Chemical characterization of Cretan clays for the design of restoration mortars

Budak, Meral; Maravelaki-Kalaitzaki, P.

doi:10.1007/s00604-007-0927-4

Cited by 13 publications

(12 citation statements)

References 14 publications

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“…Mechanical properties depend on the binder type, aggregate versus binder ratio, grain size distribution and many other factors (Barsottelli et al 2001;Sinan 2003;Pecchioni et al 2005;Pavia et al 2006;Siegesmund et al 2007;Pavia and Toomey 2008). Chemical composition and longterm changes in mineralogy also influence the durability of mortars (Middendorf et al 2005b;Bultrini et al 2006;Tunçoku and Caner-Saltik 2006;Budak et al 2008). Although we have a thorough knowledge of historic mortars, relatively fewer studies have dealt with the recent repair mortars (Barsottelli et al 2001;Hanley and Pavia 2008;Prikryl and Š tastná 2010).…”

Section: Introductionmentioning

confidence: 94%

Time-dependent changes in the strength of repair mortar used in the loss compensation of stone

Szemerey-Kiss

Török

2011

Environ Earth Sci

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Repair mortar and mixture of repair mortar with porous limestone sand aggregate were tested under laboratory conditions. Water absorption properties and micro-fabric analyses with a combination of strength tests were applied to assess the durability and compatibility of repair mortar with porous limestone. Uniaxial compressive strength and flexural strength were measured after 3, 7, 14, 28 and 90 days of casting. Durability was tested by comparing strength test results of samples kept air dry, water saturated, dried in drying chamber, freeze-thaw and nonstandardized freeze-thaw cycles. The results indicate that with time various trends in strength were observed. In general, limestone aggregate content decreases more the compressive strength more than the flexural strength of the mortar. Standardized freeze-thaw tests of saturated samples caused a rapid material loss after 25 cycles, while freeze-thaw tests of undersaturated samples demonstrated that even after 100 cycles the test specimens still have a significant strength. Water-saturated samples that contain 50% of limestone aggregate have a 50% loss of strength in comparison with saturated repair mortar, while air-dry and water-saturated repair mortar has a minor strength difference after 90 days. The use of smaller amounts of porous limestone aggregate in repair mortar allow the preparation of repairs that are compatible with the monuments of Central Europe that were constructed from porous limestone.

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Section: Introductionmentioning

confidence: 94%

Time-dependent changes in the strength of repair mortar used in the loss compensation of stone

Szemerey-Kiss

Török

2011

Environ Earth Sci

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“…Mortars prepared with natural hydraulic lime, or air-hardening lime with pozzolanic additives, such as volcanic ash, tuffs, and ground ceramics, among other components, involve chemical processes in which water promotes the reaction of these minerals with portlandite and the precipitation of new mineral phases (calcium and aluminosilicates, for example), which results in the hardening of the mortar. For this reason, this type of binder is known as hydraulic lime [6,12,14,15].…”

Section: Lime-based Mortars: Binders and Aggregatesmentioning

confidence: 99%

Mortars from the Palace of Knossos in Crete, Greece: A Multi-Analytical Approach

et al. 2021

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The study of building materials constituting cultural heritage is fundamental to understand their characteristics and predict their behavior. When considering materials from archaeological sites, their characterization can provide not only relevant information for a broader understanding of the site and its importance and significance but can also increase knowledge about ancient materials and their performance. The Palace of Knossos is a very important archaeological site in the European history context, and its preservation benefits from the characterization of the constituent materials. Samples of mortars from this monument were collected under the scope of the H2020 HERACLES project, where a multi-analytical approach was chosen using established protocols for the different sample typologies. Instrumental techniques such as optical microscopy (OM), X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR), and simultaneous thermogravimetry and differential thermal analysis (TG–DTA) were used for the chemical, mineralogical, and morphological characterization of these mortar samples. The results indicate that the majority are lime mortars, both aerial and hydraulic, but gypsum-based mortars were also identified. Differences in the chemical composition of the samples in distinct areas of the monument allowed us to reflect on the variety of materials used in the construction of the Palace of Knossos.

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“…In recent years, mechanical properties and fabric analyses were also made [3,[10][11][12][13]. Chemical composition of the mortars were also analyzed [14][15][16]. Compatibility of the limestone and mortar was studied considering strength and durability characteristics such as mechanical resistance, water transfer properties, and physico-chemical properties [17][18][19][20].…”

Section: Introductionmentioning

confidence: 99%

Utilization of repair mortar for the loss compensation of Hungarian porous limestone

Szemerey-Kiss¹,

Török²

2014

Epitoanyag - JSBCM

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Different ready-made, commercially available (in Hungary) stone repair mortars and laboratory mixed, newly designed mortars were tested under different conditions in the laboratory. the mortars had different aggregate and binder content. the aim of the research was to understand the influence of the different binders and various amounts of limestone aggregate on the properties of mortar. During the laboratory tests more than 550 specimens were analyzed according to the en standards. Pure repair mortars have higher strength and lower capillary activity than the Hungarian porous limestones. Added aggregate can increase the compatibility of the commercially available mortars, but at some mortars it may result a drastic decrease in strength. newly designed mortars have similar mechanical and hydrotechnical properties to the tested porous limestones.

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Chemical characterization of Cretan clays for the design of restoration mortars

Cited by 13 publications

References 14 publications

Time-dependent changes in the strength of repair mortar used in the loss compensation of stone

Time-dependent changes in the strength of repair mortar used in the loss compensation of stone

Mortars from the Palace of Knossos in Crete, Greece: A Multi-Analytical Approach

Utilization of repair mortar for the loss compensation of Hungarian porous limestone

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