Analysis of pore geometry in the compacted fine aggregate matrix by x-ray microtomography
DOI:
https://doi.org/10.15392/2319-0612.2022.1862Keywords:
X-ray microtomography, , fine aggregate matrix, poresAbstract
This study employs the advanced X-ray microtomography technique to evaluate the open and closed porosity geometry within fine aggregate matrix specimens extracted from different locations of SGC samples compacted with distinct densities. The adoption of advanced techniques such as the X-ray microtomography facilitate the fabrication of FAMs that are more representative of those that comprise asphalt concretes, as well as allow the use of similar replicates in mechanical tests. In addition, the traditional porosity assessment methods are well documented, but provide only global average results for the entire sample. In this context, X-ray microtomography stands out because, besides porosity information, pore distribution and a series of other parameters related to the internal structure of the object can be evaluated. This study evaluated the geometry of open and closed pores of FAM specimens extracted from different locations of SGC compacted samples. From the results and analyses, it can be concluded that the shape of the closed pores is spherical and the shape of the open pores is cylindrical for the SGC samples compressed with 2.26 g/cm3, 2.34 g/cm3 and 2.44 g/cm3.
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ARAGÃO, F. T. S.; VARGAS, G. A. B.; HARTMANN, D.A.; OLIVEIRA, A.D.; KIM, Y. R. Characterization of Temperature- and Rate-Dependent Fracture Properties of Fine Aggregate Bituminous Mixtures Using an Integrated Numerical-Experimental Approach. Engineering Fracture Mechanics, v. 180, p. 195 – 212, 2017. DOI: https://doi.org/10.1016/j.engfracmech.2017.05.036
KIM, Y. R. ; LITTLE, D. N. ; SONG, I. Effect of Mineral Fillers on Fatigue Resistance and Fundamental Material Characteristics: Mechanistic Evaluation. Transportation Research Record: Journal of the Transportation Research Board, v.1832, p. 1 – 8, 2003. DOI: https://doi.org/10.3141/1832-01
KLOBES, P.; MEYER, K.; MUNRO, R. G. Porosity and specific surface area measurements for solid materials. National Institute of Standards and Technology, Washington, 2006.
RICHERSON, D. W. Modern Ceramic Engineering: Properties, Processing and Use in De-sign, 3rd ed. Marcel Dekker, New York, 2006.
ROUQUEIROL J.; AVNIR D.; FAIRBRIDGE C. W.; EVERETT D. H.; HAYNES J. H.; PERNICONE N. ; RAMSAY J. D. F. ; SING K. S. W. ; UNGER K. K. Recommendations for the characterization of porous solids, Pure & Appl. Chern., v. 66, pp. 1739-1758, 1994. DOI: https://doi.org/10.1351/pac199466081739
SELLEY, R. C. ; SONNENBERG, S. A, 2015. Geology of petroleum, 3rd ed. Cambridge, MA Elsevier, 2015.
MENDES, J. C. Stratigraphy and sedimentology: structural geology and aerophotogeology. National Book Institute, Brasília, 1972.
RITTENHOUSE, G. A visual method of estimating two-dimensional sphericity. J Sedim Pet-rol., v. 13, p. 79-81, 1943.
ZOLLINGER, C. J. Application of Surface Energy Measurements to Evaluate Moisture Susceptibility of Asphalt and Aggregates. Master’s thesis. Texas A&M University, College Station, 2005.
ARAGÃO, F. T. S.; HARTMANN, D. A.; KIM, Y. R.; MOTTA, L. M. G.; HAFT-JAVAHERIAN, M. Numerical-Experimental Approach to Characterize Fracture Properties of Asphalt Mixtures at Low In-Service Temperatures. Transportation Research Record: Jour-nal of the Transportation Research Board, v. 2447, p. 42-50, 2014. DOI: https://doi.org/10.3141/2447-05
OSMARI, P. H.; COSTA, R. F.; ARAGÃO, F. T. S.; BRAZ, D.; BARROSO, R. C.; NOGUEIRA, L. P.; NG, A. K. Y. Determination of Volumetric Characteristics of FAM Mixtures using X-Ray Micro-Computed Tomography and Their Effects on the Rheological Behavior of the Material. Transportation Research Record: Journal of the Transportation Research Board, v. 2674, p. 97–107, 2020. DOI: https://doi.org/10.1177/0361198120914607
PESSOA, J. R. C.; DOMIGUEZ, J. S.; CARVALHO, G.; ASSIS, J. T. Concrete porosity determined by X-ray microtomography and image processing. ABPE, v. 14, p. 20-26, 2014.
GOPALAKRISHNAN, K.; CEYLAN, H.; INANC, F. Using X-ray computed tomography to study paving materials. Construction Materials, v. 160, p. 15-23, 2007. DOI: https://doi.org/10.1680/coma.2007.160.1.15
AMELIAN, S.; KIM, Y. R.; OSMARI, P. H.; ARAGÃO, F. T. S.; BRAZ, D. Development of a Volumetric Mix Design Approach for Fine Aggregate Matrix (FAM) and Validation with Micro-CT Method, In: TRANSPORTATION RESEARCH BOARD, 2019, Annals Washington, D. C., USA, p. 1-8.
CTAnalyser. The User’s Guide, Skyscan/Bruker micro-CT, Kartuizerweg 3B 2550 Kontich, Belgium, 2012.
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