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A laboratory exercise on sieve tests for determining the particle size distribution of aggregates and fillers. It covers the main principles, materials and equipment required, sample preparation, and the step-by-step dry sieving method. The exercise includes calculations to determine the percentage of material retained on each sieve and the cumulative percentage passing each sieve. The results are then plotted on a semi-logarithmic chart to obtain the grading curve. This laboratory exercise is designed to provide students with hands-on experience in the fundamental techniques used to characterize the particle size distribution of construction materials, which is crucial for understanding their properties and performance in various applications.
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Name: Date: Block: Schedule: Group Members: Objective: The particle size distribution of samples of aggregates and fillers are done by sieving. Main Principles: For coarse and fine aggregates free from particles, which cause agglomeration, Dry Sieving may be performed. Materials and Equipment: ๏ท Test sieves with diameter 450 mm or 300 mm; 75 mm, 63 mm, 50 mm, 37.5 mm, 28 mm, 14 mm, 10 mm, 6.3 mm, 5 mm ๏ท Lids and receivers ๏ท A balance readable and accurate to 0.5 g ๏ท Riffle boxes ๏ท Metal containers ๏ท Metal trays ๏ท Scoop ๏ท Sieve brushes ๏ท Mechanical sieve shaker (optional) Sample Preparation: Dry the test portion by heating at a temperature of 105ยฐC for minimum of 12 hours. Allow to cool, weigh and record as m 1.
DRY SIEVING METHOD โ Test Procedure
Cumulative percentage passing 75 mm 63 mm 50 mm 37.5 mm 28 mm 20 mm 14 mm 10 mm 5 mm 2 mm Total mass