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Slope stability is the process of calculating and assessing how much stress a particular slope can manage before failing. Examples of common slopes include roads for commercial use, dams, excavated slopes, and soft rock trails in reservoirs, forests, and parks.... (More)
The main reason behind the initial setting time of cement should not be less than 30 min is that the initial setting time is the exact moment when the concrete starts to harden. In theory, this time starts as soon... (More)
Your answer is totally hidden inside the geologist study.
In the geologist studying the land is determined whether it is stable enough to support the proposed project or not.
The outcrop is a visible exporter of ancient Bedrock.
The... (More)
Basic differences
| PCC | RCC |
| Plain Cement Concrete | R/f Cement Concrete |
| It doesn’t carry ‘Steel’. | It carries Steel. |
| PCC is weak in tension loading while strong in compression loading. | RCC is strong in both. |
| PCC blasts on excessive loading & in an instant w/t giving any warning. | RCC gives you enough time to vacate the structure before collapse. |
| Plain Cement Concrete | R/f Cement Concrete | |
| Tension | Steel tendons
High tensile steel bars Included with tension | Ordinary Mild Steel Deformed Bars
No tension included |
| Basic materials used | Min grade of concrete
Post-Tensioning → M30 Pre-Tensioning → M40 to resist high stresses
High strength steel to transfer large prestressing force | Min grade of concrete → M20
Steel → MS |
| Effectiveness of member | Entire section carries load | Does not carries load |
| Crack resistance | High
Cracks don’t occur under working loads | Less |
| Wt & suitability | Light
Heavy loads & longer spans | Heavy
Wt is more desired than steel |
| Equiments | Requires many specialized equiments
Pulling jack, Post-tensioning pump, Master wedges, Anchhor head & bearing | Doesn’t involve specialized equiments. |
| Quality of steel reqd | 1/3rd of RCC
More strength & less c/s area | More |
| Deflection | Very less | More |
| Load carrying capacity & Durability | More | Less |
| Shock resistance | More | Less |
| Yield | As high as 2100 N/mm2 | 200 – 300 N/mm2 |
| Testing | Testing of steel & concrete can be done while prestressing. | No way of testing the steel & concrete. |
| Cost | Economical for span of 10m – 18m.
As length of span gets ↑ Cost % ↑ C/s area of beam ↓ | Economical for span < 9m. |
Well, when we talk about an existing contract being then it’s not possible.
The answer can be best understood with the help of the bending moment diagram.
The moment of an integrated column is placed in the mid-span of an... (More)
Surplus weir (waste weir): It is a concrte or masonry structure constructed to dispose off excess water from an irrigation tank. It is a safety device in the tank.
Full tank level (FTL): It is the highest level up to... (More)
The pressure is zero when the soil voids are filled with air, and is negative when the voids are partly filled with water (in which case surface-tension forces operate to achieve a suction effect and the shear strength of the... (More)
Fine grained soils are classified based on the plasticity chart. The equation of A line is ;
Ip=0.73(liquid limit -20)
Ip=plasticity index
This is a very basic thing to understand. Tensile test is done on cylinders because only cylinders can be held under pure tension by applying a compressive load. You’ll see that a cylinder always breaks down the diametric plane and... (More)
Trigonometry is the best method which can be used to predict the height of the building without using equipment. But if possible than you can also ask to see the builders plan.
Hi,
I am a graduating student pursuing Civil Engineering. I will pass out my graduation in 2021.
I do online courses from renowned universities including IIT Kharagpur, IIT Madras.
By passion, I am a researcher in nanotechnology and like to... (More)
Absolutely Yes, factors of seepage are very important to determine before the construction of a dam or even after the construction of the dam for maintenance work.
Electrical resistivity method is used to determine the amount of seepage and depth... (More)
Porotherm bricks give a plethora of advantages over normal bricks :
Need for mix design:
Mix design is really very helpful to achieve an appropriate compressive strength of concrete. For achieving desirable workability of concrete without the occurrence of a defect in concrete like segregation and bleeding To enhance the durability... (More)
I would say that:
First, design lighting systems, to only shed light where it is required., instead of lighting up the night sky, and hide from our view, beautiful planets and stars. This can be done using well designed refractors.... (More)
Stucco is a portland and lime based product. For added strength and support we will sometimes mix bits of fiberglass strands in with the mud. The fiberglass acts as another structural support to make sure cracks stay away and no... (More)
Generally, for black cotton soil is also famous as expansive soil whose bearing capacity is less for suitability of spread footings and wall footings. So for black cotton soil mat foundation is most suitable. Mat foundation is recommended and also... (More)
Curing with Gunny bags will be preferred in this case. Thanks
