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A platform for research: civil engineering, architecture and urbanism
Developing Binders with Ceramic Waste for 3DCP Mixes
https://orcid.org/0000-0002-3695-1356
https://orcid.org/0000-0003-2561-5231
https://orcid.org/0009-0002-7363-4744
https://orcid.org/0000-0003-1178-4341
https://orcid.org/0000-0003-1914-4541
Reducing the clinker consumption in concrete is among the most urgent tasks of the construction industry. This is especially important in the 3D concrete printing (3DCP) context, where high binder contents are often required. In this work, we produced Portland-based binders containing ceramic waste (CW) for 3DCP application. For this purpose, Portland cement was replaced with 20 and 40 wt% CW. The fresh performance of the 3DCP mixes was evaluated through the buildability test, rotational rheometry (vane test), and the slug test. In addition, hydration was followed up to 7 days through isothermal calorimetry, besides 3- and 7-day compressive strength tests. The results showed that replacing cement with 20 and 40 wt% CW increased the yield stress of concrete by 4.5 and 9.3 times, respectively; the lower replacement level was beneficial for buildability, increasing the maximum supported layers from 12 to 30, while the higher content impaired pumpability. The compressive strength of 3DCP decreased by 12% at 3 days of hydration for both replacement levels, while the sample containing 20% CW matched the strength of the reference mix at 7 days. This can be justified by the filler effect coupled with the pozzolanic activity of the residue confirmed by calorimetry. Overall, we found replacing 20% cement with CW was a feasible strategy for reducing the binder content in 3DCP mixes while improving buildability.
Developing Binders with Ceramic Waste for 3DCP Mixes
https://orcid.org/0000-0002-3695-1356
https://orcid.org/0000-0003-2561-5231
https://orcid.org/0009-0002-7363-4744
https://orcid.org/0000-0003-1178-4341
https://orcid.org/0000-0003-1914-4541
Reducing the clinker consumption in concrete is among the most urgent tasks of the construction industry. This is especially important in the 3D concrete printing (3DCP) context, where high binder contents are often required. In this work, we produced Portland-based binders containing ceramic waste (CW) for 3DCP application. For this purpose, Portland cement was replaced with 20 and 40 wt% CW. The fresh performance of the 3DCP mixes was evaluated through the buildability test, rotational rheometry (vane test), and the slug test. In addition, hydration was followed up to 7 days through isothermal calorimetry, besides 3- and 7-day compressive strength tests. The results showed that replacing cement with 20 and 40 wt% CW increased the yield stress of concrete by 4.5 and 9.3 times, respectively; the lower replacement level was beneficial for buildability, increasing the maximum supported layers from 12 to 30, while the higher content impaired pumpability. The compressive strength of 3DCP decreased by 12% at 3 days of hydration for both replacement levels, while the sample containing 20% CW matched the strength of the reference mix at 7 days. This can be justified by the filler effect coupled with the pozzolanic activity of the residue confirmed by calorimetry. Overall, we found replacing 20% cement with CW was a feasible strategy for reducing the binder content in 3DCP mixes while improving buildability.
Developing Binders with Ceramic Waste for 3DCP Mixes
https://orcid.org/0000-0002-3695-1356
https://orcid.org/0000-0003-2561-5231
https://orcid.org/0009-0002-7363-4744
https://orcid.org/0000-0003-1178-4341
https://orcid.org/0000-0003-1914-4541
Reducing the clinker consumption in concrete is among the most urgent tasks of the construction industry. This is especially important in the 3D concrete printing (3DCP) context, where high binder contents are often required. In this work, we produced Portland-based binders containing ceramic waste (CW) for 3DCP application. For this purpose, Portland cement was replaced with 20 and 40 wt% CW. The fresh performance of the 3DCP mixes was evaluated through the buildability test, rotational rheometry (vane test), and the slug test. In addition, hydration was followed up to 7 days through isothermal calorimetry, besides 3- and 7-day compressive strength tests. The results showed that replacing cement with 20 and 40 wt% CW increased the yield stress of concrete by 4.5 and 9.3 times, respectively; the lower replacement level was beneficial for buildability, increasing the maximum supported layers from 12 to 30, while the higher content impaired pumpability. The compressive strength of 3DCP decreased by 12% at 3 days of hydration for both replacement levels, while the sample containing 20% CW matched the strength of the reference mix at 7 days. This can be justified by the filler effect coupled with the pozzolanic activity of the residue confirmed by calorimetry. Overall, we found replacing 20% cement with CW was a feasible strategy for reducing the binder content in 3DCP mixes while improving buildability.
Developing Binders with Ceramic Waste for 3DCP Mixes
de Matos, Paulo (author) / Schackow, Adilson (author) / Safanelli, Nicollas (author) / Zat, Tuani (author) / Rodríguez, Erich (author) / Universitätsbibliothek Braunschweig (host institution)
2024
Digital Concrete 2024 - Supplementary Proceedings
Miscellaneous
Electronic Resource
English
rheology , 3D printing , ceramic waste , 3DCP
DDC:
62
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