# Sieve Analysis

Practical 1.1

Objectives: 1. To plot grading curves and calculate the fineness modulus of a coarse aggregate sample and compare the results with B. S. 882. Apparatus: 1. Sieve shaking machine 2. Sets of sieve to B. S. 410 comprising: 1” (25mm), ¾” (20mm), ½” (14mm), 3/8” (10mm), 3/16 (5mm)” 3. Weighing machine Materials: 1. Dry coarse aggregate Procedures: 1. Weigh out 2000g of coarse aggregate . For moist sample, dry at 105ºC in an oven. 2. Arrange the stack of sieves so that the largest 1” is at the top and the smallest 3/16” (5mm) is at the bottom. 3. Place the sample on the top sieve, place the stack of sieve on the sieve shaking machine. Tighten the cover plates and set the timer to 15 minutes after switching on the machine. 4. Weight the material retained in each sieves and then calculate the percentage by weight of the total sample passing through each sieve. 5. Calculate the fineness modulus and average sieve size. 6. Plot the grading curve.

Results: B. S. Sieve Size 1”

3

Wt. of Material retained on each sieve (g)

Wt of materials retained on each sieve (%)

Cumulative % of Coarser

Cumulative % of Finer

/4”

½”

3 3

/8”

/16”

Pan N. B. The fineness modulus (F.M) is calculated by adding the percentage cumulative retained on the sieve and dividing the sum by 100.

Practical 1.2

: Determination of particle size distribution and classification of fine aggregate by sieve analysis.

Objectives: 1. To plot grading curves and calculate the fineness modulus of a fine aggregate sample and compare the results with B. S. 882. 2. To classify a given sand sample by sieve analysis in order of their fineness i.e. coarse sand – zone 1; medium sand – zone 2; medium fine – zone 3; fine sand – zone 4 The upper and lower limits for sand...

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