Standard Proctor test was conducted on a silty clay soil collected from a proposed construction site. The results are shown in the following table. trial no. mass of moist soil in the mold (g) moisture Dry density content (%) 1 1480 9.4 1570 12.4 1690 14 1700 15.5 5 1650 18.3 a. Determine the maximum dry density (kg/m3) of compaction and the optimum moisture content. Given: volume of mold: 943.3 cm3. b. What is the degree of saturation at optimum moisture content? Gs=2.75 c. If the required field dry unit weight is 1470 kg/m3, what is the relative compaction? d. What should be the range of compaction moisture contents in the field to achieve the above relative compaction? 3. 4.

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Introduction to Engineering Design

Students are often confused with engineering and design. The term engineering design has two words with different meanings, engineering, and design. The term engineering implies applications of laws and principles of science to design and analyze physical structures and components. In civil engineering, students apply the concept of physics and chemistry to design and build structures and buildings. In engineering disciplines, the term design means determining the dimensions, loads, and associated influences on the component due to the applied loads such as stresses and deformations. The estimation of such parameters is crucial to make the component or structure foolproof.