Prestressing can
reduce the volume of concrete required in construction
, lowering the use and transportation of materials, as well as boosting durability and service life. Concrete is intrinsically resistant to compressive stresses, but its resistance to tension is much lower.
What are advantages and disadvantages of prestressed concrete?
- Longer span length increases untroubled floor space and parking facilities.
- Thinner slabs, that are important for high rise building as with the same amount of cost, it can construct more slabs than traditional thicker slabs.
What are the advantages and disadvantages of pre tensioning?
1) The cross-section is utilized more efficiently in pre-stressed concrete as compared to reinforced concrete. 2) Pre stressed concrete allows for a longer span. 3) Pre-stressed concrete members
offer more resistance against shear force
.
What are the advantages of prestressed concrete sleepers?
Answer: Advantages of Prestressed Concrete: Prestressed concrete members are
free from cracks and the resistance to the effect of impact, shock
, and stresses are higher than rcc structures. Longevity of prestressed structure is greater than rcc structure because the reinforcement stays unaffected from outer agencies.
What are the advantages of prestressed concrete?
Prestressing can
reduce the volume of concrete required in construction
, lowering the use and transportation of materials, as well as boosting durability and service life. Concrete is intrinsically resistant to compressive stresses, but its resistance to tension is much lower.
What is the disadvantage of concrete?
The following are the disadvantages of concrete :
Due to low tensile strength, concrete is required to be reinforced to avoid cracks
. In long structures expansion joints are required to be provided if there is large temperature variance in the area.
What are the disadvantages of reinforced concrete?
- The tensile strength of reinforced concrete is about one-tenth of its compressive strength.
- The main steps of using reinforced concrete are mixing, casting, and curing. …
- The cost of the forms used for casting is relatively higher.
What is the principle of prestressed concrete?
The principle behind prestressed concrete is that
compressive stresses induced by high-strength steel tendons in a concrete member before loads are applied will balance the tensile stresses imposed in the member during service
.
Which is better pre tensioning or post-tensioning?
This method is developed due to the bonding between the concrete and steel tendons. This method is developed due to bearing. Pre-tensioning is preferred when the structural element is small and easy to transport.
Post-tensioning is preferred
when the structural element is heavy.
Why prestressed concrete is used for long span?
Prestressed concrete is a form of concrete used in construction. … Prestressed concrete is used in a wide range of building and civil structures where
its improved performance can allow for longer spans
, reduced structural thicknesses, and material savings compared with simple reinforced concrete.
What are the advantages of post tensioning?
- It reduces or eliminates shrinkage cracking-therefore no joints, or fewer joints, are needed.
- Cracks that do form are held tightly together.
- It allows slabs and other structural members to be thinner.
- It allows us to build slabs on expansive or soft soils.
What are the limitations of prestressing?
- Prestressed concrete requires high-quality dense concrete of high strength. …
- It requires high tensile steel, which is 2.5 to 3.5 times costlier than mild steel.
- Prestressing process requires complicated tensioning equipment and anchoring devices.
What is the difference between RCC and prestressed concrete?
Prestressed concrete sections
are thinner and lighter than RCC sections
, since high strength concrete and steel are used prestressed concrete. In prestressed concrete, whole concrete area is effective in resisting loads, unlike RCC where concrete below the neutral axis is neglected.
Is concrete strong in tension or compression?
Concrete is a non-linear, non-elastic and brittle material. It is
strong in compression
and very weak in tension. It behaves non-linearly at all times. Because it has essentially zero strength in tension, it is almost always used as reinforced concrete, a composite material.
What are the advantages of concrete sleepers?
- Strong stability. Compared with wooden sleeper, concrete sleeper with extra weight makes track more stable. …
- Long service life. …
- Better withstand fire hazards. …
- Good insulation. …
- Low maintenance cost. …
- Environmental protection.
What is the main disadvantage of steel sleeper?
Disadvantages of Steel Sleepers
It is liable to corrosion.
Cracks at rail seats develop during the service.
