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Civil Engineering

Civil Engineering is a profession of designing and executing structural works that serve the general public, like houses, buildings, roads, etc. A Civil Engineer is an engineer trained in the design and construction of public works, such as bridges or dams, and other large facilities.

10,297 Questions
Chemistry
Civil Engineering
Construction
Metallurgy

What does Fe500 steel mean?

The abbreviation

Fe stands for Ferrous material ie iron from which the reinforcement steel bars are manufactured.

The reinforcement steel bars used in RCC (Reinforced Cement Concrete) are designated as Fe415 or Fe500 depending on their Yield Strength. (The numbers 415 and 500 tell about this Yield Strength in N/mm2 the bars are designed and manufactured to have.)

As per IS : 1786 Yield Stress (also known as 0.2%proof stress) of Fe 500 is 500 N/mm2.

So, Fe500 steel means the reinforcement steel rods (or bars) that can safely withstand an Yield Stress of 500 N/mm2.

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Miscellaneous
Sociology
Civil Engineering
Buildings

Where did people live before they evolved to live in buildings and houses?

Initially people lived in the open or under the canopies of trees or in caves or in any sheltering hole they could find comfort suiting to the prevailing weather conditions.

As the population multiplied they felt the need for creating shelters using broad leaves, tree branches, stones, soil, etc.

Gradually they developed building many varieties of structures as their needs increased.

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Units of Measure
Civil Engineering
Mechanical Engineering

How many PSI in 2.8 bar g?

1 bar is 14.50377 PSI, so 2.8 bars is 40.610 PSI.

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Civil Engineering
Bridges and Tunnels

What Type Of Bridge Is The Rialto Bridge?

It's an arch.

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Chemistry
Civil Engineering

How do you prevent efflorescence?

I am using a product called Stop Salt. I have been using this product for the last six months, I am amazed! It produces outstanding mortar, the pointing up is brilliant and it cuts out the efflorescence that we all hate as Bricklayers. I hope this can be of some help to you, try it.

If the intent is to "Prevent" efflorescence a penetrating sealer that migrates into a concrete based material, either concrete or cement based mortars should be considered. You should use a sealer that enters the Gel-Pore or Capillary System where it reacts with the alkali to form a solid Inside the matrix. Once this solid is formed, internal chemistry does migrate out to a surface to react with an atmosphere. I use one that does not leave a membrane or film on the surface and has exceptional adhesion bonds with any coatings that may be applied later.

The one I use also has a 15 year waterproofing warranty which prevents contaminates from entering to bring chlorides and low pH conditions to an interior. This creates a No-Low moisture and high pH interior to prevent corrosion cell formation on embedded steel. Choose a sealer carefully and avoid any product that allows for a reapplication at a later date! [What happened to the First coat?] and one that has a 15 year warranty for Waterproofing. This will "Prevent" Efflorescence and a host of other problems you may encounter!

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Salary and Pay Rates
Civil Engineering
Bridges and Tunnels

What do bridge painters get paid?

most are prevailing wage jobs and greatly varies from state to state,im in the union so its a big difference . anywhere from 30 to 50 dollars an hour,again depending on what part of the country you are working

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Physics
Civil Engineering
Mechanical Engineering
Waves Vibrations and Oscillations

How would you describe vibration?

Vibration is the harmonic reaction of a structure to a force load.

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Miscellaneous
Civil Engineering
Concrete and Cement

Can you fix an asphalt pothole with concrete?

They have different modulus of elasticity. This would cause ces in thermal expansion and therefore fracturing of both materials.

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Inventions
Home Improvement
Civil Engineering

What is a concrete reinforcer?

Concrete reinforcer increases the strength of a concrete. It is designed to bond, strengthen, prime and seal concrete cement, plaster, stucco and masonry. It can be used to permanently bond new concrete to old concrete, or other surfaces such as wood, hardboard, brick, ceramic tile, concrete block and metal.

  1. It is used to prevent cement and group from cracking.
  2. Attach new concrete to old concrete and other surfaces.
  3. It can be used inside and outside of the houses
  4. Support for concrete to strong foundation
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Agriculture
Geography
Civil Engineering

What is the difference between Sandy Clay and Clayey Sand?

Their both the same, really, just two different names for sand with clay in it, however one might have more clay in one (sandy clay) than the other (clayey sand), but only by miniscule amounts.

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Electronics Engineering
Civil Engineering

What is the role of sociology in Engineering?

Nothing! Sociologists forcefully enforces it on engineers

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Engineering
Civil Engineering

What is the importance of sieve analysis?

Sieve analysis allows the determination of the distribution of particles sizes in granular materials. Since many separation processes and reactions depend on the amount of surface area relative to mass and that ratio increases as particle size decreases, knowing the distribution of sizes can be very important. Particle size distribution can also be important when using slurries to move particulates from one place to another.

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Mechanical Engineering
Civil Engineering

How many bar in 3000 psi?

204.08

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Civil Engineering
Mechanical Engineering

Definition of mass in engineering mechanics?

Mass is the measurement of inertia, or resistance to change in motion. It is not to be confused with weight, a measurement of the force due to gravity exerted on an object.

For many practical purposes, mass and weight vary numerically by a constant, namely gravitational acceleration. Due to the common misconception of mass and weight being the same thing, units can often get confusing. For example, the English unit for mass is the slug, rather than the pound (a unit of weight). Some unit systems, such as the American Engineering System, take up the convention of making mass and weight numerically equal. In such a case, the units specify whether mass or weight is intended, so you would have pound mass (lbm) and pound weight (lbw). The SI unit for mass is the kilogram (kg), which, like the pound, is commonly and erroneously used as a unit of both mass and weight.

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Civil Engineering
How To

How to prevent flash set OF CONCRETE?

You can add citric acid and sugar to stop hydration. But then the concrete is unusable and you need to throw it away.

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Civil Engineering

What is looped domain?

A looped domain is a series of chromatin fibres that are arranged into a loop. These are arranged into chromosomes. For more help view the related link.

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Civil Engineering
Bridges and Tunnels
Sydney Harbour Bridge

What are the advantages of a swing bridge?

The swing bridge has very long spans, and behaves better in earthquakes then heavy rigid bridges.

ANS 2 -Swing bridges can allow passage of very wide and high ships in a waterway.

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Civil Engineering

What is splice length of bar?

lap length in tension including anchorage value of hooks in flexural tension shall be greater of development length or 30 times dia of bar.

In compression, its equal to development length.

In general, 50 times dia is provided.

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Chemistry
Civil Engineering
Plastics and Polymers

What is High density polymer concrete?

What is Polymer concrete?

It is also known as resin concrete because synthetic resins are used instead of cement in its manufacturing.

Density of cement concrete
  • Density of normal concrete is in the order of about 2400 kg per cubic metre. The density of light-weight concrete will be less than 1900 kg per cubic metre.
  • To call the concrete, as high density concrete, it must have unit weight ranging from about 3360 kg per cubic metre to 3840 kg per cubic metre, which is about 50% higher than the unit weight of conventional concrete. They can, however be produced with the densities upto 5280 kg per cubic metre using iron as both fine and coarse aggregate.
  • The high density concrete is used in the construction of radiation shields.

Density of polymer concrete

  • Normally, the density of polymer concrete is not more than 2260 kg per cubic metre, when you use normal aggregates like granite stone chips and river sand as you do in standard cement concrete.
  • When you use aggregates obtained from iron ore or iron rod pieces, you can make high density polymer concrete upto 5140 kg per cubic metre.
287288289
Civil Engineering
Engineering

What major engineering blunders were results of faulty measurement?

  • The Great Kersten Blunder. (Kersten was the programer that made the error). The Vigor space probe was sent towards Venus, but because of a computer programing error installed on it, a convertion from millimeters to inches was incorrect. It divided by 24.5 instead of 25.4. This error caused it to miss Venus completely and was sent hurling into space. Over 2 billion dollars of technology was lost because of one simple error.
  • The Mars Climate Orbiter had a problem when trajectory programming teams from Europe and USA were working in two different measurement systems, imperial and metric. It missed the planet completely and was lost.
  • Not exactly engineering but it was an aviation blunder. An Air Canada flight was fuelled in Toronto using pounds instead of liters of fuel. The pilot calculated how much he needed thinking he was getting his fuel in liters and eventually ran out of fuel near Winnipeg. He successfully landed the plane safely at a semi-abandoned WW2 airstrip at Gimli Manitoba.
  • The Hubble Space Telescope or HST originally had an incorredtly ground mirror (Link below.)
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Civil Engineering

What is the difference between live load and roof live load?

Live load

Both are the same

Live load is all the live loads which can be consider as variable load.

Roof live load

This is limited to few categories. man who climbed on to the roof can be consider as roof live load.

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Civil Engineering
Mechanical Engineering
Bridges and Tunnels

Why do you have truss bridges?

Truss bridges are lighter than beam girder bridges. They take up more height but are strong and carry loadd in tension and compression rather than bending.

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Civil Engineering
Buildings
Bridges and Tunnels
Concrete and Cement

What is the concrete mixing ratio in m25 concrete?

The mixes of grades M5 M10, M15, M20 and M25 correspond approximately to the mix proportions (1:4:8), (1:3:6), (1:2:4), (1:1.5:3) and (1:1:2) respectively.

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Travel & Places
Civil Engineering
Bridges and Tunnels

What is a Pratt Deck Truss bridge?

the bridge having a deck from where truck n all vehicles pass by having a pratt which bridge is having...

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Civil Engineering
Buildings
Bridges and Tunnels
Concrete and Cement

What do you mean by M20 concrete?

In this M refer to Maximum compressive strength and 20 refer that concrete that with stand upto 20KN compressive strength.

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