2. Solve the following problems. A. Given properties of cement, sand and gravel is presented in the table below: Specific Density, Materials Gravity, kg/m3 Gs Cement 3.22 1510 Sand 2.75 1688 Gravel 2.58 1529 Solve for the number of bags, volume of sand, 3 gravel and water for a 35m of concrete.

2. Solve the following problems. A. Given properties of cement, sand and gravel is presented in the table below: Specific Density, Materials Gravity, kg/m3 Gs Cement 3.22 1510 Sand 2.75 1688 Gravel 2.58 1529 Solve for the number of bags, volume of sand, 3 gravel and water for a 35m of concrete.

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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Three samples of aggregates were taken weighed in moist and dry condition. Moist Dry Unit Unit Absorption Volume Aggregate Wt. Wt. (%) (m³) (kN/m) (kN/m³) Sample 1 23.425 20.018 5.14 0.366 Sample 2 22.7 18.757 3.87 0.695 Sample 3 20.292 18.387 2.62 0.237 Where; Unit weight of water = 9.81 kN/m3 Determine the average free moisture content of the three samples.
sum SDN = 27
Determine the bag of cement and the quantities of sand and gravel required for 20 cu. m. of concrete 1:2:4 mix with the following data: Materials Specific gravity Unit weight 1508 kg/m3 1684 kg/m³ 1524 kg/m3 Cement Sand 3.10 2.65 Gravel 2.50 Assume 1 bag per 0.0283 m³ of concrete use 7 gallons of water per bag of cement.
4 pts Question 23 What is the fineness modulus of this aggregate? % Cumulative Retained Retained Mass 0% Sieve Size (US) (g) Retained Passing 1" 3/4" 1/2" 3/8" # 4 650 18.3 700 19.7 632 17.8 175 4.9 # 8 200 5.6 #16 W 150 4.2 #30 125 3.5 #50 331 9.3 #100 288 8.1 #200 250 7 Pan 50 1.4 Total 3551 O 5.20 O 1.57 O 3.89 O 6.50
Determine the suitability of the aggregate, with the gradation tabulated below, for use in Portland cement concrete. Review the grain size distribution to determine if it meets all of the relevant specifications for use in concrete (i.e. gradation limits, fineness modulus and % fines). Refer to the specification for concrete aggregates (Table 7 – 10) below: Grain Size (mm) % Passing Cum %Retained 25 100 19 100 12.5 100 9.5 100 4.75 95 2.36 85 1.18 55 0.6 30 0.3 15 0.15 8 0.075 6 Fineness Modulus - write answer to two decimal places Percent fines - write answer to the nearest whole number % Meets Gradation Limits? - y/n (only type lower case "y" for yes and lower case "n" for no) Suitable for use in portland cement concrete subject to abrasion? - y/n (only type lower case "y" for yes and lower case "n" for no)
A sieve analysis test was performed on a sample of aggregate and produced the results shown in Table P5.21. TABLE P5.21 Amount Sieve Size, Amount Sieve Size, mm Retained, g mm Retained, g 25 1.18 891.5 19 376.7 0.60 712.6 12.5 888.4 0.30 625.2 9.5 506.2 0.15 581.5 4.75 1038.4 0.075 242.9 2.36 900.1 Pan 44.9 Calculate the percent passing through each sieve. Plot the percent passing versus sieve size on: a. a semilog gradation chart, and b. a 0.45 gradation chart (Figure A.25). What is the maximum size? What is the nominal maximum size?
Coarse aggregate is placed in a rigid bucket and rodded with a tamping rod to determine its unit weight. The following data are obtained: Volume of bucket ½ ft3 Weight of empty bucket Weight of bucket filled with dry rodded coarse aggregate 20.3 lb Trial 1 = 69.6 lb Trial 2 = 68.2 lb Trial 3 = 71.6 lb a. Calculate the average dry-rodded unit weight b. If the bulk dry specific gravity of the aggregate is 2.620, calculate the per- cent voids between aggregate particles for each trial.
5.14 Coarse aggregate is placed in a rigid bucket and rodded with a tamping rod to determine its unit weight. The following data are obtained: Volume of bucket = ¹/2 ft³ Weight of empty bucket = 20.3 lb Weight of bucket filled with dry rodded coarse aggregate: Trial 176.6 lb Trial 275.1 lb Questions and Problems 217 Trial 3 78.8 lb a. Calculate the average dry-rodded unit weight b. If the bulk dry specific gravity of the aggregate is 2.620, calculate the percent voids between aggregate particles for each trial.
One cubic yard (cy) is equal to 27 cubic feet (cf). If a cubic yard of concrete has 2.50 cf of cement, 5.45 cf of water, and 5% air voids, what is the total volume of aggregates in cf/cy? Group of answer choices 27.00 14.05 17.70 22.05
A concrete mix consists of 5 gallons of water for each bag of cement. What is the expected compressive strength of this mix based on the compressive strength curve shown here? Given information: Weight of US standard cement bag = 94 lbs Water weight = 8.34 pounds per gallon COMPRESSIVE STRENGTH psi 6000 5000 4000 3000 2000 0.3 0.4 6000 psi 5000 psi 4000 psi 3000 psi NORMAL CONCRETE 0.5 0.6 W/C RATIO 0.7 MPa 42 35 28 21 14 0.8
2.0 The pycnometer method has been adopted to measure the specific gravity of cement. The [10] following observations are made: Weight of empty dry pycnometer bottle = 682.4 gms Weight of empty dry pycnometer bottle + cement = 745.4 gms Weight of empty dry pycnometer bottle + cement + kerosene = 1335 gm Weight of empty dry pycnometer bottle completely filled with kerosene = 1279.2 gm The temperature during test = 27°C Specific gravity of kerosene at 27°C = 0.773 Determine the specific gravity of cement. 20 Dicquga the or f uood How d0 honon menor oot uro
A sieve analysis test was performed on a sample of fine aggregate and produced the following results:Sieve, mm 4.75 2.36 2.00 1.18 0.60 0.30 0.15 0.075 panAmount retained, g 0 33.2 56.9 83.1 151.4 40.4 72.0 58.3 15.6Calculate the percent passing each sieve, and draw a 0.45 power gradation chart with the use of a spreadsheet program. The specific steps or functions selected in the following description can vary somewhat depending on the version of the spreadsheet program being used.