# chap-3.docx

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Soil Mechanics 2018 Chapter 3: Methodology In this chapter the experimental design, materials and methods, treatment of data, and the decision criteria were discussed. The main objective is to present the methodology and research design Technical/Experimental This study will use experimental method in gathering the necessary data in the physical properties of the soil in Rio De Oro, Gen Trias, Cavite. Experimental method of research was used due to the involvement of the series of experiments involved in determining the physical properties of the soil used specifically the specific gravity, in situ moisture content, void ratio, degree of saturation, optimum moisture content, liquid limit, plastic limit and plasticity index of soil. Materials: Soil The soil used for this experiment was obtained from Rio De Oro, Gen Trias, Cavite where a 1m hole deep was dug before retrieving the actual soil sample. The soil was then dried and sieved at required sieve number in each tests/ experiments. Soil Specimen Testing For In Situ Moisture Content Determination: ASTM D - 4959 Weigh a tin cup including its cover; identify the cover and its lid. Determine the weight of the tin cup Place a representative soil sample of wet soil in the cup. Determine the weight of wet soil and tin cup Place the sample in the over for at least 3 hours When the sample has dried to constant weight, obtain the weight of cup and dry soil Compute the water content. The difference between weight of wet soil plus cup and weight of dry soil plus cup is the weight of water (W w ). Also compute the weight of dry soil (W s ) Technological Institute of the Philippines 1 | P a g e

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Soil Mechanics 2018 Determine the water content Repeat until three trials are achieved. Determine the average moisture content The Water Content shall be calculated as follows: Equation 1 where: w = Water content in % W w = Weight of water in kg W s = Weight of soil in kg For Specific Gravity Determination: ASTM D - 854 Calibration of Pycnometer Transfer carefully the 25 gm sample to the calibrated bottle and add distilled water until about ½ full. Care must be exercised so as not to lose any of the soil in the transfer Expel the entrapped air by boiling gently for at least 10 minutes. Roll the bottle occasionally to facilitate the removal of air. Cool the sample to room temperature or to a temperature within the range of the calibration curve of the bottle used Deteremination of Specific Gravity Fill the bottle with distilled water to the calibration mark as discussed in step 2 from calibration of bottle.
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• Spring '16
• Bansil
• Mass, Atterberg limits, Arthur Casagrande, Technological Institute

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