Precast concrete is made in a plant and shipped to a site as individual units. … Cast-in-place concrete, on the other hand, is mixed and poured directly into a mold on-site. Think of this as the more “traditional” style of concreting, where cement trucks arrive on-site and workers pour out the mix into a specific area.
What is the meaning of in situ concrete?
cast-in-place concrete, in situ concrete
Concrete which is deposited in the place where it is required to harden as part of the structure, as opposed to precast concrete.
What does in situ construction mean?
in situ in American English
a. in place or position; undisturbed.
Which is better in situ or ex situ?
In situ conservation offers greater mobility to the animal species being safeguarded in its habitat. Ex situ conservation provides less mobility to the organisms due to relatively smaller habitat or area than the in situ.
What is the meaning of in situ and ex situ?
In-situ means being in the original position; not having been moved. Ex-situ means offsite conservation. It is onsite conservation or the conservation of genetic resources in natural populations of plant or animal species.
How is in situ concrete done?
5.2.
Unlike precast units, in situ concrete is poured in its permanent location (Fig. 5.16) and offers a much more robust solution. If constructing a wall, for example, its reinforcing bars are assembled first, then shuttering or formwork erected around them and finally concrete poured into whatever space remains.
Is in situ concrete sustainable?
The choice of precast concrete in a building or structure means that resilience is built in. … Precast concrete offers significant sustainable benefits in these areas.
Where is situ concrete used?
use in building construction
building site; this is so-called in situ concrete. The other method is called precast concrete, in which building components are manufactured in a central plant and later brought to the building site for assembly.
What are the disadvantages of precast concrete?
Disadvantages of Precast Concrete
- If not properly handled, the precast units may be damaged during transport.
- It becomes difficult to produce satisfactory connections between the precast members.
- It is necessary to arrange for special equipment for lifting and moving of the precast units.
What are the advantages of prefabrication construction over cast in situ?
Precast construction system has advantages over castin-situ system on many aspects: less on-site construction time, less curing time, less energy and water consumption, lower environmental impact and lower overall construction cost .
Why precast concrete is better than cast in situ concrete?
COMPARING PRECAST VS. SITE CAST CONCRETE. Quality control: Because precast concrete is mixed, poured and cured in a factory, ideal conditions and exacting measurements can be maintained throughout the process. … Labor efficiency: Precast is much more labor efficient.
What does situ mean in medical terms?
(in SY-too) In its original place. For example, in carcinoma in situ, abnormal cells are found only in the place where they first formed.
What is in situ condition?
In-situ conditions means conditions where genetic resources exist within ecosystems and natural habitats, and, in the case of domesticated or cultivated species, in the surroundings where they have developed their distinctive properties.
What are the disadvantages of concrete?
Disadvantages of Concrete
- Compared to other binding materials, the tensile strength of concrete is relatively low.
- Concrete is less ductile.
- The weight of compared is high compared to its strength.
- Concrete may contains soluble salts. Soluble salts cause efflorescence.
Why is precast concrete sustainable?
Precast concrete speeds up construction times and considerably reduces the environmental impact of a build. A precast project means less time on site, less equipment, less third party trades and a cleaner, safer site with less waste and less disruption to surrounding properties.
Is reinforced concrete sustainable?
Hence reinforced concrete uses different materials very efficiently. This minimisation of material use is often taken for granted but is a major contributor to sustainability. … The steel used in UK reinforced concrete utilises 100% recycled scrap steel as feedstock.
Is in situ Latin?
In situ is Latin for “in place” or “in position.” In medicine, it may also mean “localized.” The term is used in both surgery cases and cancer diagnosis and treatment.
Are concrete houses Mortgageable?
Yes, getting a mortgage on a concrete construction property is certainly possible. … Most mortgage lenders will view concrete construction houses as unreliable security as they cannot be certain that they will be able to sell it and recoup their mortgage without soo much cost to them.
How do you cast-in-situ?
Cast-in-situ is the conventional method of concreting. In this Method concrete is prepared on the site and poured in formwork and then cured. It often requires more labours and even takes longer time. Precast concrete is the new method concreting used all over the world extensively.
Which is the example of ex situ conservation?
Complete answer: Ex situ conservation is the conservation of areas outside their natural habitat. Botanical gardens, zoological parks, seed banks, cryopreservation, field gene banks, etc. are examples of it.
What is the difference between in situ & ex situ conservation?
The difference between in situ and ex situ conservation is that In-situ conservation connotes the act of conserving wildlife species in their natural habitats of growth. On the other hand, ex situ conservation refers to the efforts of safeguarding wildlife species outside their natural habitats and environments.
What do you mean by ex situ?
Introduction. Ex-situ (‘off site’, ‘out of place’) conservation is a set of conservation techniques involving the transfer of a target species away from its native habitat to a place of safety, such as a zoological garden, botanical garden or seed bank.