Pre cast system in Developing countries

Pre cast system in Developing countries

In Developing countries, the method of application of pre-cast system is a bit completely different and simple, all concrete structural part (such as slabs, beams, columns, wall panels and footings) are made in vast fashionable factories. In these factories there are heaps of automatic central concrete mixers, completely different material containers, cement silos, water tanks. For manufacturing formed units of various varieties and kind works, there are many production areas, several steel beds (steel formwork) with hydraulic jacks and overhead electrical cranes. The concrete mixes that area unit made for formed units, area unit of various varieties and strengths. The strategies of hardening area unit heaps, like electrical water pipes, new steam hardening systems, additionally hot air hardening rooms. There are many varieties of slabs made .Hollow core slabs with traditional ferroconcrete, for tiny and medium spans, hollow core slabs with pre-stressed concrete for giant spans up to twenty four meters. The tactic of production of such slabs is by exploitation extruding machine. There are different varieties of slabs, like T and double T slabs, giant panel slabs, and post tension block column affiliation. There are many varieties of formed beams, born ferroconcrete linear and sinuate formed beams, with little and medium spans, beams with pre-stressed concrete for giant spans. There are differing types of a hundred and fifty five formed columns with completely different sections and forms, with and while not corbels. Additionally there are differing types of formed footings, like single, double, strip, and raft foundations. The transportation of the formed units used area unit trailers, helicopters and large trucks. The erection method within the website relies on exploitation terribly fashionable technology strategies, like helicopters, vast tower cranes and Lift-slab system (floor by floor rebellion), automatic cranes, the erection may be achieved for 2 or 3 floors along. The buildings that are made in developed countries area unit of all kinds, low-rise, medium, and high-rise buildings up to thirty floors. In developing countries, per the person’s low financial gain, moderate climate, straightforward below structure and developing technology (technology transfer), the tactic that is used is incredibly straightforward and ancient. All formed ferroconcrete structural part (such as slabs, beams, columns, wall panels and footings) area unit made in little factories. In these factories there are little concrete mixers (solely one or 2 central mixers), material containers, cement silos, water tanks, that ends up in cut back the price of construction. For manufacturing formed units of various varieties and forms, there are just one or 2 production areas, heaps of steel beds with mechanical or little hydraulic jacks, one or 2 overhead cranes. The concrete mixes that area unit made for formed units, area unit of completely different varieties and strengths. The strategies of hardening area unit ancient, like wet Wellington boot, or water hardening. There are some varieties of slabs made: Hollow core slabs with traditional ferroconcrete, for tiny spans, hollow core slabs with pre-stressed concrete for medium slabs up to seven meters solely. The methodology of production of such slabs is by exploitation extruding machine. There are different varieties of slabs, like T and double T slabs. There are one or 2 varieties of formed beams made. Ferroconcrete linear formed beams, with little and medium spans up to 20metrs. There are differing types of formed columns with completely different sections and forms, with and while not corbels. Additionally there are some varieties of formed footings, like single, double, and strip foundations. The transportation of the formed units used area unit solely trailer that’s cheap. The erection method within the website relies on exploitation little technology strategies, like little cranes or straightforward cables, and also the erection is for one floor solely (step by step). The buildings that area unit made in developing countries area unit of low-rise buildings (five floors maximum) that’s not costly. because the individuals in developing countries (such as in Arab countries); area unit terribly poor (low income) , the climate is traditional in winter , and also the price of hands and instrumentation area unit low , it’s helpful to scale back the price of buildings by exploitation the Pre-cast construction because of : Short time of construction, Low cost, and increasing the building sturdiness and utility.