The concept, the importance of formwork
Formwork is the temporary wooden molds, metal, or other materials are processed to produce structural shapes of concrete or reinforced concrete. After the concrete hardens them removed taken to use on other projects. Formwork is a construction tool is necessary and important for casting concrete in the field as well as in the factory. So when manufactured, used formwork to meet certain technical requirements.
Formwork has two main functions:
– Anti-thrust of wet concrete and geometry ensure the design of concrete structures;
– Decision quality concrete surface.
Formwork is positioned placement designed by scaffolding, or other means of resistance.
The majority of formwork made of wood or metal, are manufactured in factories, workshops or on-site construction. Though created where formwork must also meet the following key requirements:
– Must be made in accordance with the size of the structural parts of the work;
– Must be reliable, hard, stable, not bent, buckled;
– Must be a compact, handy and easy disassembly;
– Must be used multiple times. For timber formwork to be used 3-7 times; metal formwork to be used from 50-200 times. To use many times, after finished will be scraped clean; and apply grease to the metal formwork, store them in a dry place
Formwork is the temporary works, mostly just for the concreting without holding back at work. Within, hardened concrete grout mixture gradually. Once the concrete reaches strength allows, falsework is removed. There are cases where formwork is not removed but left in the structure (called falsework and formwork up dead).
Formwork affect the execution time, the cost of construction quality. Many designers are only interested in the selection of building structures so that the cost of concrete and steel materials down the most, but do not focus on the elements of formwork and concrete construction molding methods. In some parts of the work, formwork funding for higher funding for supplies of concrete and steel parts that work.
Formwork though only a visual structure and fight temporarily removed, but the design still have the responsibility to create a temporary structural system that should ensure solid, stable and safe. There have been cases of formwork fallen, while concrete pools, or tornado evaporating formwork system. Any incident of Formwork small though construction delays, increase costs and cause accidents works for people.
Formwork components including side games, hardware and accessories slopes links.
– Game face is the direct contact with concrete, decide the shape, size and surface texture quality.
– Hard ribs, associated with side planks, strengthening of formwork.
– Accessories links used to link together the formwork panels in the same plane or in different planes, associated with system formwork prop.
