Colour change evaluation on UV radiation exposure for P?un-Repedea calcareous geomaterial

International Conference on Innovative Research - ICIR Euroinvent 2016

Pelin, V.^1 ; Sandu, I.^2 ; Munteanu, M.^1 ; Iurcovschi, C.T.^1 ; Gurlui, S.^3 ; Sandu, A.V.^4 ; Vasilache, V.^2 ; Brnzil, M.^5 ; Sandu, I.G.^6,7

Alexandru Ioan Cuza University, Faculty of Geography - Geology, Doctoral School of Chemistry and Life Science and Earth, Carol I Blvd, no. 20A, Iai

700505, Romania^1

Alexandru Ioan Cuza University, Interdisciplinary Platform ARHEOINVEST, Carol I Blvd, no. 11, Iai

700506, Romania^2

Alexandru Ioan Cuza University, Faculty of Physics, Carol I Blvd, no. 11, Iai

700506, Romania^3

Faculty of Technology, Universitas Ubudiyah Indonesia (UUI), Jln Alue Naga Desa Tibang, Banda Aceh, Indonesia^4

Alexandru Ioan Cuza University, Faculty of Geography - Geology, Carol I Blvd, no. 20A, Iai

700505, Romania^5

Gheorghe Asachi Technical University, Faculty of Materials Science and Engineering, Dimitrie Mangeron Street, no. 61A, Iai

700050, Romania^6

Romanian Inventors Forum, Sf. PetruMovil Street, no. 3, Iai

700089, Romania^7

关键词: Artificial ageing;    Colour change;    Hydrophobizations;    Irradiance measurement;    Natural stones;    Porous surface;    Radiation Exposure;    Surface hydrophobization;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/133/1/012061/pdf
DOI  :  10.1088/1757-899X/133/1/012061

来源: IOP

【 摘 要 】

When talking about the preservation treatments that can be applied to natural stones used in different constructions, the surface hydrophobization plays an important part, especially when referring to porous surfaces like the calcareous oolithic stones specific to Repedea area, Iasi County, Romania. The present paper presents a method that evaluates the hydrophobization efficiency of two types of pellicles, involving UV artificial ageing and colorimetric analysis of the treated surfaces. The evaluation was done through continuous colorimetric monitoring and by comparing the evolution of the chromatic modifications of the two treated surfaces with the original colorimetric values and with the witness area, which was exposed to UV radiations under the same conditions, but left chemical untreated. The techniques used during this experiment were: CIE L∗a∗b∗ colorimetry, OM, SEM-EDX, UV radiation exposure and Spectrum Irradiance Measurement.