Derivative dilatometric study of natural zeolites

Ullrich, Bernd; Adolphi, P.; Zwahr, H.; Schomburg, J.

doi:10.1016/0144-2449(89)90095-x

Cited by 6 publications

(1 citation statement)

References 3 publications

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“…In the past years, the thermodilatometric behavior of zeolites and clays has been studied [23][24][25][26][27][28][29][30][31][32][33][34][35]. In particular, these studies have been performed on zeolite A [23][24][25][26][27][28][29], synthetic zeolite X and Y [24,28], natural natrolite, thomsonite, scolecite, heulandite, clinoptilolite, stilbite [30,31], natural chabazite [32], and various phillipsite and chabazite bearing tuffs [33]. In these works, the thermodilatometric behavior of the various zeolites or zeolite-bearing materials have been found to be related to: (1) shrinkage by dehydration;…”

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confidence: 99%

Thermodilatometric Study of the Decay of Zeolite-Bearing Building Materials

et al. 2021

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Six zeolite-bearing rocks, often used as building materials, were analyzed by thermodilatometry, together with a rock not bearing zeolites and a plaster covering a containing wall made of zeolite-bearing dimension stones, up to 250 °C. The main results obtained were the following: (i) the zeolite-bearing rocks exhibited very small, if any, positive variation of ΔL/Lo (%) up to about 100 °C, whereas they more or less shrank in the temperature range 100–250 °C (final values ranging from −0.21 to −0.92%); (ii) the rock not bearing zeolites regularly expanded through the whole temperature range, attaining a final value of 0.19%; (iii) the plaster showed a thermodilatometric behavior strongly affected by its water content. Obtained results were interpreted based on plain thermal expansion, shrinkage by dehydration, cation migration and thermal collapse of the zeolitic structure. The decay of the zeolite-bearing building materials was essentially related to: (i) the large differences recorded in the thermodilatometric behavior of the various rocks and the plaster; (ii) the different minerogenetic processes that resulted in the deposition of the various zeolite-bearing rocks.

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