than two minutes. When the diameter of the thread reaches the correct diameter, break the thread into several pieces. Knead and reform the pieces into ellipsoidal masses and re-roll them. Continue this alternate rolling, gathering together, kneading and re-rolling until the thread crumbles under the pressure required for rolling and can no longer be rolled into a 3.2 mm diameter thread. Gather the portions of the crumbled thread together and place the soil into a moisture can, then cover it. If the can does not contain at least 6 grams of soil, add soil to the can from the next trial (See Step 6). Immediately weigh the moisture can containing the soil, record its mass, remove the lid, and place the can into the oven. Leave the moisture can in the oven for at least 16 hours. Repeat steps three, four, and five at least two more times. Determine the water content from each trial by using the same method used in the first laboratory. Remember to use the same balance for all weighing.

DATA Plastic Limit

Sample no. Moisture can + lid number MC = Mass of empty can + lid

Unit

1

2

3

4

42.66

42.93

42.79

43.46

MCMS = Mass of can + lid + moist soil

g 48.04

46.96

46.57

47.42

MCDS = Mass of can + lid + dry soil

g 46.34

45.65

45.33

45.99

MS = Mass of soil solids MW = Mass of pore water W = Water content

g

3.68

2.72

2.54

2.53

g

1.70

1.31

1.24

1.43

%

46.20

48.16

48.82

56.52

Average water content

%

50

g

DISCUSSION Based on this laboratory, the objective of this experiment is to determine the plastic limit of a soil sample. The plasticity index can be calculated by dividing mass of pore water (MW) by the mass of soil solids (MS), and multiply by 100. Mass of pore water (MW) * 100 Plastic Limit = Mass of soil solids (MS) Next, the plasticity index (PI) can be calculated from the value of plastic limit (PL). Plasticity index of a soil is the numerical difference between the liquid limit and the plastic limit. It is the moisture content at which the soil is in a plastic state.

CONCLUSION In conclusion, after conducting this experiment, the plastic limit of a soil sample was determined. The type of soil that was used during this experiment was graded as clay, with low plasticity according to the British Soil Classification System....