The Reduction of Construction Duration by Implementing Contour Crafting (3D Printing)

Construction methods are evolving daily due to the increasing challenges and complexity in projects which require fast, safe, and efficient methods to deliver their scope. Contour crafting (CC) is a 3D printing method developed for constructing big elements, it is based on printing the building layer by layer using special material ejection. This method promises an automated construction process that is safe, fast and reliable. 3D printing helps us make one step further towards lean principles by minimizing waste in construction duration and increasing Poka-Yoke (error-proofing) through activity automation. Furthermore, it guarantees an evolution in building textures that increases the quality of life for its residents without having a negative impact on public safety and welfare. In this paper we study the effectiveness of this technique in reducing construction duration using computer simulation and comparing the building of a house using the conventional construction method with the Contour Crafting method. Results give an overview of the potential of improvement in the construction field; and how waste can be reduced by the industrialization of the construction process which facilitates the implementation of lean philosophy. Findings suggest that contour crafting can reduce project duration by automating the construction process.