Sieve Analysis

EXPERIMENT

:2

TITLE

: SIEVE ANALYSIS

1.0 INTRODUCTION A sieve analysis is a practice or procedure are use to assess the particle size distribution of a granular material. The size distribution is often of critical importance to the way the material performs in use. A sieve analysis can be performed on any type of non-organic or organic granular materials including sands, crushed rock, clays, granite, coal, soils, a wide range of manufactured powders, grain and seeds, down to a minimum size depending on the exact method. Being such a simple technique of particle sizing, it is probably the most common. 2.0 OBJECTIVE The sieve analysis determines the grain size distribution curve of soil sample by passing them through a stack of sieves of decreasing mesh opening sizes and by measuring the weight retained on each sieve.

3.0 THEORY The suitability of a soil for a particular use in construction is often dependent on the distribution of gain sizes in the soil mass. There are two tests used to analyze the particle – size distribution in a soil. One of these methods is the sieve and analyze. The test is a fundamental requirement for identification and for specification compliance testing for coarse soils.

4.0 APPARATUS 4.1 Sample of Soil 4.2 Sieve 4.3 Mechanical Shaker GEOTECHNIC LABORATAORY REPORT| 1

4.4 Hammer 5.0 APPARATUS FIGURE

Figure 5.1 Sample of Soil

Figure 5.2 Sieve

Figure 5.3 Mechanical Shaker

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Figure 5.4 Hammer

6.0 PROCEDURE

1. Oven dry the sample, allow it to cool and measure its weight (250 gram). 2. Use the mortar and pestle to break down the aggregations into individual particles. The

pressure required to achieve this disaggregation should be minimized to avoid breaking the solid particles themselves. 3. Select a stack of sieves suitable to the soil being tested. A stack of six or seven sieves is

generally sufficient for most soil and applications. The top sieves soil should have and opening slightly larger than the largest particles. Arrange the stack of sieves to that the largest mesh opening is at the top and smallest is the bottom. GEOTECHNIC LABORATAORY REPORT| 3

4. Attach a pan at the bottom of the sieve stack. Pour the sample on the top sieve. Add the cover plate to avoid dust and loss of particles while shaking. 5. Place the stack of sieves the mechanical shaker and shake for about 5 minutes. 6. Remove the stack of sieves from the shaker. Beginning with the top sieve, transfer its

contents to a piece of the paper or a larger recipient. Carefully empty the sieve without losing any material and use a brush to remove grains stuck in its mesh opening. Measure the weight of soil retained in each sieve and note the corresponding sieve mesh opening and number. 7. Repeat step 6 for each sieve. As a preliminary check, the weight retained on all the sieves and the bottom pan are added and their sum is compared the initial sample weight. Both weights should be within about 1 % if the difference is greater than 1% too much material was lost and weighting and or sieves should be repeated.

7.0 SAFETY PRECAUTION 7.1 When sieve analysis is running someone should tight the lock at the sieve analysis.

8.0 RESULT Total Mass of Dry Sample: 250 gram

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Sieve

Weight of

Weight of

Mass

Mass

Percent

BS

Sieves +

Sieves

Retained

Passing

Finer (%)

Soil (gram) 3.001 g

(gram) 379.06

(gram) 112.7

(gram) 138.28

55.50

1.180

3.589 g

351.38

102.04

36.24

14.50

0.500

0.588 g

307.55

34.91

1.33

0.53

0.425

3.585 g

294.90

0.400

0.93

0.37

0.300

0.584 g

281.74

0.680

0.25

0.10

0.212

0.059 g

279.89

0.160

0.09

0.04

0.150

0.526 g

268.55

1.090

0

0

0.075

10.103 g

257.17

0

0

0

429.38

429.38

0

0

0

(mm) 2.360

Pan

Total Mass (gram)

250.45

9.0 CALCULATION Uniformity Coefficient (Cu)

Coefficient of Curvature (Cc)

Cu = D60

Cc= D302 GEOTECHNIC LABORATAORY REPORT| 5

D10

10.0

DISCUSSION

11.0

CONCLUSION

D10D60

In conclusion, we can know the type of soil at the place with use the Sieve Analysis Test and depend to the sample of soil trough the sieve. Depend to size of sieve (mm) and percentage passing (%), we can plot the sieve analysis graph to know the type of soil. Besides that, with determine the Uniformity Coefficient (Cu) and Coefficient of Curvature (Cc) we also can know the grade of soil is good, not good or constant soil.

12.0

REFRENCES

12.1

Civil Engineering Laboratory 2 Report, C3003.

12.2

http://en.wikipedia.org/wiki/Sieve_analysis

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