03 Sieve Analysis of Aggregates

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DEPARTM ENT OF CIVIL ENGINEERING Materials of Construction and Testing

EXPERIMENT 3: SIEVE ANALYSIS OF FINE AND COARSE AGGREGATE 3.1.

Program Outcomes (POs) Addressed by the Experiment a) Ability to design and conduct experiments, as well as to analyze and interpret data. b) Ability to function on multidisciplinary teams.

3.2.

Experiment’s Intended Learning Outcomes (EILOs) At the end of this experiment the student shall be able to: a) Apply appropriate ASTM/AASHTO standards in sieve analysis of aggregate. b) Calculate the fineness modulus of fine aggregates. c) Identify the application of particle size distribution of coarse and fine aggregates particularly in concrete mix design.

3.3.

Objectives of the Experiment The objective of this experiment is to determine the particle size distribution of coarse and fine aggregates by sieving

3.4.

Principle of the Experiment This test method is used primarily to determine the grading of materials proposed for use as aggregates or being used as aggregates. The results are used to determine compliance of the particle size distribution with applicable specification requirements and to provide necessary data for control of the production of various aggregate products and mixtures containing aggregates. The data may also be useful in developing relationships concerning porosity and packing.

Fineness Modulus (FM) is used in determining the degree of uniformity of the aggregate gradation. It is an empirical number relating to the fineness of the aggregate. The higher the FM is, the coarser the aggregate is. (

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Note: Do not include the mass (weight) of the container used in the computation. 3.5.

Materials / Equipment Balance Sieve Mechanical Sieve Shaker Source of Heat (Oven / Stove) Container Scoop / Hand Shovel

Source of Heat (stove / oven) Container Scoop/Shovel Gloves Labeling Devices

3.6. Procedure 1. Take a representative of oven dried sample of coarse and fine aggregates (preferably samples used in the previous experiment, Moisture Content of Fine and Coarse Aggregate.

2. Weigh the mass of coarse and fine aggregates separately.

3. Weigh the mass of each sieve including the pan (making sure sieves are clean and free from any other particles).

4. Prepare a stack of sieve where sieves having larger openings (with lower numbers) placed above sieves with smaller openings. The bottommost part should be a pan to collect portions of aggregates passing the 3/8” and #100 for coarse and fine aggregates respectively.

5. Pour the coarse (fine) aggregates into the stack of sieve and cover it. Let one of the members of the group shake the stack for 3 minutes, making sure the sieves are tightly secured and sealed to each other.

6. Record the mass (weight) of each sieve + aggregates including those on the pan. 7. Calculate the mass (weight) retained, cumulative mass (weight) retained, percentage retained, cumulative percentage retained and the percent passing. Note: The total mass of the coarse (fine) aggregates after sieving should be check closely with the original mass (weight) of the sample placed on the sieve. If the amounts differ by more than 0.3% based on the original dry mass sample, the result should not be used for acceptance purposes 3.7. Activity Report Course: CEMATCONSLAB Group No. 2 Group Members: ESPINA, Paul Kenneth R. MIRAL, Donna Lyn R. RIVERA, Princess Dhiame R. TAPADA, John Robert P.

Experiment No.: 3 Section: V31A Date Performed: Dec 14 2017 Date Submitted: Jan 04 2018 Instructor: Engr. Jenereth Almiendo

3.7.1. Data and Results Table 1: Coarse Aggregates Sieve Size

3” 1 ½” 1” ¾” 3/8”, 1 ½” #4 Pan Total

Weight of Sieve (grams) 508 538 518 552 1,084 510 364 2,000

Weight of Sieve + Aggregates (grams) ---610 1,280 -800 2,690

Weight Retained

Percentage Retained

(grams) ---58 196 -436 690

(%) ---8.406 28.406 -63.188

Cumulative Percentage Retained (%) ---8.406 36.812 -100

Percent Passing (%) ---91.594 63.188 -0

Note: Maximum Size Aggregates is the size of sieve next above the largest sieve that has 15% of the sample coarser than it (cumulative percentage retained)

Table 2: Fine Aggregates Sieve Size

Weight of Sieve

3/8” #4 #8 #16 #30 #50 #100 #200 Pan Total

(grams) 546 510 484 430 402 370 354 310 364 3,224

Weight of Sieve + Aggregates (grams) -510 514 494 514 496 440 346 376 3,690

Weight Retained

Percentage Retained

(grams) -0 30 64 112 126 86 12 36 466

(%) -0 6.438 13.734 24.034 27.039 18.455 2.575 7.725

Cumulative Percentage Retained (%) -0 6.438 20.172 44.206 71.245 89.7 92.275 100

Percent Passing (%) -100 93.562 79.828 55.794 28.755 10.3 7.725 0

3.7.2. Calculation (

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CA: ¾” 3/8”, 1 ½” Pan

|552g – 610g| = 58g |1,084g - 1,280g| = 196g |364g – 800g| = 436g

#4 #8 #16 #30 #50 #100 #200 Pan

|510g |484g |430g |402g |370g |354g |310g |364g

FA: – 510g| – 514g| – 494g| – 514g| – 496g| – 440g| – 346g| – 376g|

= 0g = 30g = 64g = 112g = 126g = 86g = 12g = 36g

CA: ¾” 3/8”, 1 ½” Pan

100% * 58g / 690g = 100% * 196g / 690g = 100% * 436g /690g =

8.406% 28.406% 63.188%

#4 #8 #16 #30

100% * 0g / 466g = 100% * 30g / 466g = 100% * 64g / 466g = 100% * 112g /466g =

0% 6.438% 13.734% 24.034%

FA:

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#50 #100 #200 Pan

100% * 126g /466g = 100% * 86g / 466g = 100% * 12g /466g = 100% * 36g /466 g

27.039% 18.455% 2.575% 7.725%

¾” 3/8”, 1 ½” Pan

8.406%= 28.406% + 8.406% = 63.188% + 36.812% =

#4 #8 #16 #30 #50 #100 #200 Pan

0% = 0% + 6.438% = 13.734% + 6.438% = 24.034% + 20.172% = 27.039% + 44.206% = 18.455% + 71.245% = 2.575% + 89.7% = 7.725% + 92.275% =

0% 6.438% 20.172% 44.206% 71.245% 89.7% 92.275% 100%

¾” 3/8”, 1 ½” Pan

100% - 8.406% = 100% - 36.812% = 100% - 100% =

91.594% 63.188% 0%

#4 #8 #16 #30 #50 #100 #200 Pan

100% 100% 100% 100% 100% 100% 100% 100%

100% 93.562% 79.828% 55.794% 28.755% 10.3% 7.725% 0%

CA: 8.406% 36.812% 100%

FA:

CA:

FA: - 0% = - 6.438% = - 20.172% = - 44.206% = - 71.245% = - 89.7% = - 92.275% = - 100% =

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CA: ¾” 3/8”, 1 ½” Pan

8.406% / 100% = 36.812% / 100% = 100% / 100% =

0.084 0.368 1

FA: #4 #8 #16 #30 #50 #100 #200 Pan

0% / 100% = 6.438% / 100% = 20.172% / 100% = 44.206% / 100% = 71.245% / 100% = 89.7% / 100% = 92.275% / 100% = 100% / 100% =

0 0.064 0.202 0.442 0.712 0.897 0.923 1

3.7.3. Observation The experiment instructed the students in determining the size of the aggregates, as well as the percentage of the particles that the supply would be composed of. The students were able to accomplish these by taking a sample from the supply, and pouring it in the stack sieves. The sieves were then shaken for 3 minutes, or more. The aggregates of coarser size remained on top of stack, while the finer settled below. Computations were made for the percentage of aggregates retained in each sieve. The result would show its components as a whole, and would aid in deciding the proper uses for the specific supply in a structure. To check, the students gathered the weight of all aggregates in each pan. The weight before and after the separation were the same. 690g for coarse aggregates, and 466g for fine aggregates.

3.7.4. Conclusion/s Aggregates of different sizes have different uses. To separate the aggregate sizes, sieve analysis must be done. After shaking the sieve, the coarse and fine aggregates were separated. The coarser remains on top of stack because it cannot pass through sieves of smaller holes than its size. Finer, on the other hand, passes through the sieves on top of stack because it gets into the holes of larger size than what it has. The summed up mass of aggregates in all sieves and pan should be equal to the total mass of aggregate sample before it is separated into different sizes.

3.7.5. Rating

3.8.

References

ASTM C136. (1996). Standard Test Method for Sieve Analysis of Fine and Coarse Aggregates. West Conshohocken, PA: ASTM International.