Navigation Links
New mineralogical techniques contribute to prevent national heritage damage
Date:4/1/2008

This release is available in Spanish.

Humidity, environmental pollution, cleaning with aggressive products for the chemical composition of the rock, etc give rise to the appearance of salts which cause stone decomposition, paint coats detachment, dust accumulation, etc.

The treatments used up to now to deal with the problem have been directed, almost exclusively, to preserve the beauty of the affected monument, assuming, with an almost fatalist attitude, that the damage will go on as an effect of passing of time. European experts joint in the SALTCONTROL project have collaborated in a new work line to deal with the problem: Blocking inside the stone the mineral salt crystallization process that ends up destroying it.

One of the works carried out in the framework of SALTCONTROL is the doctoral thesis Prevencin del dao debido a cristalizacin de sales en el patrimonio histrico construido mediante el uso de inhibidores de cristalizacin (Damage prevention due to salt crystallization in national heritage through the use of crystallization inhibitors), read by Encarnacin Mara Ruiz Agudo, under the supervision of Prof Carlos Manuel Rodrguez Navarro; as well as several papers published by scientific journals such as Journal of Physical Chemistry, Environmental Geology, Scanning y Journal of the Japanese Association for Crystal Growth.

According to Ruiz Agudo ( Centro Andaluz del Medio Ambiente Department of Mineralogy and Petrology of the University of Granada) ornamental porous materials damage due to salt attack is one of the most aggressive alteration mechanisms that affect constructed heritage. In the last decades, we have developed different methods to prevent or reduce the damage due to salt crystallization in ornamental rock pores, almost all with little success.

thesiss research line and the above mentioned papers have followed the recent techniques that intend to use additives to modify the crystallization process and prevent or reduce the damage produced in the rock. Up to now, most of the works in this field have assessed the efficiency of these treatments in slightly soluble salts, such as calcium and barium sulphates. The thesis has proved the effectiveness of this type of treatment in highly soluble salts, such as sodium and magnesium sulphates, as well as sodium nitrate, which can usually be found in historic buildings.

Applied science

The research work has been applied to the case of the effects of these treatments in the rock extracted in Santa Pudias quarries (Esczar,-Granada), used in the construction of Renaissance buildings in Granada such as the Monastery of San Jernimo, the Cathedral or the Royal Chapel. These buildings show strong alteration phenomenon due to crystallization in sodium sulphate, magnesium and sodium nitrate.

The work has conducted to the carrying out of salt crystallization tests in laboratory, which simulate alteration processes due to salt crystallization in the bases on historic buildings walls. Later says Ruiz Agudo-, we prepared a method for the implementation of the treatment developed in practical cases of ornamental stone materials conservation. Finally, in a last phase of development of the research project, we applied such treatment in pilot areas on the Monastery of San Jernimo (Granada), where there had been important problems due to salt crystallization.

The final result of the research work proposes the application of low-cost additives, which have proved to be very effective in the fight against the problems of ornamental porous materials. On the other hand, the research work involves a methodology to deal with the study of damage caused by salts and the selection of the most adequate type of additive for a specific substrate and type of salt. The object of the methodology is the study of the problem in situ, in order to carry out laboratory tests that allow to select the concentration, pH and the most appropriate application method and finally to go back to the building to test the treatment in pilot areas, which permits to guarantee the success in the application of salt crystallization inhibitors inside stony materials, as we have proved in San Jernimo.


'/>"/>

Contact: Encarnacin M Ruiz Agudo
encaruiz@ugr.es
34-958-248-535
Universidad de Granada
Source:Eurekalert

Related biology news :

1. Software Techniques Inc. Selects M2SYS Fingerprint Software to Meet Continuous Growth and Demand for Desktop Biometric Time & Attendance Solutions
2. New techniques create butanol
3. Powerful yet reliable proteomics techniques are the focus of a new methods book
4. KGI professor contributes new insights on jumping genes
5. Study proposes new theory of how viruses may contribute to cancer
6. 4 days of REM sleep deprivation contributes to a reduction of cell proliferation in rats
7. Long-term use of mechanical ventilation contributes to the deterioration of human diaphragm muscle
8. Controlling for size may also prevent cancer
9. Avocados may help prevent oral cancer, OSU study shows
10. Dietary calcium could possibly prevent the spread of breast cancer to bone
11. Bilberry extract -- can it help prevent certain cancers?
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:1/25/2017)... YORK , Jan. 25, 2017 The ... Access Management (IAM) lifecycle is comprised of a ... for the purpose of maintaining digital identities and ... resources and applications. There are significant number of ... from time to time by optimizing processes and ...
(Date:1/21/2017)... Jan 20, 2017 Research and Markets has ... 2017-2021" report to their offering. ... The global voice recognition biometrics market to ... The report covers the present scenario and the growth ... calculate the market size, the report considers the revenue generated from ...
(Date:1/18/2017)... 2017 MedNet Solutions , an ... entire spectrum of clinical research, is proud to ... for the organization in terms of corporate growth, ... products and services. The company,s exceptional achievements can ... iMedNet ™ – ...
Breaking Biology News(10 mins):
(Date:2/20/2017)... 2017  This Report analyzes the worldwide markets for Bioinformatics in ... provides separate comprehensive analytics for the US, Canada ... Asia-Pacific , Latin America , ... http://www.reportlinker.com/p04707099-summary/view-report.html ... Annual estimates and forecasts are provided for the period 2015 ...
(Date:2/20/2017)... Philadelphia, PA (PRWEB) , ... ... ... technologies to improve therapeutic success among radiotherapy patients, prevent chest wall collapses ... for femur fracture alignments will receive a total of $600,000 in funding ...
(Date:2/19/2017)... ... February 19, 2017 , ... Expanding Portfolio to Include Lab ... equipment with the goal of expanding the reach of its quality and precision ... water analysis meters were introduced into the market in 2014. , The OHAUS ...
(Date:2/17/2017)... February 17, 2017 According ... by Product (Consumables, Service), Type (Safety, Efficacy, Validation), ... Drug Discovery and Development, Disease-Risk) - Global Forecast ... projected to reach USD 53.34 Billion by 2021 ... a CAGR of 13.8% during the forecast period ...
Breaking Biology Technology: