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Part 3 Classify the following soils using the Unified soil classification system. Give group symbols and group names. Sieve analysis (percent finer) Soil Liquid Plasticity No. No. 4 No. 200 limit limit Comments C, = 4.48 and C, = 1.22 1 94 3 NP 2 100 77 63 25 100 86 55 28 4 100 45 36 22 5 92 48 30 8

Part 3 Classify the following soils using the Unified soil classification system. Give group symbols and group names. Sieve analysis (percent finer) Soil Liquid Plasticity No. No. 4 No. 200 limit limit Comments C, = 4.48 and C, = 1.22 1 94 3 NP 2 100 77 63 25 100 86 55 28 4 100 45 36 22 5 92 48 30 8

Principles of Geotechnical Engineering (MindTap Course List)
Principles of Geotechnical Engineering (MindTap Course List)
9th Edition
ISBN:9781305970939
Author:Braja M. Das, Khaled Sobhan
Publisher:Braja M. Das, Khaled Sobhan
Chapter3: Weight–volume Relationships
Section: Chapter Questions
Problem 3.1P
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Part 3 Classify the following soils using the Unified soil classification system. Give group symbols and group names. Sieve analysis (percent finer) Soil Liquid Plasticity No. No. 4 No. 200 limit limit Comments C, = 4.48 and C, = 1.22 1 94 3 NP 2 100 77 63 25 3 100 86 55 28 4 100 45 36 22 5 92 48 30 Table 5.2 Unified Soil Classification System (Based on Material Passing 76.2-mm Sieve) Group symbol Criteria for assigning group symbols Gravels C, 2 4 and 1s C, s 3 C. <4 and/or C, <1 or C,>3 PI < 4 or plots below "A" line (Figure 5.3) PI>7 and plots on or above "A" line (Figure 5.3) Clean Gravels GW More than 50% Less than 5% fines GP of coarse fraction retained on No, 4 sieve Gravels with Fines GM GC Coarse-grained soils More than 12% fines More than 50% Clean Sands Less than 5% fines C, > 6 and 1<C, <3 C, < 6 and/or C, <1 or C, >3 PI< 4 or plots below "A" line (Figure 5.3) PI >7 and plots on or above "A" line (Figure 5.3) retained on No. 200 Sands Sw SP sieve 50% or more of coarse fraction Sands with Fines SM passes No. 4 sieve More than 12% fines SC CL PI >7 and plots on or above "A" line (Figure 5.3) PI < 4 or plots below "A" line (Figure 5.3) Liquid limit-oven dried Liquid limit- not dried Inorganic Silts and clays Liquid limit less than 50 ML OL < 0.75; see Figure 5.3; OL zone Fine-grained soils 50% or more passes No. 200 sieve Organic Pl plots on or above "A" line (Figure 5.3) PI plots below "A" line (Figure 5.3) Liquid limit -oven dried Inorganic CH мн Silts and clays Liquid limit 50 or more Organic < 0.75; see Figure 5.3; OH zone OH Liquid limit-not dried Highly organic soils Primarily organic matter, dark in color, and organic odor Pt "Gravels with 5 to 12% fine require dual symbols: GW-GM, GW-GC, GP-GM, GP-GC. "Sands with 5 to 12% fines require dual symbols: SW-SM, SW-SC, SP-SM, SP-SC. If 4s PI s7 and plots in the hatched area in Figure 5.3, use dual symbol GC-GM or SC-SM. If 4s PI=7 and plots in the hatched area in Figure 5.3, use dual symbol CL-ML.
Transcribed Image Text:Part 3 Classify the following soils using the Unified soil classification system. Give group symbols and group names. Sieve analysis (percent finer) Soil Liquid Plasticity No. No. 4 No. 200 limit limit Comments C, = 4.48 and C, = 1.22 1 94 3 NP 2 100 77 63 25 3 100 86 55 28 4 100 45 36 22 5 92 48 30 Table 5.2 Unified Soil Classification System (Based on Material Passing 76.2-mm Sieve) Group symbol Criteria for assigning group symbols Gravels C, 2 4 and 1s C, s 3 C. <4 and/or C, <1 or C,>3 PI < 4 or plots below "A" line (Figure 5.3) PI>7 and plots on or above "A" line (Figure 5.3) Clean Gravels GW More than 50% Less than 5% fines GP of coarse fraction retained on No, 4 sieve Gravels with Fines GM GC Coarse-grained soils More than 12% fines More than 50% Clean Sands Less than 5% fines C, > 6 and 1<C, <3 C, < 6 and/or C, <1 or C, >3 PI< 4 or plots below "A" line (Figure 5.3) PI >7 and plots on or above "A" line (Figure 5.3) retained on No. 200 Sands Sw SP sieve 50% or more of coarse fraction Sands with Fines SM passes No. 4 sieve More than 12% fines SC CL PI >7 and plots on or above "A" line (Figure 5.3) PI < 4 or plots below "A" line (Figure 5.3) Liquid limit-oven dried Liquid limit- not dried Inorganic Silts and clays Liquid limit less than 50 ML OL < 0.75; see Figure 5.3; OL zone Fine-grained soils 50% or more passes No. 200 sieve Organic Pl plots on or above "A" line (Figure 5.3) PI plots below "A" line (Figure 5.3) Liquid limit -oven dried Inorganic CH мн Silts and clays Liquid limit 50 or more Organic < 0.75; see Figure 5.3; OH zone OH Liquid limit-not dried Highly organic soils Primarily organic matter, dark in color, and organic odor Pt "Gravels with 5 to 12% fine require dual symbols: GW-GM, GW-GC, GP-GM, GP-GC. "Sands with 5 to 12% fines require dual symbols: SW-SM, SW-SC, SP-SM, SP-SC. If 4s PI s7 and plots in the hatched area in Figure 5.3, use dual symbol GC-GM or SC-SM. If 4s PI=7 and plots in the hatched area in Figure 5.3, use dual symbol CL-ML.
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