SAND TESTING PREPARATION

1

Introduction

Objective

This experiment measures the sand grain size and calculates the Grain Fineness Number (GFN)

Materials

i. Silica sand

Equipment

i. 1 set of 9 sieves ( 53, 75, 106, 150, 212, 300, 425, 600, 850) plus the sieves panii. Sieve shaker

iii. Digital Scale Balance

Hand tools

i. Brush

Procedure

a. The screens on the sieves were cleaned carefully by turning the sieve face down and striking the rim evenly on the table. The screen cannot be touch by the fingers. The sieves also do not beat hard so as not to damage the rim.

b. The sand sample was scales 100 grams to accuracy of 0.01 grams.c. The stack of sieves was place on the Sieve Shaker Octagon 2000 machined. The biggest mesh size was put on the top sieve of the sieve shaker.e. Silica sand was put into the sieve.f. The sieves were shaken continuously for a period of 15 minutes.g. The sieves were taken apart after the shaking operation and left over sand of each sieve

was carefully weighted. The weight was recorded in column (C) of table 1.h. Grain Fineness Number (GFN) was calculated by the formula given.

Apparatus

Figure 1 : Sieve Shaker

Figure 2 : Digital Scale Balance

Figure 3 : Silica Sand

Figure 4: The Cover of Sieve Shaker

Figure 5 : The silica sand after shaking

Result and Data collection

A B C D E FNo

Sieve No Opening (Mic.) Sand mass (g) Sample (%)AFS

MultiplierAFS Product

(C X E)1 20 850 0.3 0.303 10 3.002 30 600 1.81 1.829 20 36.203 40 425 39.55 39.954 30 1186.504 50 300 18.18 18.366 40 727.205 70 212 5.56 5.617 50 278.006 100 150 11.88 12.001 70 831.607 140 106 13.90 14.042 100 1390.008 200 75 6.53 6.597 145 946.859 270 53 1.92 1.939 200 384.0010 PAN 0.37 0.374 300 111.00

Total accumulated sand mass (g) Σ C = 100 100%Σ F =

5894.35Original Mass of Sample before

Seiving (g)100

Table 1: Sieve Analysis Data

Graph 1

Graph 2

Calculation

GFN = Σ F X 100%

Σ C

GFN = 5894.35 X 100%

100

= 5894.35

Discussion

Conclusion

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