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Dama de Elche: pigments, surface coating and stone of the sculpture

Title: Dama de Elche: pigments, surface coating and stone of the sculpture
Author(s): M. P. Luxán, J. L. Prada, F. Dorrego
Paper category : journal
Serial title: Materials and Structures
Abreviated Serial title: Mater. Struct.
ISSN: 1359-5997
Publisher: RILEM Publications SARL
Volume: 38
Issue: 277
Issue date: 2005-04-01
Publication year: 2005
Pages: 419 - 424
Total Pages: 6
Nb references: 28
Language: English

Abstract: In this study, the suitability of the threshold alkali level, TAL, the kinetic parameter, ln k, and the microstructural disorder coefficient, Cd, of the aggregates, taken as alkali-silica reactivity criteria, was assessed using different typologies of Italian natural ASR-susceptible aggregates of known field performance.
The TAL, ln k, and Cd were determined using a modified version of the RILEM AAR-3 concrete prism expansion test, the ASTM C1260 mortar-bar expansion test, and the infrared spectroscopy test, respectively.
It was found that the three reactivity criteria are all appropriate for discriminating between reactive and innocuous aggregates.
However, the TAL proves to be a more suitable criterion for interpreting the field performance data of the aggregates investigated.
There exists a linear relationship between TAL and ln k, or between TAL and Cd, which provides a rapid means of estimating the threshold alkali levels of ASR-susceptible aggregates from the results of the ultra-accelerated mortar-bar test and/or the infrared spectroscopy test.
A TAL-based classification of the degree of reactivity of the aggregates, as well as some modifications of the reactivity domains established by the infrared spectroscopy method are also proposed.

Online publication: 2005-01-21
Classification: Scientific Reports
Publication type : full_text
Public price (Euros): 0.00
doi: 10.1617/14145

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