3DK Competence Center Investigates the Potentials of Contour Crafting

2021 ◽  
Vol 70 (4) ◽  
pp. 28-35
Author(s):  
Lee Klein ◽  
Florian Holleyn ◽  
Sinje Zimmer ◽  
Olaf Krause
Keyword(s):  
Contour Crafting

scholarly journals An Overview on the Rheology, Mechanical Properties, Durability, 3D Printing, and Microstructural Performance of Nanomaterials in Cementitious Composites

Materials ◽  
2021 ◽  
Vol 14 (11) ◽  
pp. 2950
Author(s):  
Hongwei Song ◽  
Xinle Li
Keyword(s):  
Mechanical Properties ◽  
3D Printing ◽  
Three Dimensional ◽  
Cementitious Materials ◽  
Research Area ◽  
Cementitious Composites ◽  
Split Tensile Strength ◽  
Contour Crafting ◽  
Wide Range ◽  
Active Research

The most active research area is nanotechnology in cementitious composites, which has a wide range of applications and has achieved popularity over the last three decades. Nanoparticles (NPs) have emerged as possible materials to be used in the field of civil engineering. Previous research has concentrated on evaluating the effect of different NPs in cementitious materials to alter material characteristics. In order to provide a broad understanding of how nanomaterials (NMs) can be used, this paper critically evaluates previous research on the influence of rheology, mechanical properties, durability, 3D printing, and microstructural performance on cementitious materials. The flow properties of fresh cementitious composites can be measured using rheology and slump. Mechanical properties such as compressive, flexural, and split tensile strength reveal hardened properties. The necessary tests for determining a NM’s durability in concrete are shrinkage, pore structure and porosity, and permeability. The advent of modern 3D printing technologies is suitable for structural printing, such as contour crafting and binder jetting. Three-dimensional (3D) printing has opened up new avenues for the building and construction industry to become more digital. Regardless of the material science, a range of problems must be tackled, including developing smart cementitious composites suitable for 3D structural printing. According to the scanning electron microscopy results, the addition of NMs to cementitious materials results in a denser and improved microstructure with more hydration products. This paper provides valuable information and details about the rheology, mechanical properties, durability, 3D printing, and microstructural performance of cementitious materials with NMs and encourages further research.

Deformation Analysis of Sulfur Concrete Structures Made by Contour Crafting

2015 ◽  
Author(s):  
Behrokh Khoshnevis ◽  
Xiao YUAN ◽  
Behnam Zahiri ◽  
Jing Zhang ◽  
Bin Xia
Keyword(s):  
Concrete Structures ◽  
Deformation Analysis ◽  
Contour Crafting

Contour Crafting

2006 ◽  
pp. 221-251 ◽  
Author(s):  
Behrokh Khoshnevis ◽  
Dooil Hwang
Keyword(s):  
Contour Crafting

Construction by Contour Crafting using sulfur concrete with planetary applications

2016 ◽  
Vol 22 (5) ◽  
pp. 848-856 ◽  
Author(s):  
Behrokh Khoshnevis ◽  
Xiao Yuan ◽  
Behnam Zahiri ◽  
Jing Zhang ◽  
Bin Xia
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Simulation Model ◽  
Design Methodology ◽  
Construction Material ◽  
Construction Process ◽  
Element Analysis ◽  
Content Type ◽  
Contour Crafting ◽  
Finite Element Analysis Simulation

Purpose This paper aims to report on the experiments with the Contour Crafting Automated Construction process using sulfur concrete as the choice of construction material. Design/methodology/approach Several experiments have been performed at centimeter and meter scales. A finite element analysis simulation model for the behavior of sulfur concrete-based structures has been developed. Experimental results were compared with the results of simulation. Findings Sulfur concrete has numerous terrestrial applications and is potentially an ideal construction material for planetary construction. Originality/value Experimental samples of sulfur concrete were fabricated using a novel mixer/extrusion system. The mechanism was proven to be durable and stable after more than 500 h of work.

Effect of Orifice Shape in Contour Crafting with Ceramic Material: A Simulation for Extrusion and Deposition Mechanism

2007 ◽  
Vol 26-28 ◽  
pp. 953-956 ◽  
Author(s):  
Hong Kyu Kwon ◽  
Kwang Soo Kim
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Ceramic Material ◽  
Material Flow ◽  
External Surface ◽  
Surface Profile ◽  
Element Analysis ◽  
Deposition Mechanism ◽  
Contour Crafting ◽  
Optimal Fusion

This paper presents our experimentation and modeling efforts to study the pattern of material flow in the extrusion and deposition stages of the Contour Crafting (CC) process. Specifically, we performed a preliminary finite element analysis (FEA) of extrusion and deposition mechanisms with clay as the fabrication material. Using the FEA simulations, we derived certain basic understandings of the effect of extrusion orifice geometry on the performance of CC. We found that a square orifice is most aptly suited, both in terms of delivering the optimal fusion between layers as well as creating the desired external surface profile. Our experiments validate these results.

Cable-Suspended Robotic Contour Crafting System

2006 ◽  
Author(s):  
Paul Bosscher ◽  
Robert L. Williams ◽  
L. Sebastian Bryson ◽  
Daniel Castro-Lacouture
Keyword(s):  
Lower Cost ◽  
Size Structure ◽  
Concrete Structures ◽  
Maximum Size ◽  
The Novel ◽  
Fabrication Technology ◽  
Contour Crafting ◽  
Reachable Workspace ◽  
Computer Controlled ◽  
Construction System

This paper introduces a new concept for a contour crafting construction system. Contour crafting is a relatively new layered fabrication technology that enables automated construction of whole structures. The system proposed here consists of a mobile contour crafting platform driven by a translational cable-suspended robot. The platform includes an extrusion system for laying beads of concrete as well as computer-controlled trowels for forming the beads as they are laid. This system is fully automated and can be used to construct concrete structures rapidly and economically. The novel attributes of this system enable significant improvements over other proposed contour crafting systems, including easier portability, lower cost, and the potential to build much larger structures. This paper presents the kinematics and statics of the proposed system, and uses the reachable workspace of the robot as well as the corresponding cable tensions to approximate the maximum size structure that can be built using this manipulator.

Experimental investigation of contour crafting using ceramics materials

2001 ◽  
Vol 7 (1) ◽  
pp. 32-42 ◽  
Author(s):  
Behrokh Khoshnevis ◽  
Satish Bukkapatnam ◽  
Hongkyu Kwon ◽  
Jason Saito
Keyword(s):  
Experimental Investigation ◽  
Contour Crafting

Effects of orifice shape in contour crafting of ceramic materials

2002 ◽  
Vol 8 (3) ◽  
pp. 147-160 ◽  
Author(s):  
Hongkyu Kwon ◽  
Satish Bukkapatnam ◽  
Behrokh Khoshnevis ◽  
Jason Saito
Keyword(s):  
Ceramic Materials ◽  
Contour Crafting

3D Free Form Fabrication Using the Pivoting Side Trowel with Ceramic Material

2010 ◽  
Vol 658 ◽  
pp. 268-271 ◽  
Author(s):  
Hong Kyu Kwon ◽  
Moo Kyung Jang
Keyword(s):  
Ceramic Material ◽  
Computer Control ◽  
Fabrication Process ◽  
Free Form ◽  
Contour Crafting ◽  
Construction Automation ◽  
Initial Investigation ◽  
Superior Surface

This paper presents our concepts and initial investigation of a novel construction automation approach using a new layered fabrication process called Contour Crafting (CC). The process aims at automated construction of whole houses as well as sub-components. The potential of CC became evident from the initial investigations and experiments with various materials and geometries. Using this process, a single house or a colony of houses, each with possibly a different design, may be automatically constructed in a single run. CC uses computer control to take advantage of the superior surface forming capability of trowels to create large intricate structures with smooth and accurate surfaces.

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