Incorporating graphene oxide into lime solution: A study of flocculation and corresponding improvement

G. J. Jing; Z. M. Ye; X. L. Lu; J. M. Wu; S. X. Wang; X. Cheng

doi:10.3989/mc.2018.05217

Autores/as

G. J. Jing School of Materials Science & Engineering, University of Jinan https://orcid.org/0000-0002-5755-4341
Z. M. Ye School of Materials Science & Engineering, University of Jinan https://orcid.org/0000-0002-2638-9750
X. L. Lu School of Materials Science & Engineering, University of Jinan https://orcid.org/0000-0002-0953-9219
J. M. Wu School of Materials Science & Engineering, University of Jinan https://orcid.org/0000-0002-8005-0977
S. X. Wang School of Materials Science & Engineering, University of Jinan https://orcid.org/0000-0003-4995-7324
X. Cheng Shandong Provincial Key Laboratory of Preparation and Measurement of Building Materials https://orcid.org/0000-0002-6649-7959

DOI:

https://doi.org/10.3989/mc.2018.05217

Palabras clave:

Cemento Portland, Reacción, Cal, Dispersión, Superplastificantes

Resumen

La posible dispersión que el óxido de grafeno pueda inducir en matrices de cemento es un factor importante a considerar para mejorar el rendimiento del cemento. En este trabajo, se ha investigado la dispersión de óxido de grafeno en cemento simulando el ambiente alcalino con una solución del hidróxido de calcio, estudiando las estrategias correspondientes para mejorar el grado de dispersión. Los resultados obtenidos mostraron que el óxido de grafeno flocula incluso cuando la concentración de hidróxido de calcio es muy baja, lo que podría ser la razón principal de las características inestables del cemento dopado con óxido de grafeno. Además, se ha determinado que, en contraste con los grupos OH, los grupos COOH y las largas cadenas de los aditivos superplastificantes basados en policarboxilatos retrasan dicha floculación. Finalmente, se propone un mecanismo de dispersión de dichos aditivos superplastificantes basados en policarboxilatos. Este estudio proporciona una base para el diseño de materiales de cemento dopados con óxido de grafeno.

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