geotactical engineering lab report

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Procedures B D Graduated cylinder Mold Braight adiga singan FEE Three equal layers Compact each layer by 25 times Water Content of Soil MW w(%) = X 100 Ms Amount of water to add (Msin lb)xw Mw(in ml) = (M3 (1.00 (453.69 Moisture content of soil Soil S1 S2 S3 S4 Section 001 001 002 Group A, B, C D, E, F A, B, C D, E, F Gs 2.7 2.6 2.7 2.9 w(%) 1.5 1.9 1.9 2.2 002 Lab 5. Standard Proctor Compaction Test (Lab10 in 9th, Lab 12 in gth) * The degree of compaction of a soil is measured by its dry unit weight(yd). The dry unit weight of compaction increases as the moisture content increases until w=wopt. Beyond w=wop, any increase in moisture content tends to reduce the dry unit weight. * Used to determine the optimum moisture content at which a given soil type will become most dense and achieve its maximum dry unit weight 120 116 Taty=114.2 lb/ -2. -2.68 112 Dry unit weight, Y.(bit) 108 104 Optimum moisture content -12% 12 14 18 Moisture content, w (%) Figure 10-6 Plots of ya vs. w(%) and yzay vs. w%) For test results reported in Tables 10-1 and 10-2 100 10 Start the experiment by adding water to bring the moisture content up to about 15% and then increase the moisture content by 2 % for each trial The first trial Wadded(%) = 15% - w(%) If M. = 6 lb and w=2.7%, Wadded(%) = 12.3% 76 x 12.3 (453.6g 100 1 lb Mw = ( x 02.3) (453.69) = 334.8G 335ml * From the second trial, Wadded(%) = 2% * Continue the test until at least two successive down readings of W2 (weight of mold+base plate+moist soil) are obtained. * Lab Report (see section 10.8 in your textbook) Results section should include data tables for compaction test and for zero-air-void unit weight calculation, sample calculations, and the graph for plots of yd and Yzay VS. W. Report ya(max) and Wopt. In discussion section, estimate Yd(max) and wope using Eqs. (10.8) and (10.10) and compare with those obtained from the lab. Discuss any discrepancy between the observed and estimated values. Discuss any sources of error. Standard Proctor Compaction Test Determination of Dry Unit Weight Description of soil Sample no. Location 5.5 Weight of hammer lb Volume of mold Liquid Limit Plasticity index 25 Number of blows/layer Number of layers Date 10/30/2018 Tested by Test No. 1 2 3 4. 5 6 1. Weight of mold and base plate, W. (lb) 2. Weight of mold and base 9.17 4.17 9179.17 9.1 plate+ moist soil, W3 (lb) 13.9313.6 13.47 13:43 14.254.51/4,3 4.26 3. Weight of mois soil. W, - W (lb) 4. Moist unit weight W - W Y- (b/n) 1/30 5. Moisture can sumber 6. Mass of moisture can. M3 (8) 2. 5 1 63.70 3 4 23162.1962.83 62.29 /6212 7. Mass of can + moist soil, 19.1.59176.8 ) 18171 133]|| 8. Mass of can+dry soil. Ms (8) 9. Moisture content, MA - MS w(5) x 100 Ms - M 10. Dry unit weight of compaction, (lb/t") = 1+ (w (5)/100) copyright Oxford University Press Hylsule 1073/2014 Test No. 3 6 (C. 19.17 412 9.17 Item 1 2 1. Weight of moll and base plate. Wi (lb) 9.17 9.12 2. Weight of mold and base plate + moist soil. Wz (lb) 13.43 (3.63 13.47 3. Weight of moist soil, W- W (lb) 4.26 4.51 4.3 4. Moist unit weight, W2 - W (1b/tt1) 1/30 ya 1 2 3 4 5 163.79 62.19 62.83 62.29 |62.12 IMG_20181... 147.59 176.51 151.77 5. Moisture can number 6. Mass of moist.ire can. My (8) 7. Mass of can + moist soil. Mi (8) 8. Mass of can+dry soil, Ms (g) 9. Moisture content. Ma - Ms Ms - Mi 10. Dry unit weight of compaction. Yx (Ib/tr) = 1139.98 164.75 141.13 |123.67 x 100 4:35 Search х
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