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Scientific Papers

Vol. 11 No. 22 (2009): Journal 22

Evaluation of the Physical and Chemical Characteristics of Limestone Mineral Fillers and Stone Dust in the Formulation of Asphalt Mortars

DOI:
https://doi.org/10.15517/g85vd324
Submitted
October 24, 2025
Published
2025-10-24

Abstract

The objective of this project is to emphasize the importance of studying fill materials of different mineral origins, which are used in the formulation of bituminous mixtures, specifically of mastics. Even after several different approaches in scientific circles, this context is still under discussion among researchers, mainly regarding the physical and chemical effects involved, which have a great influence in the mechanical performance of the mastics, and consequently of the asphaltic mixtures. This research was developed from the use of mineral fill materials that come from lime rock (lime powder) and granite rock (rock powder) of the mineral deposits in the Pará state, as well as the samples of asphaltic cement (CAP) 50/70 that come from the refinery LUBNOR, located in Fortaleza (Ceará). Several aspects were evaluated, including: semi-quantitative chemical fluorescence x-ray analysis, low angle laser ray emission grading, scanning electron microscopy, high resolution image capture. ring and ball softening point, and aggregate-asphalt and aggregate mastic penetration and adhesivity. Even considering that the tests regarding mastic analysis were empirical, the results obtained on the whole indicated convergent trends. This means that the activity component exerted by a mineral fill material in the formation of a mastic subdivides the concept of activity in two aspects: physical (rigidity) and chemical (adhesivity), independent of its fineness, but dependent of its form, texture, specific surface and nature. 

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