Lab #9

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CMCET 337 CONSTRUCTION MATERIALS TESTING AND INSPECTION LAB #10 SIEVE ANALYSIS OF FINE AND COARSE AGGREGATES BRANDEN MONTALVO GROUP 2C BRALEN BOWKER LAB DATE: 11/27/2023

PURPOSE The purpose of determining the sieve analysis of the fine and course aggregates is because it provides information regarding the particle size of the material. This particle size must be checked and fit the specifications of ASTM C33. REFERENCES ASTM C 702-90 ASTM D 75-87 ASTM C 33-90 ASTM C 136-93 APPARATUS To determine the sieve analysis, the following items are needed. Drying Pan Balance Oven Straight edge Sieves: 1.5” 1” ¾” ½” 3/8” #4 #8 Sieve pan Sieve lid Procedure Fine Aggregate: Reducing the Sample

1. Since the nominal maximum size of the fine aggregate contained in the bins is 4.75mm (No. 4), the mass of the test sample must be a minimum of 500 grams. Obtain three approximately equal random samples from the bin and combine to form a field sample that has a mass two times greater than the test sample. 2. Place the field sample on a flat, clean surface where the material will not be lost or introduced to foreign material. 3. Mix the sample by turning it over three times. On the last turning, shovel the sample into a conical pile by placing each shovel full on top of the preceding one. 4. Flatten the pile into a uniform thickness and diameter. The diameter of the pile should be approximately four to eight times the thickness. Divide the pile into four equal quarters. 5. Retain the two opposite quarters and dispose of the other two to obtain the test sample. 6. Weigh the EMPTY test sample container and record weight. 7. Weigh the initial test sample and container and record weight. 8. Record the original weight of test sample. 9. Dry and test sample in an oven or on a hot plate capable of maintaining a uniform temperature of 110+/- 5 degrees C. 10. After the sample is completely dry, record the weight of the sample and container and figure the original dry weight of sample. 11. Calculate the moisture content of the aggregate. Sieving 1. Arrange a nest of sieves in the order outlines in the fine aggregate sieve analysis data sheet. 2. Place the sample in the top sieve, cover it, and place the nest in the mechanical sieve shaker. 3. Turn the shaker on for approximately six minutes. 4. Separate the next and weigh the amount of material retained on each sieve. Record these values as the individual grams retained on the Fine Aggregate Data Sheet. 5. Complete the fine aggregate analysis graduation chart. 6. The fineness modulus will be a parameter used in the mix design calculations in Lab #10. 7. On the Aggregate Grading Chart provided, plot the cumulative percent passing and the allowable ASTM standards. Coarse Aggregate: 1. Reduce a field sample of coarse aggregate to a minimum 2.5 pound test sample in the same manner as outlined above, but there will be no drying. 2. Arrange a nest of sieves in the order outlined in the coarse aggregate sieve analysis data sheet. 3. Place the sample in the top sieve, cover it, and place the nest in the mechanical sieve shaker. 4. Turn the shaker on for approximately six minutes.

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5. Weigh the amount of material retained on the Course Aggregate Data Sheet. 6. On the Aggregate Grading Chart provided, plot the cumulative percent passing and the allowable ASTM limits for each sieve size. Compare your results to the acceptable ASTM standards. Both the fine and coarse aggregate will be plotted in the same graph.

Data In the lab, Brayden and I were able to use the data we collected to create Table 1.1: Table 1.1 Using Table 1.1, we were able to take the data and draw on the Aggregate Grading Chart to create Figure 1.1: Figure 1.1

Conclusion Based on the results from the Aggregate Grading Chart, I compared ours to the chart that was created as a class, and the results are very similar. Discussion Questions 1. Did your sample fall within the ASTM C33 Limits for coarse and fine aggregate? If so, how do you know? If not, why? The results between the standard and my lab group look similar. I would say that our sample does fall within ASTM C33 Limits because of this.

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