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MOHD RAHEEL ADNAN

VCE: 4/2 CIVIL

06-06-1019

SELF ASSEMBLING STRUCTURES

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Reinforced concrete shells are no longer fashionable. Space structures havetaken their place "under the spotlight" due to their multiple terrestrialapplications and potential extra-terrestrial uses. Yet, with the advent of construction automation, both these forms of structures will becomeincreasingly popular. This is due to their economy, simplicity, minimal useof material, and for their proven and lasting structural performance.

Eliminates the need for workers to operate in uncomfortable and hazardousconditions, while concurrently saving time, reducing costs and improvingthe quality of the work place in the construction industry. It is well knownthat in spite of the employment of sophisticated machinery and equipmentand some recent efforts to improve on-site working conditions, constructionsites in general offer some of the worst working conditions existing today.As has already been experienced in other industries, the application of

automation and robotics can cuts costs, environmental pollution, and

Construction automation:

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dramatically improves safety and quality control to the benefit of livingstandards in general.

The Binishells are construction technologies based on the

principle of using air pressure to lift and shape concretethat has been poured onto a flat membrane at or nearground level. This radical building philosophy was introducedby Dr. Dante Bini in the 1960s. Since then more than 1,600Binishells have been built in 23 countries.Binishells rangefrom large, free form domes and roofing structures, toinverted ellipses, to small square based low cost housingunits.

all Binishells are fast to erect, inexpensive to build,inherently strong, inherently green, and naturally energyefficient .

The Binishells Systems all deploy the simple but powerfulpatented concept of using air pressure to lift and shape areinforced concrete shell, which is poured at ground level.Depending on the technology, different shapes, reinforcingtechniques are used. All the Binishell Systems utilizetraditional re-bar captured within steel springs to reinforceconcrete. The basic construction principles are illustratedbelow.

Foundation

The site (1) is excavated as is necessary. Areinforced concrete ring beam (2) is poured at theperimeter of the building. The ring beam isconnected to a slab on grade (6) via traditionalrebar (3). A temporary pneumatic form (4) is usedto create a pneumatic anchor for the finalmembrane.The inflation pipe (5) is positioned.

AN INTRODUCTION TO BINISYSTEMSTECHNOLOGY

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Membrane and pumps

The temporary pneumatic form (1) is removed The final pneumatic membrane (2) is laid in the

groove created by the temporary form. The inflationpipe (3) is secured The pumps (4) are tested as isthe pneumatic seal of the membrane Shel l

reinforcements

With the membrane (2)secured to the ring beam (1)metal springs (4) arestretched from anchorpoints (3).

Traditionalreinforcement bars (5) arethreaded into the springs.

Concrete pour

Wet concrete (1) is poured at ground levelonto the springs and troweled by traditionalmethods.

Inf la

tion

With low air pressure theentire assembly is inflated tothe final desired shape.

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Stabilization

The pressure and shape arestabilized through the use of air inlet and outlet pipes (1).

Trowling

The wet concrete shell is troweled by hand.

Final setting

The membrane (3) is re-foldedand recovered (1). The desiredopenings (2) are cut out of theshell and their edges reinforcedand finished as is necessary (4).

Air lift concrete domes:-

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In only three hours, a dome 12 m. in diameter and 6 m. In height had been pneumatically liftedfrom the ground and shaped into an hemispherical thin shell structure

This patented method of construction, in approx. 60-120 minutes, producescircular-based, monolithic, reinforced concrete shell structures, with ellipticalsection, ranging in size from 12 to 40 metrs in diameter. Over 1,500 buildingsare in use in 23 Countries.

Binishells Systems have the following inherent qualities:

They use the least possible material to enclose thegreatest volume.

They are made only from readily available and recyclablematerials (concrete and steel).

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They are inherently strong and highly resistant toearthquakes, hurricanes and other natural disasters.

They utilize the minimum man power, machinery and timefor construction.

They can easily be designed to provide extremeefficiencies in energy use.

They can utilize fly ash concrete which reduces our solidwaste problems and reduces overall energy use in makingconcrete.