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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.
4,921 Questions
Why is beach sand not suitable for concrete designing?
Sand from a beach is contaminated with all sorts of chemicals that will cause severe deleterious reactions to a concrete paste. If we are speaking of sand from an ocean environment the salt [Chloride] content is around 4%.
Chlorides commence corrosion cell formation on embedded steel reinforcement in a matter of hours. With corrosion comes rust which expands the volume area of the steel. As the steel corrodes and expands the expansion causes a concrete to crack. When a crack becomes larger it allows even more chlorides moisture and oxygen free access to the steel which corrodes even faster. A design using beach sand is a prescription for concrete failure.
Attempts at washing a beach sand are futile. Structures built with beach sand are doomed from the day they are poured
TMX steel is a high quality QST bar. Thermex technology is used for this. Thermex bars, unlike CTD bars, have a proven record resisting loss of strength at high temperatures as experienced during fires. Quenched & Self Tempered (QST) steel, can be described as a new-generation-high-strength steel having superior properties such as weldability, strength, ductility and tensile strength, which meets the highest international quality standards. Both Thermex and TMX are trademarks owned by H&K Rolling Mill Engineers Pvt. Ltd. in India.
What are the different types of columns in civil engineering?
Based om types of reinforcement
1) Tied Columns
2) Spiral Columns
Based on type of loading
1) Columns with axial loading
2) with uni axial eccentric loading
3) with bi axial eccentric loading
Based on Slenderness Ratio
1) Short Columns (lx/D and ly/b <12)
2) long(Slender) Columns
Why use working stress method for water tank design?
i think , because water tanks are more vulnerable structures and plus the tank is sometime overfilled and sometime empty, the pressure inside is so varying,
its needs more safety precautions and as we all know working stress method assumes more safety factor than limit state design, which is an economical design, we prefer to use working stress method...
What is supplementary cementitious material in concrete?
Supplementary cementitious materials are the mineral admixtures consisting of powdered or pulverized materials which are added to concrete before or during mixing to improve or change some of the plastic or hardened properties of Portland cement concrete.
Is the camelback bridge the same as the crescent truss bridge?
you can check this out link below-
its about Truss Bridges
The difference is the terminology used in this aspect. original and natural is relevant to each other.
The timeline of natural is ancient and original is modern times. but when it comes to levels it has the same meaning.
How many ton are in CY asphalt?
I use a conversion factor of 152 pcf (pounds per cubic foot) for asphalt, as a general rule of thumb. For a CY, multiply by 27, to get 4,104 pcy (pounds per cubic yard) of asphalt.
Where to download autocad 2006 full version?
Autocad 2006 is obsolete. Go to the autodesk web site (www dot autodesk dot com) and buy a copy of the 2010 version.
Any other path to obtaining licensed software is illegal and WikiAnswers will not give out that kind of information.
Need for corner reinforcement in two way-rectangular slabs?
Torsion reinforcement provided at the corner of two way slab to control cracking at corners.
Where can I find more information on prismatic compasses?
http://www.wisegeek.com/what-is-a-prismatic-compass.htm
Please re-write that in simple form so we can understand. Don't try to make the longest sentence that you can.
What causes due to overlap of bulb of pressure in soil mechanics?
The force exerted by pad footings, known as applied force...in natural fact, there is a shear force present 45deg. to the vertical of the footing. When the shear forces are projected and touch those of another footing placed on the ground, then its referred to as overlapping in which it means that in that area, the soil investigation should be carried out deeper that the usual values vertically below the proposed footings.
What is the difference between reinforced concrete and pre stressed concrete?
Reinforced concrete has reinforcing bars (called rebar) simply embedded in the pour. With prestressed concrete, reinforcing rods or cables are stretched (stressed) and then the concrete is poured around them. After the concrete hardens, the tension on the reinforcing members compresses the concrete, making it more resistant to failure where poor soil conditions or severe loads exist.
Prestressed construction is usually done in-plant because of the equipment involved, and the completed assembly shipped to the site for installation.
A similar method, called post-tension, is usually done on site, and involves the tensioning of reinforcing cables after the slab is poured, using a special hydraulic jack.
Tricalcium silicate(C3S) ALITE (gives early strength to cement....heat of hydration is 120 cal/gm)
Dicalcium silicate(C2S) BELITE (gives later strength ie after 7 days...less heat of hydration)
Tricalcium aluminate(C3A) CELITE (gives INITIAL strength...high heat of hydration ...320 cal/g)
Tetracalcium alumino ferrite(C4AF), FELITE (very high heat of hydration)
- K @ $ !
civil engineering... GITAM UNIVERSITY
Why are triangles used in truss bridges?
Triangles are used in trusses to make the unbalanced foces zero in theory.Practically, some unbalanced force remains but it is minor and can be neglected.
