Amount of water that added to achieve the optimum moisture, Civil Engineering

Assignment Help:

Geotechnical project specifications require that the soil's optimum moisture content of 24% be maintained during the roadbed's construction.   The field moisture test finds that five-pounds of soil has a water content of 11%.  The amount of water that must be added during the day's planned production of 1,250-tons to achieve the optimum moisture content is most nearly:

Solution:  The total mass of the moist soil is equal to the dry soil and water content.  The mass of water is equal to 11% of the dry soil.  This relationship is represented in the following equation:

Mtotal     = Msoil + Mwater

Mtotal     = Msoil + 0.11 Msoil

Mtotal     = 1.11 Msoil

Solve for the mass of the dry soil and water:

Msoil =  Mtotal/1.11  =   5-lb/1.11  =    4.50-lb

Mwater   = 0.11Msoil

 = (0.11) (4.50-lb) = .50-lb  

To raise the water content from 11% to 24%, the earthwork contractor must add 13% by mass of water.

 ΔMwater   = (ΔWrequired) (Msoil)

    = (0.13) (4.50-lb) 

    = 0.585-lbm of water per 5-lbs of soil

OR  = 0.117-lb of water / lb of soil  

Convert the results of the required additional water and apply it to the day's planned production:

 1,250-ton x 2,000-lb/ton = 2,500,000-lb of soil

2,500,000-lb of soil x 0.117-lbm of water/lb of soil = 292,500-lbm of water

292,500-lb of water ÷ 62.4-lb of water/ft3 = 4,688-ft3

4,688-ft3 x 7.48gal/ft3 = 35,062.5-gallons


Related Discussions:- Amount of water that added to achieve the optimum moisture

Advantageous to use concrete of very high power, Question Will it advantag...

Question Will it advantageous to use concrete of very high power for example exceeding 60MPa? What are potential problems connected with high strength concrete ? Answer To in

Explain types of tiles, Q. Explain Types Of Tiles? Different types of t...

Q. Explain Types Of Tiles? Different types of tiles available in the market for floor and walls & dado are as under - 1. Glazed tiles , 2. Ceramic tiles , 3. Granit

Harbours, natural phenomenon affecting the designs of harbours

natural phenomenon affecting the designs of harbours

Advantages associated with this kind of material, Question In pumping s...

Question In pumping stations one of choices for the material of water tanks is fibre-reinforced plastic. What are main advantages associated with this kind of material? An

Calculate the number of trucks for fleet working, A contractor was awarded ...

A contractor was awarded a Contract to excavate and haul 200,000-yds 3 of silty clay (USCS classification ML) with a bulking factor of 30%.  The contractor's fleet of dump trucks

Calculate the total labor cost per cubic yard, A contractor will place 90-c...

A contractor will place 90-cubic yards of concrete for a housekeeping pad on the rooftop of a 36-ft tall building. Site conditions dictate that the safest and best method of placem

Graphics, 1. Draw the projections of a line AB that is 50 mm long and is pa...

1. Draw the projections of a line AB that is 50 mm long and is parallel to both the HP and the VP. The line is 40 mm above the HP and 25 mm in front of the VP. 2. A line AB, 50 mm

Temporary repairs to rail fracture, Q. Temporary Repairs to rail fracture? ...

Q. Temporary Repairs to rail fracture? If a welding party is not readily available, the fracture shall be repaired by using a cut-rail (not less than 4 meter long) and clamped/

Determine the value of the coefficient of permeability, Determine the value...

Determine the value of the coefficient of permeability A glass cylinder 5 cm internal diameter with a screen at the bottom is used as a falling head permeameter. The thickness

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd