2. Fewer processes are performed. 3. Drying step is eliminated. 4. Safe application to the environment. 5. Uniform distribution of the particles. Disadvantages of hot melt process: 1. It is a high energy input process. 2. The process could not be applied to thermolabile drugs. Rumpf iii-iv classified the mechanisms of agglomeration binding into: 1. Nucleation of primary particles (Figure 1A): as the system temperature raised to about 2/3 of the melting temperature of solids - by heat introduced
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is to determine the particle size distribution of the fine and coarse aggregates by sieving. Equipment and Material Balance‚ sensitive to within 0.1% of the weight of the sample to be tested Standard sieves for grading of fine aggregates- 4.75 mm‚ 2.36 mm‚ 1.18 mm‚ 300m‚ 150m (# 4‚ 8‚ 16‚ 50 and 100) Standard sieves for grading coarse aggregates- 1 ½ in.‚ 1 in.‚ ¾ in.‚ ½ ‚ 3/8 in.‚ 4 in‚ plus a 4.75 mm(#4 sieve) Fine (0.5 Kg) and coarse (2 to 20 Kg depending on maximum size from 9.5mm to 50 mm
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EXPERIMENT TITLE : PARTICLE SIZE ANALYSIS (SIEVING METHOD) OBJECTIVE : To determine the particle size distribution of a soil sample by sieving process. This analysis can be used to predict ground water movement and soil classification. THEORY : Particle size distribution analysis is used in engineering soil classification universally. This is because the particle size plays an important role in the selection of soil in construction. It is also used to predict soil water movement. This analysis
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Machine essential dimensions complying with Figure 2. Worksheet‚ MRD 1165 (recommendation only) 7. PROCEDURE 1 Obtain a test sample taken in accordance with Test Method WA200.1. 2 Select a grading defined in Table 1 appropriate to the particle size distribution of the test sample. 3 Wash the test sample by agitation under running water for approximately ten minutes. 5 Dry the test sample to constant mass (Note a)‚ in an oven at a temperature within the range of 105°C to 110°C‚ cool to room
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a mass of dispersed soil particles of various shapes and sizes. Larger particles settle more rapidly than the smaller ones. The hydrometer analysis is an application of Stokes’ law that per- mits the calculation of the grain size distribution in silts and clays‚ where the soil particles are given the sizes of equivalent spherical particles. The density of a soil-water suspension depends upon the concentration and specific gravity of the soil particles. If the suspension is allowed
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TEST METHOD FOR THE GRAIN-SIZE ANALYSIS OF GRANULAR SOIL MATERIALS GEOTECHNICAL TEST METHOD GTM-20 Revision #4 GEOTECHNICAL ENGINEERING BUREAU APRIL 2007 NEW YORK STATE DEPARTMENT OF TRANSPORTATION GEOTECHNICAL TEST METHOD: TEST METHOD FOR THE GRAIN-SIZE ANALYSIS OF GRANULAR MATERIALS GTM-20 Revision #4 STATE OF NEW YORK DEPARTMENT OF TRANSPORTATION GEOTECHNICAL ENGINEERING BUREAU APRIL 2007 EB 07-039 Page 1 of 13 TABLE OF CONTENTS 1. 2. 3. 4. 5.
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aggregate sample only. In determining the SSD and oven-dry weights needed for calculation of specific gravities‚ a conical mold was used to reach an SSD condition and the sample was later dried in an oven. Sieve analysis determined the particle size distribution by sifting the aggregate through a series of eight sieves of different sixes by use of a mechanical shaker. The results found are that the aggregate used has a Bulk Specific Gravity (SSD) of 2.552‚ which indicates a normal weight‚ and
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analysis is used to determine the grain-size distribution of a soil which is similar to the sieve analysis done in an earlier lab. Hydrometer analysis can be combined with the sieve analysis to determine the amounts (percents) of fines (silts and clays) in a sample. The hydrometer analysis doesn’t require the soil to be passed through a series of sieves like in the sieve analysis. The analysis measures the rate of sedimentation. The larger the particle‚ the quicker it will fall out of sedimentation
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of them in the cement industry. Few installations have a comprehensible method of controlling and recording exactly what ball size distribution is in‚ or should be in‚ the Ball Mill. As mills are supplied for ever increasing capacities‚ the ball size distribution and wear exact a tremendous effect on the profitability of producing finish cement. Improper size distribution or filling level of the ball charge can easily reduce the efficiency of grinding (possible production rate) by 5% to 20%. Relating
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(therefore economic) key tests; 1. Particle size distribution (P.S.D.) or sieve analysis. 2. Plastic properties; Liquid limit test Plastic limit test Soil is initially classified into either coarse or fine soil on the basis of particle size. Coarse soil (Granular) Physical characteristics and appearance are influenced by the distribution of particle sizes within the soil‚ i.e.>0.063mm (1/16mm) A granular soil is classified according to its Particle Size Distribution. Fine soil (Cohesive) Physical
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