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Engineering Lightweight 3D Printable Concrete with Upcycled Bio-Origin Aggregates /

Record Type:	Electronic resources : Monograph/item
Title/Author:	Engineering Lightweight 3D Printable Concrete with Upcycled Bio-Origin Aggregates // Hanbin Cheng.
Author:	Cheng, Hanbin,
Description:	1 electronic resource (190 pages)
Notes:	Source: Dissertations Abstracts International, Volume: 87-04, Section: B.
Contained By:	Dissertations Abstracts International87-04B.
Subject:	Design. -
Online resource:	https://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=32289540
ISBN:	9798297670358

Engineering Lightweight 3D Printable Concrete with Upcycled Bio-Origin Aggregates /
Cheng, Hanbin,

Engineering Lightweight 3D Printable Concrete with Upcycled Bio-Origin Aggregates /Hanbin Cheng. - 1 electronic resource (190 pages)

Source: Dissertations Abstracts International, Volume: 87-04, Section: B.

The construction industry has witnessed significant advancements with the integration of additive manufacturing, particularly 3D printing, which offers enhanced design flexibility, reduced material waste, and faster construction. Lightweight concrete, known for its low density and improved thermal insulation, has emerged as a promising material for 3D printing due to its ease of extrusion and structural efficiency. By combining 3D printing technology with lightweight concrete, researchers aim to optimize building performance, reduce structural loads, and enable complex geometric designs that traditional methods cannot achieve. This innovation aligns with sustainable construction practices by minimizing material usage and labor costs while expanding architectural possibilities. The development of 3D printed lightweight concrete represents a transformative step toward efficient, eco-friendly, and high-performance construction solutions. To further advance sustainability, recent research has explored the incorporation of recycled materials. In this study, cork granules from discarded stoppers, as a lightweight aggregate in 3D printable concrete. Cork, a natural and renewable resource, offers excellent thermal insulation, sound absorption, and vibration damping while reducing the overall weight of the concrete mixture. By integrating recycled cork granules into 3D printed concrete, this approach not only promotes circular economy principles by repurposing waste but also enhances the material's environmental performance. The development of cork-based lightweight 3D printable concrete represents a promising step toward eco-friendly, energy-efficient, and architecturally versatile construction solutions.While the integration of recycled cork granules into 3D printable concrete presents a sustainable solution for lightweight, thermally efficient construction, several key challenges hinder its wider application: (1) the lack of robust predictive tools for print geometry and structural behavior; (2) the lack of feasible 3D printable mixture design preparation method; (3) the lack of knowledge on the comprehensive performance of cork concrete. Regarding these issues, this study was carried out from the following perspectives:(1) Proposing a novel numerical simulation to predict the geometry of 3D printed concrete and optimize the printing strategy . In this part, the reproducing kernel particle method (RKPM) was introduced, coupled with a Bingham model calibrated via rheometer tests. Slump tests at different resting times captured the material's time-dependent behavior. Parametric studies on single-layer prints (varying speeds/nozzle heights) and multi-layer cases validated RKPM's accuracy in predicting deformations. Simulations matched experimental slump measurements, confirming RKPM's ability to model time-dependent concrete flow. The verified method precisely predicted single- and multi-layer geometries, demonstrating its broad applicability for printing strategy optimization.(2) Proposing a feasible 3D printable lightweight concrete mixture preparation method: This study overcame key barriers to 3D-printed lightweight concrete (3DPLC) adoption by developing a novel mixture design method using granulated cork from stoppers. We established a linear relationship between cement paste expansion and cork content, enabling precise printability control. The modified excess paste theory incorporates a water loss factor to account for cork's unique absorption behavior in fresh concrete. Rheological analysis reveals how cork alters paste properties, allowing dynamic yield stress optimization for extrusion and shape retention. Our validated framework provides a universal approach for porous aggregates in 3D printing, merging sustainability with structural performance while advancing construction decarbonization.(3) Comprehensive performance investigations on the 3D printable concrete using cork granules. This study explored recycled cork aggregates in 3D-printable lightweight concrete, replacing river sand (25-100% by volume). Comprehensive investigations including density, flowability, rheological performances, mechanical properties, micro-scale structures, thermal performance and sustainability assessment. Besides, a case study of single layer house was analyzed through the building energy efficiency and CO2 emissions by using the developed 3D cork-lightweight concrete.Addressing these challenges requires multidisciplinary research to develop predictive models for printability, establish optimized mix designs, and evaluate the comprehensive performance of cork-reinforced 3D printed concrete. Overcoming these barriers could unlock the full potential of this sustainable material in modern construction.

English

ISBN: 9798297670358Subjects--Topical Terms:

518875
Design.

Engineering Lightweight 3D Printable Concrete with Upcycled Bio-Origin Aggregates /
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520 $a The construction industry has witnessed significant advancements with the integration of additive manufacturing, particularly 3D printing, which offers enhanced design flexibility, reduced material waste, and faster construction. Lightweight concrete, known for its low density and improved thermal insulation, has emerged as a promising material for 3D printing due to its ease of extrusion and structural efficiency. By combining 3D printing technology with lightweight concrete, researchers aim to optimize building performance, reduce structural loads, and enable complex geometric designs that traditional methods cannot achieve. This innovation aligns with sustainable construction practices by minimizing material usage and labor costs while expanding architectural possibilities. The development of 3D printed lightweight concrete represents a transformative step toward efficient, eco-friendly, and high-performance construction solutions. To further advance sustainability, recent research has explored the incorporation of recycled materials. In this study, cork granules from discarded stoppers, as a lightweight aggregate in 3D printable concrete. Cork, a natural and renewable resource, offers excellent thermal insulation, sound absorption, and vibration damping while reducing the overall weight of the concrete mixture. By integrating recycled cork granules into 3D printed concrete, this approach not only promotes circular economy principles by repurposing waste but also enhances the material's environmental performance. The development of cork-based lightweight 3D printable concrete represents a promising step toward eco-friendly, energy-efficient, and architecturally versatile construction solutions.While the integration of recycled cork granules into 3D printable concrete presents a sustainable solution for lightweight, thermally efficient construction, several key challenges hinder its wider application: (1) the lack of robust predictive tools for print geometry and structural behavior; (2) the lack of feasible 3D printable mixture design preparation method; (3) the lack of knowledge on the comprehensive performance of cork concrete. Regarding these issues, this study was carried out from the following perspectives:(1) Proposing a novel numerical simulation to predict the geometry of 3D printed concrete and optimize the printing strategy . In this part, the reproducing kernel particle method (RKPM) was introduced, coupled with a Bingham model calibrated via rheometer tests. Slump tests at different resting times captured the material's time-dependent behavior. Parametric studies on single-layer prints (varying speeds/nozzle heights) and multi-layer cases validated RKPM's accuracy in predicting deformations. Simulations matched experimental slump measurements, confirming RKPM's ability to model time-dependent concrete flow. The verified method precisely predicted single- and multi-layer geometries, demonstrating its broad applicability for printing strategy optimization.(2) Proposing a feasible 3D printable lightweight concrete mixture preparation method: This study overcame key barriers to 3D-printed lightweight concrete (3DPLC) adoption by developing a novel mixture design method using granulated cork from stoppers. We established a linear relationship between cement paste expansion and cork content, enabling precise printability control. The modified excess paste theory incorporates a water loss factor to account for cork's unique absorption behavior in fresh concrete. Rheological analysis reveals how cork alters paste properties, allowing dynamic yield stress optimization for extrusion and shape retention. Our validated framework provides a universal approach for porous aggregates in 3D printing, merging sustainability with structural performance while advancing construction decarbonization.(3) Comprehensive performance investigations on the 3D printable concrete using cork granules. This study explored recycled cork aggregates in 3D-printable lightweight concrete, replacing river sand (25-100% by volume). Comprehensive investigations including density, flowability, rheological performances, mechanical properties, micro-scale structures, thermal performance and sustainability assessment. Besides, a case study of single layer house was analyzed through the building energy efficiency and CO2 emissions by using the developed 3D cork-lightweight concrete.Addressing these challenges requires multidisciplinary research to develop predictive models for printability, establish optimized mix designs, and evaluate the comprehensive performance of cork-reinforced 3D printed concrete. Overcoming these barriers could unlock the full potential of this sustainable material in modern construction.
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