Civil Engineering

stonemasons!

The ancient Mayan built pyramids.

Dry lean concrete is used as a sub base for structural concrete. It contains much less cement and more sand compared to structural concrete.

Bridges were ivented for the simply reason...to get over them. Bridges that go across lakes,rivers,any land of water were created so that you can get over without having to get in a boat and travel among the water. Its common sense, i have not researched this so no promises but i have learned this in school, And like i said its simply common sense.

The Civil Engineering Data Standards manual states the density of many grades of concrete. Standard density for fresh M-25 concrete is: 2414 Kg/ M3.

mainly two types of Vibration measurement: shaft vibration Bearing Vibration

I think so. But who am I to tell u wat to do..

Green sand is a mixture of sand with bentonite clay, pulverized coal, and water used in metal casting. It is not necessarily green in color, but is called green because it is used while wet, like the "green wood" sometimes used by wood turners.

Shubham Kanungo

Asst Professor

Department of Mechanical Engineering

Shri Vaishnav Institute of Technology and Science,Indore

•The lowest portion of the building structure.Usually located below the ground level.

•A foundation is a part of the structure which is in direct contact with the ground to which the loads are transmitted.

The arbitary limit of water content that represents the boundary between the liquid & plastic state is called as liquid limit.

importance of civil engineers in Nigeria is to help improve in certain sectors of the nigerian economy and also in construction of infrastructures to improve the life style of its native

The tallest building in the world (completed) is the Burj Dubai, As of July 20 2009.

It is now known as the Burj Khalifa

That depends on the concrete, as well as weather conditions, and the load the concrete would be subjected to. Concrete gains strength over time and the usual benchmarks are 7 days, and 28 days. At 28 days concrete has usually cured to nearly its maximum strength. For a concrete footing in a residential environment say a deck or home the concrete will usually cure for a minimum of three days before the formwork is removed and the rest of the structure is built. For a commercial or civil project the curing is subject to the engineers discretion.

As it has been explained to me there only purpose is to support and separate the rebars in their respective locations. Other than that, they are doing the same thing as wire mesh... displacing concrete.

Building engineer is concerned with only buildings, but civil engineer can deal with all the streams of civil engineering viz as irrigation, enviornmental engg, transportation engg geotechnical engg etc......

On a dry day, a couple of hours, on a humid day you might want to wait until 24-36hrs. later.

PSI = Pounds per Square Inch. Bar - is one atmosphere (14 PSI)

Many Engineering Geologists work with geophysical companies or engineering firms that deal with geotechnical engineering (slope stability, foundation engineering, retaining wall design, tunnelling) as well as the more traditional engineering geology roles such as rock slope design and assessment, rock tunnelling, quarrying and mining. These professionals are also found in positions in the government such as the USGS or in academics.

Neither tensile strength nor compressive strength is inherently "stronger." Some materials are stronger in tension; other materials are stronger in compression. For example, rope is much stronger in tension than in compression, but concrete is much stronger in compression than in tension.

It has to do with the design of the bolts. The reason that head of the bolt is oval in shape. The head of a bolt fit flush into the bar and set in opposing sets is so that a piece of dragging equipment will not shear off all the bolts in a joint but rather the just the nuts one side. As a result if the hole is not oval on one side there would be no way to tighten or loose the bolts in a joint.


Second Answer: They would be oval shapes so when contraction or expansion happens they wont snap.

Fineness Modulus is used to know the size of aggregate grains (Particles) for various measurements used in Civil Engineering.

To characterize the overall coarseness or fineness of an aggregate, a concept of fineness modulus is developed. The Fineness Modulus is defined as

Fineness Modulus =

Σ(Cumulative Retained Percentage)

100

To calculate the fineness modulus, the sum of the cumulative percentages retained on a definitely specified set of sieves needs to be determined, and the result is then divided by 100. The sieves specified for the determination of fineness modulus are No. 100, No. 50, No. 30, No. 16, No. 8, No. 4, 3/8", 3/4", 1.5", 3", and 6".

Mirza Usman

http://www.facebook.com/Mirza.Usman.Blogger

A Cantilever bridge is built from iron, structural steel and prestressed and reinforced concrete. These materials make the trusses, box girders, vertical columns and the canitlever itself.

dis advantage of ordinary portland

The fear of bridges or of crossing them is Gephyrophobia.

http://www.youtube.com/watch?v=cEL7yc8R42k

^ a very good video summary on Hydroelectric power

Basically water flows through the dam and through a turbine. This spins the turbine, which in turn spins a generator. The generator creates electricity by having magents go around copper.