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Using LADAR to Characterize the 3-D Shape of Aggregates: Preliminary Results.


pdf icon Using LADAR to Characterize the 3-D Shape of Aggregates: Preliminary Results. (866 K)
Garboczi, E. J.; Cheok, G. S.; Stone, W. C.

Cement and Concrete Research, Vol. 36, No. 6, 1072-1075, June 2006.

Keywords:

aggregates; concretes; lasers; x-ray tomography; rocks

Abstract:

Previous publications have shown how a combination of X-ray computed tomography and spherical harmonic series could be used to characterize the 3-D shape of rocks used for aggregates in concrete. The X-ray computed tomography was used to obtain the raw 3-D numerical data for the coordinates of the aggregate surface. In this paper, we demonstrate how laser detection and ranging (LADAR) numerical data can replace X-ray computed tomography data and be used in conjunction with spherical harmonic series analysis to analyze the 3-D shape of aggregates.