Performance of rubber mortars containing silica coated rubber

J.  Li; P.  Chen; H.  Cai; Y.  Xu; X.  Tian; C.  Li; L.  Cui

doi:10.3989/mc.2021.11620

Autores/as

J. Li School of Civil Engineering and Architecture, Anhui University of Science and Technology https://orcid.org/0000-0001-9914-5944
P. Chen School of Civil Engineering and Architecture, Anhui University of Science and Technology - Jitoo UHPC (Shandong) New Material Technology Co., Ltd, Shandong Academician Workstation of Ghani Razaqpur https://orcid.org/0000-0002-5538-617X
H. Cai School of Civil Engineering and Architecture, Anhui University of Science and Technology https://orcid.org/0000-0002-6931-3027
Y. Xu School of Civil Engineering and Architecture, Anhui University of Science and Technology https://orcid.org/0000-0001-8438-3130
X. Tian School of Civil Engineering and Architecture, Anhui University of Science and Technology https://orcid.org/0000-0002-1398-6476
C. Li Jitoo UHPC (Shandong) New Material Technology Co., Ltd, Shandong Academician Workstation of Ghani Razaqpur https://orcid.org/0000-0002-3572-1452
L. Cui School of Civil Engineering and Architecture, Anhui University of Science and Technology https://orcid.org/0000-0002-1508-4636

DOI:

https://doi.org/10.3989/mc.2021.11620

Palabras clave:

Mortero, Tratamiento de residuos, Propiedades mecánicas, Caracterización, Microestructura

Resumen

Este trabajo investiga la influencia del caucho recubierto de sílice en el rendimiento de los morteros de caucho. Se aplica un método clásico de Stöber sol-gel para producir una capa de revestimiento de sílice sobre las partículas de caucho, que se utiliza para reemplazar parcialmente los áridos finos en el hormigón. Se examinan los efectos de las partículas de caucho modificadas en la superficie sobre la fluidez, la resistencia mecánica, la tasa de absorción de agua por capilaridad y la microestructura de los morteros. Los resultados muestran que el revestimiento de sílice de las partículas de caucho reduce el ángulo de contacto entre las partículas de caucho de 120° a 103° (es decir, en 17°) y cambia las propiedades hidrofóbicas de hidrofobia fuerte a hidrofobia débil. Las resistencias mecánicas de los morteros mejoran significativamente con la incorporación de partículas de caucho modificadas en la superficie, del 41,60% al 44,86% (resistencia a la compresión) y del 7,80% al 26,28% (resistencia a la flexión). Además, la incorporación de partículas de caucho modificadas en la superficie aumenta la densidad de la microestructura del mortero y mejora las interfases con las pastas que lo rodean.

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