Lab Report #4Soil Classification Using USCS & AASHTO (Abstract) The purpose of the experiment is to determine the classification of the soil sample based on the particle size, liquid limit, and plasticity index determined in previous experiments using the Unified Soil Classification System and AASHTO Classification System. These values are essential in determining characteristics and behaviour of soil in construction of engineering structures such as foundation, pavements, embankments, and roads. It has been determined that the soil is well-graded sand, SW, according to USCS while silty or clayey gravel and sand, A-2-7, according AASHTO. Submitted by: Julius Rey D. Baniqued Group Mates: Renz Gian Cavida Ephraim Madanguit Christian Paul Maranan Roland Mondano Jr. Marc Neil Rabin Date Submitted: November 13, 2015 Classify the soil sample based on the results of previous laboratory tests using AASHTO Classification System.Grained Figure 1: Flowchart for Classifying Fined Grained Soils (ASTM D2487-11) . Data from previous experiment Methodology USCS Fined grained if ≥ 50% by dry weight of specimen passes No 200 sieve or coarsed grained if ≥50% by dry weight of specimen is retained on the No 200 sieve. II.I. Fined. Materials III. Objectives Classify the soil sample based on the results of previous laboratory tests using USCS. Figure 2: Flowchart for Classifying Organic Fined-Grained Soil (ASTM D2487-11) Coarsed-Grained Figure 3: Flowchart for Classifying Coarsed-Grained Soil (ASTM D2487-11) . 6 0.075 80. Data and Results Sieve # Opening.85 214.508 1.75 2 0. 2010) IV.0949361 35.19821886 8. g 4 10 30 50 100 200 pan 4.35 549.35 0 646 1032.178 0.263777782 3. g 2593.5 0 Mass Passing.35 80.469 Plastic Limit Liquid Limit 29% 48% Cumulative Mass Retained.5 2044 2379.85 915.5 365.5 134 2593.g 0 646 1678.15 0.5 335.For AASHTO Classification System.85 1947.28924186 21.5 2513.097711895 . mm Mass Retained. g Percent Finer.35 0 100 75. Table 1: Classification of soil using AASHTO Classfication System (Das.85 D10 D30 D60 0.355 0. Table 1 is used. 19 Plasticity Index Optimum Moisture Content 22. the soil is classified as silty or clayey gravel and sand. the soil is classified as sand. the soil is well-graded sand. Conclusion Using USCS. A3. VI. SW. 200 sieve. 200 sieve. Analysis and Discussion USCS From sieve analysis. A1-b. . thus from ASTM D2487 Section 12. Using AASHTO Classification system. According to USCS. Since all of the coarse particles of the soil pass Sieve No. SW. AASHTO Classification System Since the plasticity index of the soil is 19 > 6. The general subgrade rating of the soil to be used beneath highway pavement is good. It does not also exhibit tendency towards high compressibility or expansion. the soil is classified as well-graded sand. A-2-4. the does not qualify for A-1-a. According to ASTM D2487 Section 10. and A-2-5. the soil is classified as A-2-7.77 kN/m3 V. Since 3% < 35% passed No. To control seepage. it is required to construct upstream blanket and toe drainage or wells. according to ASTM D2487 Section 12. 3 % of the soil particles passed the 200 sieve. Cu is 8.2. and Cc is approximately 1. 4. liquid limit is greater than 41% and plasticity index is greater than 11. Since liquid limit is 48% > 40. the soil does not qualify for A2-6. SW soil is very stable and pervious which requires slope protection if used in embankments and foundations. A-2-7.1. the soil is coarsed-grained.2. It has also good compaction characteristics and good bearing value for foundations.7 % Maximum Dry Unit Weight 15.3.3. it was determined that 97% of the soil particles by dry weight are retained in the No. VII. ASTM International. PA. . Cengage Learning. Accessed November 13. Principles of Geotechnical Engineering.org Das. Standard Practice for Classification of Soils and Soil-Aggregate Mixtures for Highway Construction Purposes. Standard Practice for Classification of Soils for Engineering Purposes (Unified Soil Classification System). 2015. West Conshohocken. USCS. PA.astm. B. Global Security.astm. www. 2011. 2010. References ASTM D3282-09.. www.M. ASTM International. 2009. globalsecurity.org ASTM D3282-09.org/militaryy/libra ry/policy/army/fm/5-472/apb.pdf. West Conshohocken.