The Effectiveness Of Plastic Formworks In Construction
A new construction method replacing rigid formwork panels with flexible textile membrane that deflects under the dead weight of wet concrete, provide numerous advantages and opportunities for architecture, engineering, and construction technology in both advanced and basic building economies....
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Main Author: | |
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Format: | Monograph |
Language: | English |
Published: |
Universiti Sains Malaysia
2005
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Subjects: | |
Online Access: | http://eprints.usm.my/57561/1/The%20Effectiveness%20Of%20Plastic%20Formworks%20In%20Construction_Jam%20Isnain%20Lam.pdf http://eprints.usm.my/57561/ |
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Institution: | Universiti Sains Malaysia |
Language: | English |
Summary: | A new construction method replacing rigid formwork panels with flexible
textile membrane that deflects under the dead weight of wet concrete, provide
numerous advantages and opportunities for architecture, engineering, and construction
technology in both advanced and basic building economies. Inexpensive formwork
fabrics provide the options of sacrificial or reusable formworks in both precast and
cast-in-place applications. A method has been developed for fabric-cast foundation,
walls, columns, capitals, slab, and beam. Permeable membranes allow air bubbles and
excess mix water to bleed out, producing a flawless, cement-rich finish and stronger
and more durable “case hardened” concrete. Structurally efficient variable section
members are easily formed, reducing dead weight and material expenses. Most
formwork panels these days are faced with plywood. Plywood is sensitive to moisture
and can swell, warp and discolour the concrete surface. Plywood is difficult to clean,
is easily damaged in use, and can only be repaired at some expense and not without
visible traces. For several years now, formwork panels with plastic surface – mainly
made of polypropylene (PP) – have also been available on the market. Although these
overcome the problems associated with plywood, they are very sensitive to scratching
and in many cases, after only relatively few uses, are unable to guarantee a smooth
concrete surface. |
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