What is in situ concrete?
Concrete poured into shutters which retain the concrete during setting into its final form and position is termed in-situ concrete. If the concrete is cast in locations which are different from the final positions it is referred to as precast concrete.
What is meant by cast-in-situ concrete?
Cast-in-place concrete or Cast-in-situ concrete is a technology of construction of buildings where walls and slabs of the buildings are cast at the site in formwork. This differs from precast concrete technology where slabs are cast elsewhere and then brought to the construction site and assembled.
What is the difference between precast concrete and in situ concrete?
The precast concrete is transported to the construction site, lifted and positioned at the predetermined place. The cast-in-situ concrete is a standard concrete which is poured into the specific formwork on the site and cured to get the strength of RCC elements.
What is in situ construction method?
In architecture and building, in situ refers to construction which is carried out on the building site using raw materials. In-situ is most commonly a mixture of aggregate (known as builder’s mix) blended with portland cement and clean water, that is free of oils, acid and others.
What is in situ concrete strength?
With the height of a concrete lift, in situ strength decreases towards the top of a lift, even for slabs, and can be 25% less at the top than in the body of the concrete. Concrete of lower strength is often concentrated in the top 300 mm or 20% of the depth, whichever is the less.
What is in situ condition?
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. [
Why precast concrete is better than cast in situ concrete?
ADVANTAGE OF PRECAST That means you can be more confident in the precision of the mold and fabrication along with the strength and consistency of the cast. Factory efficiency: In addition to quality control advantages, factory cast concrete is more efficiently manufactured, driving down costs.
What is in situ concrete skeleton frame?
An insitu reinforced concrete structure usually comprises a skeleton of columns, beams and floors or a ‘box’ of walls and floors. The concrete is reinforced with steel bars or mesh and is temporarily supported and contained by formwork during the setting and hardening process.
Why are precast concrete structures preferred to cast in situ?
The precast concrete method requires less time for onsite construction as compared to cast in situ concrete method. Because precast members are transported to site and can be directly lifted and placed on the desired position and there is no waiting for it to gain strength.
What is an insitu concrete slab?
In situ concrete floors are poured on site into temporary or permanent formwork, supported by walls or beams. They allow for great design flexibility. The internal walls can be positioned anywhere on the floor, irrespective of the room layout below.
What is in situ compressive strength?
Abbreviations used for compressive strength Characteristic in situ compressive strength (expressed as the strength of a 2:1 core of diameter ≥ 75 mm), i.e. the in situ compressive strength below which 5 % of test results are expected to fall if all the volume of concrete under consideration had been cored and tested.
What is concrete and its types?
Its uses range from structural applications, to paviours, kerbs, pipes and drains. Concrete is a composite material, consisting mainly of Portland cement, water and aggregate (gravel, sand or rock). When these materials are mixed together, they form a workable paste which then gradually hardens over time.