CE 414 Geotechnical engineering Laboratory No. 10 STANDARD PROCTOR COMPACTION TEST GROUP 4 Members: Jan Christine S. Valenzuela Aecil Mariel J. De Leon Jamaica Salazar Mike Legaspi Mariel Legaspi Jayson Abiog Allisa Andhrey Sevilla Riz-Ann Acelador Juvylyn Pascual Karen Joy Zipagan Bridgette Ann Reyes Aries Tinio Equipment: Name Mold Assembly Rammer No. 4 U. S sieve Balance sensitive up to 0.1 g Picture Large flat pan Steel Straight edge Moisture cans Drying oven Plastic squeez bottle Mixing tools Calculation: Students’s Actual Test: Description 1. Obtain approximately 4.5 kg of air-dry soil at the site where the compaction test will be performed. Break all the soil lumps. 2. Sieve the soil on a No. 4 U. S sieve. Collect all of the material passing sieve No. 4 in a large pan. 3. Add enough water to the material passing sieve No.4 and mix it in thoroughly to bring the moisture content up to about 5 percent. 4. Determine the weight of the assembly. W1 (KG). Pictures 5. Pour the moist soil into the mold in three equal layers. Each layer should be compacted uniformly by the standard Proctor hammer in 25 blows before the next layer of loose soil is poured into the mold. 6. Remove the top attachment from the mold. Be careful not to break off any of the compacted will be even with the top of the mold. 7. Using a straight edge, trim the excess soil above the mold. Now the top of the compacted soil will be even with the top of the mold. 8. Determine the weight of the mold the base plate together with the compacted moist soil in the mold 9. Take a moisture can and determine its mass. 10. Take a moisture can and determine its mass. 11. Place the moisture can with the moist soil in the oven to dry to a constant weight. 12. The next day, determine the mass of the moisture cans plus the soil sample CONCLUSION The primary goal of soil compacting is to reduce subsequent settlement underworking loads. Compaction also increases the shear strength of the soil, decreases the voids ratio, making it more difficult for water to flow through the soil, and prevents the buildup of large water pressures that cause soil to liquify during earthquakes. Therefore, identifying the maximum unit weight of the soil is critical in order to maximize the usages mentioned above by identifying the quantities or qualities of the factors that affect compaction such as water content, the type of soil being compacted, and the amount of compactive energy used. After performing ASTM D698, it is concluded that the maximum dry unit weight 0.33354 kN/m^3 can be achieved using 11.12 % moisture content. The values attained can be a great use in construction using the test sample if maximum compaction is required in order to support the maximum load. RECOMMENDATION Because there is no way to compute for the error, we recommended that the experiment be repeated multiple times in order to provide more precise and accurate data. Aside from that, make sure to carefully follow the directions and understand them clearly to avoid errors. Also, there are lots of video tutorials in Youtube with regards to Standard Proctor Test that could help in understanding the test more before it is executed.
