STUDY OF 3D PRINTING PERFORMANCES OF CEMENTLESS COLLOIDAL MATERIALS

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21110%2F24%3A00377682" target="_blank" >RIV/68407700:21110/24:00377682 - isvavai.cz</a>

Result on the web

<a href="https://doi.org/10.18552/2024/SCMT/208" target="_blank" >https://doi.org/10.18552/2024/SCMT/208</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.18552/2024/SCMT/208" target="_blank" >10.18552/2024/SCMT/208</a>

Result language

angličtina

Original language name

STUDY OF 3D PRINTING PERFORMANCES OF CEMENTLESS COLLOIDAL MATERIALS

Original language description

To achieve the goal of construction automation, the application of 3D printing technology in construction is a significant development trend in the future. 3D printing has the advantages of high precision, high speed, low cost, and environmental protection. It can help reduce construction costs and reduce time and energy. In addition, it can also be used to construct complex shapes that would otherwise be difficult to achieve. To achieve the goal of a circular economy, this study utilized different types of industrial by-products (co-fired fly ash, ultra-fine fly ash, fly ash and ground granulated blast-furnace slag) to produce ternary cementless colloidal without alkali activators. It was also used as a low-carbon alternative to traditional cement. Furthermore, the use of by-products reduced the environmental impact of production. This study used a paste-type 3D printer with model number UM 2205. Set time, fluidity, mini-slump and compressive strength were used to verify the constructability of the 3D-printed specimens. The test results showed that 3D-printed paste specimens mixed with 60% slag, 30% co-fired fly ash and 10% fly ash had the highest compressive strength. The 28-day compressive strength reached 25 MPa and was better than steel-molded specimens. The remaining ternary cementless printed specimens achieved a compressive strength of 15-20 MPa. However, the strength of the printed specimens was lower than that of the steel molded specimens. The cementitious properties of cementless colloidal materials were analyzed by scanning electron microscope observations and XRD tests. In the microstructures of these printed specimens, needle-like hydration reactions were clearly visible, which were hydrations such as C-A-S-H or ettringite, which also provided cementless materials with strength. The gaps between the printed layers were complete and the cross-section was filled without large air bubbles as observed by an optical microscope. The hydration products created a dense microstructure within the printed specimens, increasing strength and permeability. The study showed that 3D printing effectively made cementless materials with improved strength and durability.

Czech name

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Czech description

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Type

D - Article in proceedings

CEP classification

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OECD FORD branch

20501 - Materials engineering

Project

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Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2024

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Article name in the collection

SIXTH INTERNATIONAL CONFERENCE ON SUSTAINABLE CONSTRUCTION MATERIALS AND TECHNOLOGIES (SCMT6): Vol 1 (SCMT Conferences)

ISBN

9798332048715

ISSN

2515-3048

e-ISSN

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Number of pages

10

Pages from-to

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Publisher name

Coventry University

Place of publication

Coventry

Event location

Lyon

Event date

Jun 9, 2024

Type of event by nationality

WRD - Celosvětová akce

UT code for WoS article

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