Lab 4 - Lab testing report PDF

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MTR241-NCD

LAB REPORT-4 WINTER 2020 WASHED SIEVE ANALYSIS

Specification:  Fine Aggregate: Sieve 9.5mm 4.75mm 2.36mm 1.18mm 600µm 300µm 150µm

Percentage Passing 100 95-100 80-100 50-85 25-60 10-30 2-10

(Not over 45% passing any sieve shall be retained on the next consecutive sieve.) (b) Fineness modulus shall be between 2.3 and 3.1. (c) Not over 5% finer than 75µm (3% for concrete subjected to abrasion). Procedure: 1. Oven-dry the sample at 1100C ± 50C and measure the mass. 2. Wash, pouring the wash water over a 75µm sieve. Continue until the water is clear. Return any coarse material in the sieve to the sample. 3. Dry the washed sample at 1100C ± 50C. 4. Place the sample in a nest of sieves and shake for 20 minutes. 5. Obtain the mass retained on each sieve. Note that the total mass passing the 75µm sieve is the sum of the amount washed through the sieve and the amount passing the 75µm sieve on dry sieving. Exercise 1: A) Prepare a sample for wash sieve analysis and weigh the total sample. B) Sieve the dried sample for 5 minutes and measure the sample mass retained in each sieve size. C) Record your findings in a table as outlined below. D) Determine the margin of error. E) Plot the cumulative % finer values obtained against their respective soil sizes on a semilogarithmic graph (one axis) with the sieve sizes on the log scale and cumulative % finer values on the linear scale. F) Determine fineness modulus G) Give a recommendation on the suitability of your sample for use in concrete.

Sample Description: Sampel Description 1|Page

Photo of Dry Sample

MTR241-NCD

LAB REPORT-4 WINTER 2020

WASHED SIEVE ANALYSIS Dry Sample Weight = 251.50gm Colour= Yellowish Brown Angularity= Sub-Angular Texture= Well-Graded

Data and Analysis:  Data and Calculations of every sample is mentioned in Appendix 2- Data and Calculation.

Result:

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MTR241-NCD

LAB REPORT-4 WINTER 2020 WASHED SIEVE ANALYSIS

SIEVE ANALYSIS Lab Exercise No.: 4

Date: 30th / Jan./2020

Sample: Fine Aggregates

Group Members: Harshil, Krunal, Aniket, Sukhpreet, Harinderpal. Washed Mass Mass of unwashed sample

225.2 g

Dried, washed mass + container 329.09 g

Dry mass of washed sample 251.40 g

Mass of container

Mass lost in washing

Dry mass of washed sample

Sieve Size

3.8 g Dry Sieving Cumulative Cumulative

(mm) 9.50 4.75 2.36 1.18 0.600 0.300 0.150 0.075 Pan

Retained 0 0 0 4.68 106.98 227.18 249.54 251.20 251.50

% Retained 0 0 0 1.83 41.92 89.02 97.78 98.43

77.69 g

Total %

Limits

Passing 100 100 100 98.17 58.08 10.98 2.22 1.57

100 95-100 80-100 50-85 25-60 10-30 2-10

251.40 g Remarks

Meets Meets Meets Not Meets Meets Meets Meets

120 100

% Passing

80 60 40 20 0

0

0.01

0.1

1

10

100

Siev SIze

Recommendation:  Fineness Modulus of Fine Aggregate should be between range of 2.2 – 2.6 and we got 2.3. So the type of sand is Fine. This sample can be used in construction.

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MTR241-NCD

LAB REPORT-4 WINTER 2020 WASHED SIEVE ANALYSIS

Conclusion:  Given sample meets all specification, except % passing of 1.18mm sieve is greater than it’s specification.

Appendix 2- Data and Calculations

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MTR241-NCD

LAB REPORT-4 WINTER 2020 WASHED SIEVE ANALYSIS

 Calculations:  Total Actual Mass of unwashed sample= 251.50+3.8= 255.3 g  Margin of error = Measured Mass of unwashed sample-Actual Mass of unwashed sample x 100 Measured mass of unwashed sample = 255.2-255.3 x 100 255.2 = 0.039%



Fineness Modulus = Σ Cumulative % retained on 9.5mm - 150µm sieves (exclude 0.075µm) 100 = 230.55 100 = 2.30 [ Range between 2.2 – 2.6 ], So the type of sand is Fine.

 % Fines= 3.8+0.3 * 100 255.2 = 1.61%

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