A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
X-Ray Microcomputed Tomography for the Durability Characterization of Limestone Aggregate
The objective of this research was to use X-ray computed tomography CT) technology to investigate the influence of freezing and thawing on the internal structure and porosity of limestone aggregate used in transportation infrastructure components. Virgin and treated aggregate specimens were subjected to X-ray CT to obtain high-resolution three-dimensional (3-D) images. Aggregate treatments were conducted using the sodium sulfate soundness test (wetting/drying cycles) and cycles of the freeze-thaw test. The CT scans were carried out using sector 13-BMD synchrotron microtomography beamline at the Advanced Photon Source of the Argonne National Laboratory, Illinois. Analysis was conducted in which 3-D high-resolution images were constructed and used to quantify the pore space of the investigated aggregates before and after treatments. The X-ray CT technology was useful to visualize the internal structure of aggregate particles with high clarity, whereas visual inspection of the internal structure of aggregate particles provided information on pore space characteristics such as pore shape, connectivity, and distribution. In addition, quantities such as the volume of aggregate particles and the volume of pore space were measured and used to calculate the porosities of the investigated aggregates. Effects of the sodium sulfate soundness test on the treated aggregates (degradation, disintegration, and weathering) were significant as observed in the 3-D CT images of treated aggregate particles. Pore space volume increased with the increase in wetting/drying cycles of the aggregate particles and with the increase freeze/thaw cycles.
X-Ray Microcomputed Tomography for the Durability Characterization of Limestone Aggregate
The objective of this research was to use X-ray computed tomography CT) technology to investigate the influence of freezing and thawing on the internal structure and porosity of limestone aggregate used in transportation infrastructure components. Virgin and treated aggregate specimens were subjected to X-ray CT to obtain high-resolution three-dimensional (3-D) images. Aggregate treatments were conducted using the sodium sulfate soundness test (wetting/drying cycles) and cycles of the freeze-thaw test. The CT scans were carried out using sector 13-BMD synchrotron microtomography beamline at the Advanced Photon Source of the Argonne National Laboratory, Illinois. Analysis was conducted in which 3-D high-resolution images were constructed and used to quantify the pore space of the investigated aggregates before and after treatments. The X-ray CT technology was useful to visualize the internal structure of aggregate particles with high clarity, whereas visual inspection of the internal structure of aggregate particles provided information on pore space characteristics such as pore shape, connectivity, and distribution. In addition, quantities such as the volume of aggregate particles and the volume of pore space were measured and used to calculate the porosities of the investigated aggregates. Effects of the sodium sulfate soundness test on the treated aggregates (degradation, disintegration, and weathering) were significant as observed in the 3-D CT images of treated aggregate particles. Pore space volume increased with the increase in wetting/drying cycles of the aggregate particles and with the increase freeze/thaw cycles.
X-Ray Microcomputed Tomography for the Durability Characterization of Limestone Aggregate
Titi, Hani (author) / Druckrey, Andrew (author) / Alshibli, Khalid (author) / Tabatabai, Habib (author)
Geo-Congress 2014 ; 2014 ; Atlanta, Georgia
Geo-Congress 2014 Technical Papers ; 2877-2886
2014-02-24
Conference paper
Electronic Resource
English
X-Ray Micro-Computed Tomography for the Durability Characterization of Limestone Aggregate
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