# Mass volume relationship in soil mechanics lecture

### SOIL MECHANICS-CH3-P1-Soil Phases Relationships | Mohammed S Mahmood - yogaua.info

All the weight- volume relationships needed in soil mechanics can be derived from appropriate combinations of six fundamental definitions. They are: Void ratio . CBES SOIL MECHANICS AND GEOLOGY Dr. Paul Ho PHASE RELATIONSHIPS Sept/ Page 1 of 12 PHASE RELATIONSHIPS 1. MASS – VOLUME. soil. 3. Lecture outline. • Soil as a 3-phase system. • Mass and volume relationships of soil constituents. • Soil particles and soil texture. Soil as a three- phase.

## 4. Phase Relations (Das, Chapter 3) Sections: All except 3.6

Weight Soil consists of solid particles and voids? Voids affect the engineering properties of soils Phase diagram Air Water s: To compute the mass or weight or volume of each phase.

Typical values Void ratio: Weight relationship The only weight-based parameter we define for phase relationship Water content or moisture content? Va Vv Vw Air Water? Unit weight of water: Unit weight of soil grains: It is often convenient to use unit weight rather than density in engineering calculations. Unit weights connect the volumetric side of the phase diagram with the weigh side.

It is always easier to work with dimensionless parameters, therefore: From volumetric side of the phase diagram: Gs is useful, it enables the volume of solid particles to be calculated from mass or weight. Total wet or moist unit weight: Useful unit weights in soil engineering?

### CE Geotechnical Engineering Weight-Volume Relationships 3 | Milton Teran - yogaua.info

Example 1 A saturated clay has a moisture content of What is the saturated unit weight? L14 Permeability of soils 2 Reliability of laboratory measurement of permeability. Field methods of measurement: L15 Seepage in soils 1 One-dimensional seepage: L16 Seepage in soils 2 and concluding remarks Flow net construction and uses in the solution of geotechnical seepage problems.

Recap on the main aspects of the topics covered in this course.

### 4. Phase Relations (Das, Chapter 3) Sections: All except ppt video online download

L17 Theory of compaction Definition of compaction. Soil properties and definitions: L18 Laboratory compaction tests Light compaction, heavy compaction, vibratory compaction.

Optimum moisture content and maximum dry density. L19 Field compaction plant Smooth wheeled rollers, pneumatic-tyred rollers, vibratory compactors, sheepsfoot rollers. The aim is to give the students ample opportunities to develop skills in applying the theories and methods learned to solve elementary geotechnical engineering problems. The exercises cover a great variety of elementary geotechnical problems in varying degrees of difficulty.

Tutorial Exercise 1 Mass-volume relationship and soil classification: This tutorial is intended for developing skills in basic calculations of the masses and volumes of the different components of a soil.

Exercises for soil description and soil classification are also included. Tutorial Exercise 2 Total and effective stresses: This tutorial is intended for students to develop skills in calculating the pore water pressure, total and effective geostatic stresses given the soil profile. Exercises for using Mohr's circle method of stress analysis are also included.

• DEGREE REGULATIONS & PROGRAMMES OF STUDY 2015/2016

Tutorial Exercise 3 Permeability and Seepage: This tutorial is intended for developing skills in solving geotechnical problems relating to soil permeability and seepage. The student should become familiar with the deduction of coefficient of permeability from different laboratory and in-situ methods, and the solution of 1-D and 2-D seepage problems. Tutorial Exercise 4 Compaction: Phase relationships; compaction curves; air void contours.

The students work in groups under the supervision of a laboratory demonstrator. The aim is to train the student in proper laboratory test techniques, including the analysis of results and the evaluation of relevant properties. Laboratory 1 Determination of plastic and liquid limits: The experiments to determine the plastic limit and liquid limit of a clay soil are performed in accordance to BS The results lead to the determination of the plasticity index and the use of the plasticity chart.

Laboratory 2 Compaction, maximum dry density: The experiment to determine the relationship between dry density and water content is performed in accordance to Test 12 of BS