Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/77866
Title: Structural rebuilding of concrete materials in 3D printing with various types of additives
Authors: Li, Ziyang
Keywords: DRNTU::Engineering::Aeronautical engineering::Materials of construction
Issue Date: 2019
Abstract: Traditional constructing method can be time-consuming. Limits also exist in traditional construction method. Concrete 3D printing is a kind of novel in-situ construction method which eliminate the use of form works. With the help of robots, construction can be flexible in 3D space. Manpower and time can be effectively saved. As precondition of successfully applying the concrete 3D printing, some rheology property (yield stress, viscosity, thixotropy) of the concrete paste must be satisfied because there is no formwork. Inter layer bonding property is one of the weakness of 3D printed concrete structures. This paper investigates different additives (retarder, reducer, superplasticizer and accelerator) which may help obtain required properties for successful 3D printing. The hydration, thixotropy and side effect are also considered and the hydration process and rheology changing in the time domain are combined to analyze the structural building process. A molecular absorb model is used to explain the micro-scale mechanism. At last, mechanical property of the printed filaments is used to estimate the result.
URI: http://hdl.handle.net/10356/77866
Fulltext Permission: restricted
Fulltext Availability: With Fulltext
Appears in Collections:MAE Student Reports (FYP/IA/PA/PI)

Files in This Item:
File Description SizeFormat 
Structural rebuilding of concrete materials in 3D printing with various types of additives.pdf
  Restricted Access
3.17 MBAdobe PDFView/Open

Page view(s)

104
Updated on Jun 19, 2021

Download(s) 50

20
Updated on Jun 19, 2021

Google ScholarTM

Check

Items in DR-NTU are protected by copyright, with all rights reserved, unless otherwise indicated.