Answer the following by True or False (Note: each one wrong answer will cancel one right answer). Choose 5 only. 1- Mechanical stabilization has been used to reinforce road sections. 2- (6-15%) percent by weight used when stabilize fine grained material by cement. 21 of granular material should be adequate for subgrade

Answer the following by True or False (Note: each one wrong answer will cancel one right answer). Choose 5 only. 1- Mechanical stabilization has been used to reinforce road sections. 2- (6-15%) percent by weight used when stabilize fine grained material by cement. 21 of granular material should be adequate for subgrade

Fundamentals of Geotechnical Engineering (MindTap Course List)

5th Edition

ISBN:9781305635180

Author:Braja M. Das, Nagaratnam Sivakugan

Publisher:Braja M. Das, Nagaratnam Sivakugan

Chapter2: Soil Deposits-origin, Grain-size, And Shape

Section: Chapter Questions

Problem 2.15CTP: In concrete work, Fuller and Thompson (1907) suggested that a dense packing of grains can be...

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choose the correct answer Q1A- Compacting is done to: * 1-Placing concrete on flat surface 2-Remove air bubbles 3-Placing concrete on sloping surface 4-Introducing air bubbles B- The higher the elastic modulus, the lower resistant the material is to deformation. * 1-True 2-False C That specimens whose length (h) is less than 1.5d show a ______ strength than those with a greater length * 1-Higer 2-Equal 3-Less 4-Other
Q6. You have the following mix design data for 1 yd³ of concrete. What volume of fly ash will you have? Ingredient: Water Portland Cement Fly Ash Coarse Aggregates Fine Aggregates (Please select the best answer) A. a. 24.6 yd3 B. 174.7 yd3 C. 0.3 yd³ D. 3.1 yd³ E. 1.2 yd³ Weight 282 lbs 624 lbs 60 lbs 1820 lbs 1243 lbs SG 1.0 3.15 2.8 2.7 2.75
Please
Concrete is required for a column that will be moderately exposed to freezing and thawing. The cross section of the column is 300 × 300 mm. The smallest spacing between reinforcing steel is 30 mm. The specified compressive strength of concrete at 28 days is 40 MPa with a slump of 80 to 100 mm. The properties of materials are as follows: ❖ Cement used is type I Portland cement with a specific gravity of 3.15. ◆ The available coarse aggregate has a maximum size of 23 mm, a dry-rodded unit weight of 1800 kg/m3, a bulk specific gravity (SSD) of 2.7, absorption capacity of 0.55%, and moisture content (SSD) of 0.25%. The fine aggregate has a bulk specific gravity (SSD) of 2.75, absorption capacity of 1.4%, a moisture content (SSD) of 2.5%, and a fineness modulus of 2.70. The aggregates conform to the ASTM C33-84 requirements for grading.
This course EHide blocks An aluminum pipe is filled in concrete is subjected to a pure compressive force as shown in the figure below. Determine the factor of safety against compressive stress acting on the column. The pipe has an outer diameter of 45 mm and inner diameter of 35 mm. The aluminum and the polymer concrete have the following material properties: Young's modulus: Eal = 70 GPa (aluminum), Ecr = 30 GPa (concrete). Yield compressive strength: Sy-al = 180 MPa (aluminum), Sy-cr 60 MPa (concrete). 100 kN 500 mm Select one: O FS = 1.5 O FS = 1.7 O ES- 19 5:45 PM 86°F Light rain ENG 6/18/2021
Answer by true or false for the following Aggregate is said to be sound when volume changes results in the deterioration of concrete. a- True b- False
Compute the Fineness Modulus for fine aggregate.
b. Shrinkage is defined as the reduction in volume of 1.2 Fill the blank space (s) with the correct answer given at the end of each question below a. In reinforced concrete cross section the strain in reinforcing bar is the same as that of the surrounding 1- Bars 2- concrete 3- load 4- shear b. should be placed in the locations of anticipated tensile stresses and cracking areas 4- Loads 1- Concrete 3- Reinforcement 2- Water 1.3 Write two of the mechanical properties of the concrete? a. b.
Concrete is required for a column that will be Severe exposed to freezing and thawing. The cross section of the column is 300 × 300 mm. The smallest spacing between reinforcing steel is 30 mm. The Required Average Compressive Strength of concrete at 28 days is 35 MPa with a slump of 80 to 100 mm. The properties of materials are as follows: ❖ Cement used is type I Portland cement with a specific gravity of 3.15. ◆ The available coarse aggregate has a maximum size of 23 mm, a dry-rodded unit weight of 1800 kg/m3, a bulk specific gravity (SSD) of 2.7, absorption capacity of 0.55%, and moisture content (SSD) of 0.25%. The fine aggregate has a bulk specific gravity (SSD) of 2.75, absorption capacity of 1.4%, a moisture content (SSD) of 2.5%, and a fineness modulus of 2.70. The aggregates conform to the ASTM C33-84 requirements for grading.
A concrete mix includes the following ingredients per cubic meter: a. Cement = 400 kg b. Water = 176 kg c. No admixture Table P6.30 shows possible changes that can be made to the mix ingredi- ents. Indicate in the appropriate boxes in the table what will happen in each case for the workability and the ultimate compressive strength as increase, decrease, or approximately the same.
Problem 2: If f = 3 ksi what is the modulus of elasticity Ec and the maximum tensile stress fr that the concrete can carry before cracking (use ACI recommended equations). Assume a unit weight of the plain concrete is: a. Wc = 90- b. w lb lb 118- ft39 ft3) C. W = 160- Problem 3: Wight 3-6 Rugblom 4: Wight ? 7 lb ft3
Q3: Discuss importance of sieve analysis test conducted on both fine and coarse aggregateQ4: Concrete cylinder placed in universal testing is subject to axial compressive load. Concretecylinder crushed at a load of 85 kilo pounds, calculate compressive strength of concrete. (Concretecylinder has 6 inches diameter and 12 inches height)