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Laboratoryjne badania procesu deterioracji trawertynowych elementów konstrukcyjnych

Pinińska J., Bobrowska A., Pamukcu C.

Przegląd Geologiczny

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2010

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Vol. 58, nr 9/2

879-885

EN

Aging of masonry objects results in deterioration of strength parameters and building and decorative value of stone. This slowly developing process can be modeled in laboratory, which makes possible direct observation of destructive impact of atmospheric pollution and salty water or acid rains in the course of artificial seasoning. The paper presents results of analysis of artificial aging of travertine under influence of frost, high temperature and crystallization of salt solutions. The tests were carried out on fresh samples of travertine collected in quarries at Raciszyn in Poland and Hierapolis in Turkey. Travertine extracted from in these quarries was used in the past and is still used as building and decorative stone in masonry works. Comparative method of detecting micro-structural metamorphose was performed with the application of microscopic analysis (SEM) and the strength and ultrasonic diagnostic analyses. The quantitative characteristics of deterioration state of travertine is described by the proposed deterioration index (I), based on nondestructive determination of wave propagation velocity in fresh rock sample (Vpo) and in the same sample under influence of sequential stages of modeled deterioration (Vpn) with respect to subsequent changes of compressive strength (Rc). According to test results, resistance of the Raciszyn travertines to frost, high temperature and crystallization of salt is about 2 times higher than in the case of those from Hierapolis.

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Martwice wapienne w architekturze Krakowa

Rajchel J.

Geologia / Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie

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2009

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T. 35, z. 2/1

313-322

EN

A variety of travertines can be found in the architecture of Kraków. The Polish travertines (Holocene) are quarried in the Silesian-Cracow Monocline, and have found their applications in sepulchral-sacral architecture. Their equivalents brought from outside Poland are used as polished decorative stones. The most popular are: the Italian Daino Reale (Neogene) and the Classico Romano (Holocene) and the Iranian Azarshar Red (Pleistocene). All of them display stromatolite structures and oncoides.

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Badania ultradźwiękowe w ocenie deterioracji skał

Pinińska J., Bobrowska A., Pamukcu C.

Geologia / Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie

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2009

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T. 35, z. 2/1

633-639

EN

In an ageing process of stonework elements their strength and decoration value are changing. Ultrasonic method of nondestructive testing is especially applicable in determining the state of the art of rock deterioration and in forecasting and controlling further stages of changes. Tested were, alike, fresh rock samples and samples of deteriorated stoneworks from various locations, subjected to artificial ageing by cyclic freezing, saturating with salt solutions leading to fast drying and crystallizing of salts, and increasing of rock temperature. The poster shows results of comparable researches of ageing travertines from the Raciszyn quarry in Poland and from two locations in Hierapolis, Turkey.