Evaluation of Uniaxial Compressive Strength Changes of Travertine Samples against Salt Crystallization: Using of a Decay Function Model

Authors

Department of Geology, Faculty of Basic Sciences, Tarbiat Modares University, Iran

Abstract

Uniaxial compressive strength is one of a major factor in choice of building stone especially when used as paving. Salt crystallization is one of the most important factors that influence the durability and strength of building stones. Mgnesium sulphate is one of destroyer salt in building stone. In this paper, fifteen travertine samples were selected and petrologic, physical and mechanical properties. these tests were used in order to assess their change of uniaxial compressive strength against salt crystallization in 14% solution of magnesium sulphate. Decay function model (Half-life and decay constant) were used to assess change of uniaxial compressive strength. Relationship between USC loss with effective porosity and Brazilian tensile strength assess with regression analyzed, also relationship between decay constant with effective porosity and BTS assess with regression analysis. Results show that UCS decrease with increment in effective porosity and decline in BTS, plus rate of loss in UCS was higher with salt re-crystallization pressures in layered stones than massive ones. The samples of higher 5% effective porosity have higher losses in UCS. Decay constant changes from 0.004 to 0.019 depending effective porosity, BTS and structure of samples.
 

Keywords

References

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