answersLogoWhite

0

🌎

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.

4,921 Questions

What is bulking of sand?

Bulking of sand means increase in it's volume due to presence of surface moisture . The volume increases with increase in moisture content . The volume may increase up to 20 to 40% when moisture content is 5 to 10 %.

Due to moisture in each particle of sand, sand gets a coating of water due to surface tension which keeps the particles apart. This causes an increment in volume of sand known as Bulking.

- Edited by KASEE SREENIVAS

# Hindustan Construction Company

What is Zero cost estimate in civil engineering?

You know, regardless of what specific data QB is relying on when filtering by an amount, the bottom line is that all other estimates show up, but this one project shows up with zero in the estimate cost column. It should not show zero, it should show the estimate amount. So, this isn't necessarily a matter of what data QB is pulling; it's a matter of why isn't QB showing the estimate amount like it does for all others? Why is it showing zero when there's an active estimate?

What are the advantages and disadvantages between post tensioned slab and pre tensioned slab?

post tension: the forces considered as outer force since pre tension forces are internal forces.

Can you take transfer from BSC civil engineering to BENG civil engineering?

I think if you get 60% overal in your first year you can progress to second year in BEng civil engineering.

Different between cube and cylinder in concrete compressive test?

The difference in compressive strength is due to the difference between the modulus of elasticity of concrete and that of the steel which is used to apply the compressive force on the concrete. The pressure applies a lateral confinement pressure which is equal to d/3 meaning that for the cylinder, 2d/3 is confined leaving d/3 unconfined whereas for the cylinder 2d/3 is confined means all of the cube is confined. This leads to the cube having a higher compressive strength that the cylinder. For more information, try to read about the triaxial test and the effect of confinement on the compressive strength of soil samples.

How to calculate head presure of a water tank?

Just measure the elevation of the max water height above the ground (or whatever reference level you wish to use).

What is epoxy mortar?

Epoxy resins are used with aggregate (silica sand) to produce epoxy mortar or epoxy concrete, which is used for structural repairs of concrete.

What does Fly Ash do to the strength of concrete?

  • Increases the strength of concrete.
  • It fill the pores in concrete thus strength is increases.
  • It is fine particle hence bonding capacity increases thus strength is increases.

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.

What is the advantage to laser leveling?

Laser leveling, when properly done, provides a much more accurate means of measurement than typical "bubble" type levels. Laser levels can often be used hands-free and project/provide a level line much farther than a typical bubble level.

What will be the effect on specific gravity of cement if some of the sample is lost after weighing?

There is no effect on the specific gravity if some of the sample is removed. The amount of mass will change, but it will still have the same specific gravity. It is basically a density. The specific gravity of 1lb of cement is the same as the specific gravity of 100lbs of cement, you just have more cement.

What is cost escalation in project management?

Cost Escalation is when the prices of services and/or goods increase over the term of the project. Cost Escalation is a risk in Project Management.

What is df beam?

good question! I will answer when i find out!!

How many bridges is there in derry and what are their names?

There are currently two bridges in Derry, the older is the Craigavon Bridge which was completed in 1933 and is the only bridge in the city proper. The bridge is also known as the "old bridge" locally, and is a double decker bridge carrying road traffic on both decks.

The second bridge is the Foyle Bridge, which is further north from the city, and is a four-lane dual-carriageway cantilever bridge and the longest in Ireland.

Currently under-construction (January 2011) is the yet to be officially named "Peace Bridge", which is located a few hundred metres north of the Craigavon bridge, and will be a pedestrian bridge when complete.

What does the CIRI Foundation do?

The CIRI foundation works with Native Alaskan people to help promote self-development and economic self-sufficiency. The foundation was established in 1982 by the Cook Inlet Region Inc.

What is the function of plies?

Plies are the construction materials use to make a tire. The body ply is a sheet consisting of one layer of rubber, one layer of reinforcing fabric, and a second layer of rubber. The earliest textile used was cotton; later materials include rayon, nylon, polyester, and kevlar. Passenger tires typically have one or two body plies. They can also be reinforced with steel. Body plies give the tire structure strength. Truck tires, off-road tires, and aircraft tires have progressively more plies. The fabric cords are highly flexible but relatively inelastic.

What happens if the yield stress and tensile stress of a steel bar is alomost the same?

Yield strength is the stress at which a material deforms plastically- basically, when you take the load off, it won't go back to the same dimensions it started at. Tensile strength is the stress at which the material breaks. In materials where the yield and tensile strengths are close numerically, like glass, there is a very small plastic range. These materials are thought of as brittle. In materials where the yield and tensile strengths are far apart numerically, like soft aluminum, there is a very large plastic range. One potential upside of a larger plastic range is that brittle failures are often catastrophic. A material with a larger plastic range can allow a part to be designed that will fail in overload by deforming until the part is unusable, rather than fracturing completely.

Why is glacial till unsuitable for building?

Glacial till is in fact very commonly used in building. It is over consolidated and so is very stiff making it a very good founding material as there is very little settlement.

This also means that it has a very high shear strength by the standards of soils so can be used to form very stable embankments and cuttings.

There can however be practical problems with the use of glacial tills as there may be large cobble and boulder sized clasts within the clay matrix which can make excavation of cuttings difficult and also hamper the driving of piles for deep foundations.

Also some clays (which may be present in glacial till) are more "active" than others. Activity in this context is a term used to describe their shrink swell potential, as some clays undergo significant volume changes depending on their moisture content. This can cause cyclical shrinking and swelling of the clay / glacial till depending on seasonal variations in rainfall and temperatures.

In embankments and cuttings, this deformation leads to a strain softening behaviour which can ultimately result in the formation of a slip surface causing a failure in slopes.

In founding materials composed of glacial till, this behaviour can lead to differential settlements that can cause damage to structures and underground services.

Where to leave construction joints in RCC slab?

construction joints are leave in RCC Slab one third of span.