ENEN20002 Earth Processes for Engineering Marking Scheme for Report on Practical Exercise Item Marking criteria Marks 1 Visual Classification a) How can you use the visual classification method to identify a coarse-grained soil sample b) How can you use the visual classification method to identify a fine-grained soil sample c) How can you use the visual classification method to identify the level of plasticity fine-grained soil sample 2 2 4 2 Grain Size Distribution (Sieve Analysis) a) Calculations leading to cumulative % passing. b) Plotting of Grain Size Distribution curve (using any graphing software) c) Selection of D10, D30, and D60 (Show on Plot). d) Calculation of Cu. e) Calculation of Cc. f) Explain the physical significance of Cu & Cc, accounting for their differences. g) Conclude on USC symbol for coarse-grain soil. 6 4 3 3 3 5 4 3 Atterberg Limits a) Calculation and graphical determination of LL. b) Calculation of PL. c) Calculation of PI. d) Use of Plasticity Chart to classify Fine-Grained Soils. e) Conclude on USC symbol for fine-grained soil. 8 6 2 4 2 4 Practical Exercise a) Describe principal purpose & function of each of the zones of a dam to achieve the basic objective of a dam. b) Specify the desirable engineering properties for materials to achieve the principal purpose and function of each zone. c) Out of the three (3) soils in the laboratory exercise, choose the most suitable soil for each zone base on their engineering properties. 8 8 6 5 General a) Completed cover sheet. b) Concise description of the laboratory method (e.g. citing relevant Test Standard or references instead of reproducing the step-by-step test procedure). c) Meaningful discussions of laboratory results and practical exercise. d) Logical presentation of facts, arguments, and conclusions. e) Professional presentation (i.e. clear labelling of figures and tables, significant figures, font size etc.). 2 4 4 4 6 TOTAL 100 Note: Report weight = 10% of total subject
