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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 welded wire mesh used in concrete?
IT helps strengthen the concrete and prevent cracking
But please note usually the "welded wire mesh" used in concrete is named reinforcing mesh, its wire is ribbed. And the wire of welded wire mesh in industry usually is plain, it used for fence panel, floor heating system and so on.
The following are reinforcing mesh and welded wire mesh link.
dingzhenfence.com/product/Welded_Wire_Mesh.html
dingzhenfence.com/product/Welded%20Wire%20Mesh
What is the difference between Bending and Direct Stress?
-> when a structural body gets deviated from its original position or from its centroidal axis due to externally applied load,then it is termed as BENDING
->DIRECT STRESS is the stress which act normal to the plane
-> stress and bending are the two different things. stress produced by load per area & bending is the effect produced by load and stress.
Definition of moment of resistance of beams?
thats means load
In some countries (Greece for sure) by "moment of resistance" we mean Section Modulus, which is Z=I/y, where I: moment of inertia, y: distance from the neutral axis to the most extreme fibre
What is the difference between box culvert and pipe?
Basically, a culvert means a covered hydraulic structure which conveys fluid. Therefore in a broad sense, pipe culverts in a small scale represent normal pipes like precast concrete pipes.
In terms of hydraulic performance, circular section is the best geometrical sections among all. Therefore, for relative small discharge, precast concrete pipes and ductile iron pipes are normally used which are circular in shape. But for applications of very large flow, precast concrete pipes and ductile iron pipes may not be available in current market. In this connection, cast-in-situ construction has to be employed. It is beyond doubt that the fabrication of formwork for circular shape is difficult when compared with normal box culvert structures. However, circular shape is the most hydraulic efficient structure which means for a given discharge, the area of flow is minimum. Therefore, it helps to save the cost of extra linings required for the choice of box culverts.
However, box culverts do possess some advantages. For example, they can cope with large flow situation where headroom is limited because the height of box culverts can be reduced while the size of pipe culverts is fixed. Secondly, for some difficult site conditions, e.g. excavation of structure in rock, for the same equivalent cross-sectional area, the width of box culverts can be designed to be smaller than that of pipe culverts and this enhances smaller amount of excavation and backfilling
J. C. Bamford, a British manufacturer of heavy industrial and agricultural vehicles; hence JCB can also mean a backhoe digger/excavator in Britain and Europe
See http://en.wikipedia.org/wiki/J._C._Bamford_(person)
The advantages and disadvantages of groundwater over surface water?
1.groundwater donot evaporate
2.available throughout the year
3.in arid,semi arid scanty rainfall areas ground water is good choise
If the test is set to load-control , it means that the stress will not drop once the fracture become unstable. In displacement control the stress may drop at unstable fracture.
What will be minimum covering for roof slab?
The minimum covering of reinforcement for roof slab is 30mm
How do you convert compressive strength to flexural strength?
the compressive strength can be converted in to flexural strength by following formula of IS code 456-2000fcr=0.7^/- fck
fcr= flexural strength
fck= characteristic compressive strength in N/mm2
In construction of brick wall why rcc bed is constructed?
It is not always mandatory that we will have a RCC bed below any brick wall. In ground floor without basement the brick wall stands on common concrete slab not RCC slab, in other floors slab has to be made of RCC, hence brick wall stands on RCC.
In which situation doubly reinforced beams used?
when our demand is more than capacity then designer prefers to choose doubly reinforced beam .for example your maximum moment is greater than nominal momentthen doubly reinforced beam is used.
32 c2 mix is cocncrete made out of :
340 Kgs of Portland
1150 Kgs of Lime Stone
1000 Kgs of sand , chemicals and water !!
Anything which is supporting to a beam or column to eliminate the buckling failure due to high deflection and unbalanced eccentric load
What is MC-1 primer for asphalt?
MC-1 primer for asphalt is a common solvent used for roadways and pavements. It is commonly used as a base application.
How would you describe the process of concrete setting?
Concrete setting is initiated by a process called hydration. Rather than the concrete just 'drying out', the hydration process involves the water added to the materials (stone, sand & cement) reacting with the cement. The water reacts with calcium in the cement to form an alkali paste which bonds the materials together. Adding too little water means not enough cement hydrates to set properly, but too much will cause separation of the materials.
