Abstract
System form is widely used when constructing concrete buildings and structures because it has high productivity and good concrete casting quality compared with traditional hand-set form. However, from a worker’s perspective, system form is still very harsh to handle because of its heavy weight, noise generation, and use of releasing agent, and it also attenuates the productivity of system formwork. Therefore, this study proposes the use of an advanced composite material-based concrete form for workers using a Design for Six Sigma (DFSS) process to improve constructability of system formwork. User requirements are systematically reflected in the technical characteristics of concrete form, and innovative principles are scientifically organized through the DFSS process that mainly consists of quality function deployment and theory of creative problem-solving methods. The proposed composite form showed improved performance in deriving high-quality formwork and worker-friendly working conditions compared with previous system forms. Additionally, this study demonstrated how the DFSS will be a valuable tool for technology development and systematic decision-making in building construction.
Highlights
System formwork is a systematic support method for forming cast-in-place concrete structures in building construction until the concrete can support itself (Lee, 2019)
The composite system form (CSF) was compared with the existing system forms, aluminum forms (Al-form) and Euro form, and the following results were obtained (Table 11): 1. CSF is structurally safe during and after casting concrete and even has a reduced weight (12.9 kg)
CSF secures the high-quality concrete surface because the panel does not stick to concrete because of the laminate film coating on the panel, and its number of recycles is higher than the Euro form and the same as the Al-form
Summary
System formwork is a systematic support method for forming cast-in-place concrete structures in building construction until the concrete can support itself (Lee, 2019) It uses standard prefabricated modular units with various sizes of formwork panels. Some of the most widely used system forms in midand high-rise buildings are steel (Euro form) and aluminum forms (Al-form) (Kim, 2013) They have high repeat uses and are simple, cost-efficient, productive, and easy to handle (Liang, 2010). Despite their advantages, they are still heavy to carry and cumbersome to lift by hand (Chang-Yeob et al, 2010), which reduce formwork productivity.
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