Bibliographic citations
Hurtado, G., (2024). Diseño, fabricación y validación de un mortero geopolimérico a base de catalizador gastado de craqueo catalítico FCC para aplicaciones de manufactura aditiva [Pontificia Universidad Católica del Perú]. http://hdl.handle.net/20.500.12404/29315
Hurtado, G., Diseño, fabricación y validación de un mortero geopolimérico a base de catalizador gastado de craqueo catalítico FCC para aplicaciones de manufactura aditiva []. PE: Pontificia Universidad Católica del Perú; 2024. http://hdl.handle.net/20.500.12404/29315
@misc{renati/1658769,
title = "Diseño, fabricación y validación de un mortero geopolimérico a base de catalizador gastado de craqueo catalítico FCC para aplicaciones de manufactura aditiva",
author = "Hurtado Durand, Gianmarco Andre",
publisher = "Pontificia Universidad Católica del Perú",
year = "2024"
}
3D printing is an emerging technology that is revolutionizing the construction industry. A large number of 3D printed construction projects use Portland cement-based concrete as their main material. However, cement production is highly polluting, contributing about 75% of the construction industry's greenhouse gases. Therefore, some researchers have used geopolymers as an alternative hydraulic binder to Portland cement. However, the production of geopolymers generally requires alkaline dissolution, which has a high cost and significant environmental impact. Considering this scenario, this thesis proposes to use a waste from the brewing industry called diatomaceous earth as an alternative alkaline activator. When mixed with spent catalytic cracking catalyst (FCC) powder, it will allow the production of a geopolymeric mortar compatible with additive manufacturing technology. An experimental plan was carried out covering (i) the processing and characterization of the materials (ii) the evaluation of fresh state properties of geopolymer mortar (flowability, workability, extrudability and buildability) (iii) the validation of the mix design and (iv) the evaluation of the compressive strength of the geopolymer mortar. It was determined that the FCC powder should go through a 6-hour grinding process to reach an average particle size of 17 μm and thus improve its reaction with the alkaline solution. The design of mixtures was carried out by means of extrusion tests with a pastry bag, where the good workability of the mixtures was observed. Continuous filaments were obtained without geometric deformations, which are one of the main characteristics of 3D printing. By printing 3D elements, the printable dosage was validated with a NaOH molarity in the alkaline solution of 7, an alkaline solution/raw material ratio of 1.04 and a fine aggregate/raw material ratio of 2.91, which complies with the expected characteristics. Also, the compressive strength of all the mixtures was evaluated, where at the printable dosage it had an average strength of 10 MPa. This thesis opens a new line of research on the use of industrial wastes for the manufacture of geopolymers that meet the requirements for their application in additive manufacturing and provide an alternative with low environmental impact.
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