Triaxial Test Apparatus
Figure10.2: Triaxial Test Apparatus
Stresses The stresses acting on a Triaxial sample during the test are as shown in Figure 10.3 From vertical equilibrium we have = The term F/A is known as the deviator stress, and is usually given the symbol .
Hence we can write Figure 10.3: Stresses on a Triaxial Test Sample
The axial and radial stresses are principal stresses. The object of the triaxial test is to determine the shear strength of the soil which is obtained using the Mohr-Coulomb theory. τ = c + σtanϕ
10.2 PLANNING AND ORGANIZATION
10.2.1 Apparatus and Knowledge of Equipment
1. A constant rate
…show more content…
Triaxial cell 50 mm 1700 kPa for samples up to 50 mm. The cell has 4 drilled holes at the base and is fitted with no-volume change valve (with loading piston and specimen pedestal).
11. Specimen trimmer (electrically driven lathe type) for cohesive soils if sample is undisturbed sample.
12. Base pedestal of non-corrosive material with drilled holes for both bottom drainage and pore water pressure measurement
13. Base disc for placing over the top of the base pedestal when no drainage is required
14. Top cap of non-corrosive material for both drained and undrained testing
15. Moisture content test apparatus.
16. A balance of 250 gm capacity accurate to 0.01 gm
17. Compressed air source
18. 3.8 cm (1.5 inch) internal diameter 12.5 cm (5 inches) long sample tubes.
19. Rubber rings
20. O-rings for sealing membrane to the top cap and base pedestal
21. Porous stones (for drained test)
22. Specimen trimmer for cohesive soils
23. Cartesian graph paper of 10 divisions per centimeter
24. Specimen mold for cohesionless soils
25. Specimen mold for cohesive soils
26. Membrane stretcher for cohesive soils: allows placement of membrane around sample and placement of
…show more content…
Sand and clay soil specimens are prepared differently.
A. Sand Specimen
Cohesionless soils require special procedure to prepare the specimen for testing because it will not retain the required shape of specimen
a. install an O-ring at the bottom of the specimen pedestal
b. Place a rubber membrane in the specimen mold. Ensure surface is smooth and without wrinkle by applying a vacuum. While still applying the vacuum, insert the mold over the pedestal of triaxial cell and porous stone. Place some of the soil sample in the mold and compact it to desired density being careful not to puncture the rubber membrane.
c. Continue filling and compacting until the required specimen height is attained in the mold. Make top of the specimen flat and level. Place a porous stone on top of specimen level surface. Stop applying vacuum.
d. Take a representative sample of the soil for moisture content determination, w
e. Now place the loading cap on top of the porous stone. Roll up the top of the membrane to partly cover the sides of the loading cap and then install an O-ring over the membrane so that the membrane is tightly sealed between the O-ring and the loading
Nt1310 Unit 4 Coursework
1433 Words | 6 PagesCoursework Equipment List • Boiling tubes (8) I will use these because this is where I will mix both the sodium carbonate and the strontium nitrate in order to form the precipitate. I need 8 because I am going to add 8 different amounts of strontium nitrate (1-8cm³) to the 8cm³of sodium carbonate. • Measuring cylinder (1) I will use this to measure the 8cm³ of sodium carbonate and the varying amounts of strontium nitrate to put into the test tubes. • Sodium Carbonate (enough to fill 8 boiling tubes with 8cm³/64cm³)
Ap Euro Dbq Rock Sample
626 Words | 3 PagesRocks are intriguing to many individuals all over the world. Being made up of one or even many minerals, rocks draw an overwhelming amount of attention to themselves. When a probe brought back samples of rock from Planet X the task of identifying the rock was assigned. With no prior knowledge of the type of rock presented one will need figure out the identity of the rock based only on its density and physical properties. With an experimental process, one will begin to compare and uncover the identity of the rock samples brought back.
The Crucible: Three Boiling Chips
292 Words | 2 PagesNow, they are ready to start the lab. The empty crucible is weighed by and the weight was recorded. Then the students used a disposable pipet and put close to 4.0 grams of their milk sample in their crucible on the scale. The crucible was then placed back on
Copper Transformation Lab Report
1931 Words | 8 PagesFor this I needed to first obtain deionized water. I cleaned my large graduated cylinder and got 20 + or - 2 mL of deionized water. I then added this water to the beaker that contained the mixture I created from the last step of the experiment. I also gathered 2 boiling stones and added them to the mixture of the last step. I placed the beaker on a hot plate and heated it up to 130 degrees Celsius.
Tlc Lab
908 Words | 4 PagesThe resin that had stuck to the sides of the burette was washed down by pipetting extra pH 3 citrate buffer along the sides. The column was tapped to ensure that the settled resin formed a level surface. After all of the resin settled, the buffer was drained into a waster beaker until the level of the buffer reached the top surface of the resin. For the remainder of the experiment, the top surface of the resin was not allowed to dry
Percent Cu2 + In A Mineral Sample
931 Words | 4 PagesThen the flask was filled the rest of the way with distilled water to the mark. Similar steps were taken for the rock solution. The rock solution from the prior lab was filtered into a volumetric flask (100mL), then 15 M NH4¬OH (8mL) was added to the flask. After that, the flask was filled to the mark with distilled water. Both flasks were then swirled to combine the solution
Hydrates Lab
737 Words | 3 PagesProcedure and Observations To begin the lab, first all the correct equipment and materials had to be collected
Lab Report Limiting Reagents
872 Words | 4 PagesNext, this test was repeated for tubes C-E. Following the completion of the tests, all test tubes, pipets, and well plates were cleaned out and liquid waste was disposed of in the proper container. Once all data was collected, results were shared in class. Following this, all previous steps were repeated for the second and third stage. Following the end of all 3 stages.
Tlc Lab Report
771 Words | 4 PagesThe column was gently tapped to remove air pockets after adding the sand and alumina. The chromatic column was pre-wetted with CH2Cl2 (about 3 mL) until it began to drip. About 1 mL of the unknown was added to the column and the level of the solution in the column was allowed to descend to the top of the alumina. It was made sure that the solvent level did not drop below the alumina layer. Once the level of the sample reached the top of the alumina, CH2Cl2 was carefully added to the column without disturbing the sand or alumina.
Mole Mass Lab Report
372 Words | 2 PagesI. Purpose: To experimentally determine the mass and the mole content of a measured sample. II. Materials: The materials used in this experiment a 50-mL beaker, 12 samples, a balance and paper towels. III.
Nt1310 Unit 5 Lab Report
265 Words | 2 Pages\section{Facility Static and Dynamic Control}\label{Calibr} The facility calibration is the transfer function between the oscillating gauge pressure $P_C(t)$ in the chamber (described in ~\autoref{Sub31}) and the liquid flow rate $q(t)$ in the distributing channel, i.e. the test section. Due to practical difficulties in measuring $q(t)$ within the thin channel, and being the flow laminar, this transfer function was derived analytically and validated numerically as reported in ~\autoref{Sub32} and ~\autoref{Sub33}. \subsection{Pressure Chamber Response}\label{Sub31} Fig.\ref{fig:2a} shows three example of pressure signals $P_C(t)$, measured in the pneumatic chamber.
Lab Report Spectrophotometry Lab
851 Words | 4 Pages7) Test tube four contains 7 mL of distilled water and 3 mL of CoCl2. The fifth had 7 mL of distilled water and 3 mL of CoCl2. 8) Test tube five contains 6 mL of distilled water and 4 mL of CoCl2. 9) Test tube six contains 5 mL of distilled water and 5 mL of CoCl2. 10) After all of the test tubes are prepared, they will be put into cuvettes.
Column Chromatography Lab Report
1696 Words | 7 PagesA small amount of sand was added after the layer of cotton. After that, a layer of silica filled almost 1/3 of the column. Finally, another small amount of sand was added just above the silica. The column was given a little tap with an aspirator to make the silica more compact. Figure 2.
Tension Test Lab Report
1182 Words | 5 PagesThe machine was set to 0 the force before the specimen was set into the machine. Each specimen was set into the machine, lining up the bottom of it with the the second pair of dots on the grasp. The top grasp was lowered to line the top of the specimen with the second row of dots on the upper grasp. Once in place and tightened, a strain gauge was attached to the specimen to measure how much
Respirometer Experiment
1436 Words | 6 PagesPart I Assembly of respirometers: 1. A total of 4 respirometers were set up. The respirometers are numbered 1, 2, 3 and 4. 2. Germinating seeds are placed in Respirometer 1, fresh seeds and beads are in Respirometer 2, dry seeds and beads in respirometer 3 and beads alone are placed in Respirometer 4.
More about Triaxial Test Apparatus
Nt1310 Unit 4 Coursework
1433 Words | 6 PagesAp Euro Dbq Rock Sample
626 Words | 3 PagesThe Crucible: Three Boiling Chips
292 Words | 2 PagesCopper Transformation Lab Report
1931 Words | 8 PagesTlc Lab
908 Words | 4 PagesPercent Cu2 + In A Mineral Sample
931 Words | 4 PagesHydrates Lab
737 Words | 3 PagesLab Report Limiting Reagents
872 Words | 4 PagesTlc Lab Report
771 Words | 4 PagesMole Mass Lab Report
372 Words | 2 PagesNt1310 Unit 5 Lab Report
265 Words | 2 PagesLab Report Spectrophotometry Lab
851 Words | 4 PagesColumn Chromatography Lab Report
1696 Words | 7 PagesTension Test Lab Report
1182 Words | 5 PagesRespirometer Experiment
1436 Words | 6 Pages