1) Given the following results of sieve analysis of coarse aggregates: Sieve Size Weight Retained (lb) 2 in 0 1 in 5.2 1 in 18.1 3/4 in 14.8 1/2 in 3/8 in 25.0 No. 4 8.5 Pan 1.6 16.3 a) Calculate. Sieve 2 in Individual retained Cumulative retained % Passing 1 in 3/4 in 1/2 in 3/8 in No.4 Pan b) Plot the gradation curve on a 0.45 power gradation chart. c) What is the maximum size and nominal maximum size of the aggregates according to the Superpave criteria? 2) Laboratory specific gravity and absorption are run on two coarse aggregates, which are to be blended with 60% aggregate A and 40% aggregate B by weight: Aggregate A: Bulk dry specific gravity = 2.81; absorption = 0.4% Aggregate B: Bulk dry specific gravity = 2.44; absorption = 5.2 % a) What is the specific gravity of the blend? b) What is the absorption of the blend? 3) Three aggregate stockpiles are designated as A, B, and C. a) Determine an aggregate blend of stockpiles A, B, and C that meets specifications, b) Plot the gradations of the aggregate blend you produced in part (a) as well as the specifications (lower and upper limits) on 0.45 power gradation chart. Sieve size Stockpile A Stockpile B Stockpile c Specifications % Passing Passing Passing Passing 3/4" or 19.0 mm 100 100 100 100 5/8" or 16.0 mm 60 100 100 90 - 100 1/2" or 12.5 mm 40 100 100 3/8" or 9.5 mm 20 100 75 - 90 1/4" or 6.3 mm 5 50 55 - 75 # 4 or 4.75 mm 2 40 100 # 8 or 2.36 30 90 #10 or 2.0 mm 1 20 60 30 - 42 # 40 or 0.425 mm 5 30 11 - 24 #200 or 0.075 mm 1 10 3.0 - 7.0 60 100 1 1 1 4) Determine the specific surface area (SA) of the aggregate you produced in Q84. 5) The following are the results of gradation tests on three aggregates. Combine them to the gradation required. What are the combined specific gravity and absorption values? Sieve Aggregate A 100 Percent Passing Aggregate B Aggregatec 100 100 Required 100 25 mm 19 mm 92 100 100 95 9.5 mm 40 93 100 62 4.75 mm 19 77 95 46 2.36 mm 7 60 79 4 42 40 600 300 2 36 25 11 75 m 1 28 8 S 0.5% 0.8% 1.2% Absorption Specific Gravity 2.750 2.600 2.700 1) Given the following results of sieve analysis of coarse aggregates: Sieve Size Weight Retained (lb) 2 in 0 1 in 5.2 1 in 18.1 3/4 in 14.8 1/2 in 3/8 in 25.0 No. 4 8.5 Pan 1.6 16.3 a) Calculate. Sieve 2 in Individual retained Cumulative retained % Passing 1 in 3/4 in 1/2 in 3/8 in No.4 Pan b) Plot the gradation curve on a 0.45 power gradation chart. c) What is the maximum size and nominal maximum size of the aggregates according to the Superpave criteria? 2) Laboratory specific gravity and absorption are run on two coarse aggregates, which are to be blended with 60% aggregate A and 40% aggregate B by weight: Aggregate A: Bulk dry specific gravity = 2.81; absorption = 0.4% Aggregate B: Bulk dry specific gravity = 2.44; absorption = 5.2 % a) What is the specific gravity of the blend? b) What is the absorption of the blend? 3) Three aggregate stockpiles are designated as A, B, and C. a) Determine an aggregate blend of stockpiles A, B, and C that meets specifications, b) Plot the gradations of the aggregate blend you produced in part (a) as well as the specifications (lower and upper limits) on 0.45 power gradation chart. Sieve size Stockpile A Stockpile B Stockpile c Specifications % Passing Passing Passing Passing 3/4" or 19.0 mm 100 100 100 100 5/8" or 16.0 mm 60 100 100 90 - 100 1/2" or 12.5 mm 40 100 100 3/8" or 9.5 mm 20 100 75 - 90 1/4" or 6.3 mm 5 50 55 - 75 # 4 or 4.75 mm 2 40 100 # 8 or 2.36 30 90 #10 or 2.0 mm 1 20 60 30 - 42 # 40 or 0.425 mm 5 30 11 - 24 #200 or 0.075 mm 1 10 3.0 - 7.0 60 100 1 1 1 4) Determine the specific surface area (SA) of the aggregate you produced in Q84. 5) The following are the results of gradation tests on three aggregates. Combine them to the gradation required. What are the combined specific gravity and absorption values? Sieve Aggregate A 100 Percent Passing Aggregate B Aggregatec 100 100 Required 100 25 mm 19 mm 92 100 100 95 9.5 mm 40 93 100 62 4.75 mm 19 77 95 46 2.36 mm 7 60 79 4 42 40 600 300 2 36 25 11 75 m 1 28 8 S 0.5% 0.8% 1.2% Absorption Specific Gravity 2.750 2.600 2.700