Micro computed tomography analysis and mineralogical identification of construction samples affected by haloclasty

In this thesis, the porosity of 30 samples of different materials, classified as: lava rocks, clay bricks, cobblestones and concrete; is studied. All samples were taken from the city of Ibarra, Ecuador, especially from places that exhibited drastic changes in coloration in the same material. The extraction of core samples considered the exposed surface and a certain depth that varied depending on the source. With the use of micro computerized tomography, samples were reconstructed digitally and processed to obtain information on size, shape, distribution and location of pores in each sample. This method proved very reliable for determination of macropores and mesopores but did not have enough resolution for microporosity. Results showed that concrete and cobblestone samples mostly had the largest pores. Due to the resolution limit, clay brick samples seemed to have the least amount of pores, yet under closer analysis, these samples presented pores even smaller than 5 μm. It was confirmed that the method of computed microtomography is more reliable for concrete samples. Additionally, it was possible to relate the shape of pores with their size and position along the sample. In conclusion, it was determined that surface pores were formed due to haloclasty, but the effect is severe due to the climatic characteristics of the zone.

• Príomhchruthaitheoir: Ruiz Castillo, Ana Gabriela (author)
• Formáid: bachelorThesis
• Teanga: eng
• Foilsithe / Cruthaithe: 2023
• Ábhair: Haloclastia; Meteorización por sales; Materiales de construcción; Haloclasty; Salt weathering; Construction materials
• Rochtain ar líne: http://repositorio.yachaytech.edu.ec/handle/123456789/665