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Course: Group No.: Group Members Civil Engineering Department CE452L1/CE405 - Construction Materials and Testing Laboratory Manual Experiment No. Section: Date Performed: Date Submitted: Instructor Mass - - Civil Engineering Department CE452L1/CE405 - Construction Materials and Testing Laboratory Manual Experiment No. 1 SIEVE ANALYSIS 1. Objective(s): The activity aims to introduce the basic principle, significance and procedures for the Sieve Analysis of Aggregates (Coarse and Fine Aggregates). 2. Intended Learning Outcomes (ILOS): The students shall be able to 2.1 Familiarize with basic procedure for the Sieve Analysis of the Aggregates. 2.2 Determine the particle size distribution of the coarse and fine aggregates. 2.3 Characterize the aggregates according to the predominant grain size. 3. Discussion: As conformed in the ASTM 136-98a, the grain size characteristics of soils that are predominantly coarse grained are evaluated by a sieve analysis. A nest of sieves is prepared by staking test sieves one above the other with the largest opening at the top followed by sieves of successively smaller openings and a catch pan at the bottom. The maximum size of the aggregates depends on the type of structure for which concrete is to be used. Most of the time, the aggregates have a uniform gradation. However, gap-graded aggregates provide better strength characteristics. In gap-grading, the sizes of aggregates do not decrease uniformly. Certain size segments are left out in order to obtain better packing and hence, a more utilization of cement. 4. Resources: 1 Set of Sieves 1 Weighing Scale 1 Scoop or spoon 2 Pans Bag of Coarse Aggregates 4 Bag of Fine Aggregates 5. Procedure: Preparation of Samples 1. Gather aggregates sample (coarse and fine) weighing at least 1 kg, put each in a pan and then weigh 2. Dry the sample to constant weight at a temperature of 110-5°C; weigh after cooling to room temperature. Place sample in a container large enough and to permit spilling when water is added. 4. Add water and agitate. 5. Pour wash aggregates over the nested sieves, avoiding decantation of coarse particles, repeat operation until wash materials are clear, return all the materials retained in the nested sieves 6. Dry washed sample to constant weight and weigh after cooling at room temperature. Sieve Analysis 7. Pass the sample through the nested sieves. 8. Weigh materials retained on each sieve. 9. Calculate the cumulative percentage passing each sieve on the basis of oven-dry weight of the original sample. # 6. Data and Results: 6.1 For Fine Aggregates Sieve Cumulative Size Remarks Mass Specification Retained (g) (inch) % Passing % Retained % Passing Passing (g) 3" 24 2" 112 19 323 3/4" " 12 3/8" 100 #4 95-100 #8 80-100 #16 # 50-85 #30 25-60 #50 5-30 #100 0-10 #200 Pan Mass of Sample Mass of Oven-Dry Sample Mass of Washed Oven-Dry Sample Mass Retained at #200 Sieves Moisture Content Fineness Modulus *Calculate the fineness modulus, when required, by adding the total percentages of material in the sample that is coarser than each of the following sieves (cumulative percentages retained), and dividing the sum by 100: 150-um (No. 100), 300-um (No. 50), 600-um (No. 30), 1.18-mm (No. 16), 2.36-mm (No. 8), 4.75-mm (No. 4), 9.5-mm (38-in.), 19.0-mm (34-in.), 37.5-mm (1/2-in.), and larger, increasing in the ratio of 2 to 1 6.2 Computation 3 1 2
Civil Engineering Department CE452L1/CE405 - Construction Materials and Testing Laboratory Manual 6.1 For Coarse Aggregates Sieve Cumulative Mass Size Specification Mass Remarks Retained (9) (inch) % Passing % Retained % Passing Passing (9) 3 24 2 11 1" 100 90-100 20-55 3/8" 0.0 0-15 #4 14.8 0-5 #8 47.6 #16 117.3 #30 274.2 #50 418.8 #100 4674 #200 494.2 Pan 506.4 Mass of Sample Mass of Oven-Dry Sample Mass of Washed Oven-Dry Sample Moisture Content Maximum Nominal Size 6.2 Computation 1. Conclusion: 3
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