Book chapter
Comprehensive Investigation into the Influence of Soil Composition and Water Content on Cracking Due to Drying Shrinkage in 3D-Printed Earthen Structures
Second RILEM International Conference on Earthen Construction, v 52, pp 22-31
27 Jun 2024
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Abstract
As a raw material for additive construction, earth offers a multitude of benefits, from environmental and economic to social points of view. However, the fresh-state properties of printable materials and the curing conditions of additively manufactured elements make large-scale 3D-printed earthen structures susceptible to suffering severe cracking from shrinkage during drying. This project investigates the effect of soil composition and water content on the development of drying shrinkage cracking in 3D-printed earthen structures. This article presents two strategies for minimizing those cracks: decreasing the clay content of the soil by adding fine sand and decreasing the required water content for printability by using a clay dispersant agent. Earth-based mix designs with different soil/fine-sand ratios and sodium hexametaphosphate (SHMP) contents were subjected to flow table, rotational rheology, and shrinkage cracking tests. The results indicate that the clay and water content are determining factors that minimize the appearance of cracks due to drying shrinkage. Two earthen-based formulations with zero cracks due to shrinkage resulted from replacing 50% wt. of the soil with fine sand and the addition of 0.55 and 2.20% wt. of SHMP. Further research is needed to confirm the validity of these findings across diverse soil types and curing conditions.
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Details
- Title
- Comprehensive Investigation into the Influence of Soil Composition and Water Content on Cracking Due to Drying Shrinkage in 3D-Printed Earthen Structures
- Creators
- Betty GonzalesDiana ZavaletaBruno BertolottiRafael AguilarMiguel PandoJavier NakamatsuSuyeon KimGuido Silva
- Publication Details
- Second RILEM International Conference on Earthen Construction, v 52, pp 22-31
- Series
- RILEM Bookseries
- Publisher
- Springer Nature Switzerland; Cham
- Number of pages
- 10
- Grant note
- CONCYTEC: 178-2020-FONDECYT PUCP: FAI-018-23
This work was supported by CONCYTEC under the project: "WasiTek - Desarrollo de un sistema de construccion robotico autonomo para reconstruccion de viviendas post-desastre utilizando materiales locales mejorados con polimeros naturales extraidos de residuos industriales" (Contract No 178-2020-FONDECYT). Additional funds were provided by PUCP (FAI-018-23).
- Resource Type
- Book chapter
- Language
- English
- Academic Unit
- Civil, Architectural, and Environmental Engineering
- Web of Science ID
- WOS:001290430600003
- Scopus ID
- 2-s2.0-85200481990
- Other Identifier
- 991021892112404721
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- Collaboration types
- Domestic collaboration
- International collaboration
- Web of Science research areas
- Construction & Building Technology
- Green & Sustainable Science & Technology
- Materials Science, Characterization & Testing