Consolidants Influence on Sandstone Capillarity. X‐ray CT Study

Rodríguez-Rey, A.; Argandoña, Vicente G. Ruiz de; Calleja, L.; Río, Luis Miguel Suárez del; Celorio, C.

doi:10.1002/9780470612187.ch40

Cited by 7 publications

(6 citation statements)

References 2 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…However, much more powerful X-rays provided by synchrotron radiation and microfocus X-ray systems have recently allowed moving a step forward in the analysed domain and going to micrometric scale, narrowing the gap between meso and microstructural techniques , Takahashi et al 2006. Recent applications of these mesostructural techniques in unsaturated soils have been devoted to the monitoring of hydro-chemo-mechanical processes (Comina et al 2008), to the detection of desiccation cracks (Gebrenegus et al 2006;Mukunoki et al 2006), to the visualisation of diffusion/hydration phenomena and to the study of fluid movements (Rolland et al 2003;Rolland et al 2005;Van Geet et al 2005;Rodríguez-Rey et al 2006;Carminati et al 2006;Koliji et al 2006a).…”

Section: Introductionmentioning

confidence: 97%

Microstructure Investigation in Unsaturated Soils: A Review with Special Attention to Contribution of Mercury Intrusion Porosimetry and Environmental Scanning Electron Microscopy

2008

View full text Add to dashboard Cite

With the advent of modern microstructural testing techniques and microstructure based constitutive models the microstructural characterisation of soils is gaining prominence. This paper reviews the history of microstructure investigation in unsaturated soils and discusses the engineering significance of this research to date. After a brief overview of the main microstructural techniques, the paper focuses on the evaluation of the current state of use and the development of two widely used techniques to study the microstructure of partially saturated soils, namely mercury intrusion porosimetry and the environmental scanning electron microscopy. The details of these techniques, their advantages and limitations, are first covered, followed by the presentation of selected test results. These results highlight the use of these techniques for understanding different hydro-mechanical behavioural features observed at macroscopic scale. Specifically, the paper shows the use of these techniques to explore the fundamental properties of water retention characteristics, water permeability, and micro and macrostructural interactions along different hydro-mechanical paths.

show abstract

Section: Introductionmentioning

confidence: 97%

Microstructure Investigation in Unsaturated Soils: A Review with Special Attention to Contribution of Mercury Intrusion Porosimetry and Environmental Scanning Electron Microscopy

2008

View full text Add to dashboard Cite

show abstract

“…The ability to visualize the water front affords both information on the textural unevenness in the stone, the ultimate cause of variations in capillarity, and a better understanding of the process itself. Some authors (15) have reported variations in sample capillarity before and after treatment with a consolidant.…”

Section: Materials Estudiadomentioning

confidence: 99%

“…Esta capacidad para visualizar el frente de agua en el interior de las muestras permite tener en cuenta las heterogeneidades texturales de la roca que provocan variaciones en la capilaridad y ofrece unos resultados más completos. Algunos autores (15) estudian la variación que experimenta la capilaridad en muestras tratadas y no tratadas con un consolidante.…”

Section: Introductionunclassified

Ensayo de capilaridad en areniscas monitorizado mediante tomografía computerizada de rayos X. Estudio comparativo con métodos convencionales

Argandoña¹,

Rodríguez-Rey²,

Calleja³

et al. 2008

Mater. construcc.

Self Cite

View full text Add to dashboard Cite

Ensayo de capilaridad en areniscas monitorizado mediante tomografía computerizada de rayos X. Estudio comparativo con métodos convencionales Capillarity test monitored by X-ray computer tomography in sandstones.A comparative study with standard methods RESUMENLa Tomografía Axial Computerizada de rayos X (TAC) ha sido aplicada al estudio del movimiento del agua en el interior de las rocas (usando como modelo la arenisca de La Marina, roca utilizada en la construcción de algunos monumentos históricos en Asturias -N de España-). Durante los ensayos de capilaridad se han registrado las imágenes de rayos X de la penetración del agua en el interior de la roca que suministran información no aportada por los métodos habituales. La reconstrucción tridimensional muestra la posición del frente de agua a lo largo del tiempo y su relación con las características petrográficas de la roca. La cuantificación del porcentaje en volumen de roca embebida en agua es una medida más real de la capilaridad de la misma. Los resultados así obtenidos han sido comparados con los de la capilaridad medida por el método descrito en la norma UNE-EN 1925 Palabras clave: rayos X, tomografía, capilaridad, rocas, arenisca. INTRODUCCIÓNMuchos de los fenómenos de alteración que afectan a los materiales rocosos utilizados en la construcción de edifi- SUMMARYThe X-ray Computed Tomography technique (X-ray CT) has been applied to the study of the movement of water inside rocks (using La Marina sandstone, that has been used as dimension stone in some historical monuments of Asturias-N of Spain-). The water penetration inside the rock has been imaged under CT during capillarity tests; these images provides new information not available by the standard methods. 3-D images show the water front position versus time during the test and its relation with the rock petrographic characteristics. The quantification of the soaked rock volume percentage provides a more real estimation of capillarity. The results have been compared with those obtained by applying the method described in the UNE-EN 1925:1999 standard.

show abstract

“…These studies presented superficial 2D images of treated samples only as an illustration of the distribution of the water repellent in the rock. SEM-EDX and X-ray microcomputed tomography, combined with specific 3D software, had been employed to determine the impregnation depth and distribution of consolidants and water repellents in several constructive materials (Cnudde et al, 2004;De Vetter et al, 2006;Mees et al, 2003;Rodríguez-Rey et al, 2006;Ruiz de Argandoñ a et al, 2003). Nevertheless, this arrangement of techniques is not easily available and is presently limited to detecting pores larger than 10 lm.…”

Section: Introductionmentioning

confidence: 99%

Laser scanning confocal microscopy characterization of water repellent distribution in a sandstone pore network

Zoghlami

Gómez‐Gras

Corbella

et al. 2008

Microscopy Res & Technique

View full text Add to dashboard Cite

In the present work, we propose the use of the Laser Scanning Confocal Microscopy (LSCM) to determine the effect of water repellents on rock's pore-network configuration and interconnection. The rocks studied are sandstones of Miocene age, a building material that is commonly found in the architectural heritage of Tunisia. The porosity quantitative data of treated and untreated samples, obtained by mercury porosimetry tests, were compared. The results show a slight decrease in total porosity with the water repellent treatment, which reduced both microporosity and macroporosity. This reduction produced a modification in pore size distribution and a shift of the pore access size mode interval toward smaller pore diameters (from the 30-40 microm to the 20-30 microm intervals). The water repellent was observed in SEM images as a continuous film coating grain surfaces; moreover, it was easily visualized in LSCM, by staining the water repellent with Epodye fluorochrome, and the coating thickness was straightforwardly measured (1.5-2 microm). In fact, the combination of mercury intrusion porosimetry data and LSCM observations suggests that the porosity reduction and the shift of the pore diameter mode were mainly due to the general reduction of pore diameters, but also to the plugging of the smallest pores (less than 3-4 microm in diameter) by the water repellent film. Finally, the LSCM technique enabled the reconstruction of 3D views of the water repellent coating film in the pore network, indicating that its distribution was uniform and continuous over the 100 microm thick sample. The LSCM imaging facilitates the integration and interpretation of mercury porosimetry and SEM data.

show abstract

Consolidants Influence on Sandstone Capillarity. X‐ray CT Study

Cited by 7 publications

References 2 publications

Microstructure Investigation in Unsaturated Soils: A Review with Special Attention to Contribution of Mercury Intrusion Porosimetry and Environmental Scanning Electron Microscopy

Microstructure Investigation in Unsaturated Soils: A Review with Special Attention to Contribution of Mercury Intrusion Porosimetry and Environmental Scanning Electron Microscopy

Ensayo de capilaridad en areniscas monitorizado mediante tomografía computerizada de rayos X. Estudio comparativo con métodos convencionales

Laser scanning confocal microscopy characterization of water repellent distribution in a sandstone pore network

Contact Info

Product

Resources

About