Pore structure degradation of different cement mortars exposed to sulphuric acid
Acid attack causes the deterioration of construction material surfaces. The objective of this study was to investigate the degradation of different types of cement mortar in terms of variations in pore size distribution obtained by mercury intrusion porosimetry (MIP), mass loss, and compressive stre...
| Autores: | , , , |
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| Tipo de recurso: | artículo |
| Fecha de publicación: | 2019 |
| País: | España |
| Institución: | Consejo General de la Arquitectura Técnica de España (CGATE) |
| Repositorio: | RIARTE |
| OAI Identifier: | oai:www.riarte.es:20.500.12251/1582 |
| Acceso en línea: | http://hdl.handle.net/20.500.12251/1582 https://doi.org/10.3390/app9245297 |
| Access Level: | acceso abierto |
| Palabra clave: | Lluvia ácida Durabilidad Nanomateriales Material de construcción Morteros - Construcción Degradación Revestimientos - Construcción Ensayos (propiedades o materiales) 3313.04 Material de Construcción 3312.09 Resistencia de Materiales 3312.12 Ensayo de Materiales 3312.02 Aglomerantes |
| Sumario: | Acid attack causes the deterioration of construction material surfaces. The objective of this study was to investigate the degradation of different types of cement mortar in terms of variations in pore size distribution obtained by mercury intrusion porosimetry (MIP), mass loss, and compressive strength. The mortars were manufactured with nanosilica, zinc stearate, and an ethyl silicate coating. After curing (28 days), the samples were subjected to acid exposure for 90 days, immersed ina solution (3% w/w) of sulphuric acid (H2SO4). The results indicate that the mortars showed a more refined microstructure, with a higher proportion of smaller pores (<100 nm) compared to the control mortar. The 28-day and 90-day compressive strength variations of mortars were also determined by observing pronounced reduction due to the appearance of expansive compounds responsible for microcracking. © 2019 by the authors. |
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