Optimization of the Application of Commercial Hydrophobic Coatings for Natural Stone Protection and Preservation

被引:0
作者
Hashim, Hurraira [1 ]
Dias, Luis [1 ,2 ]
Martins, Sergio [1 ,2 ]
Pires, Vera [1 ,2 ,3 ]
Costa, Mafalda [1 ,2 ]
Barrulas, Pedro [1 ,2 ,4 ]
机构
[1] Univ Evora, HERCULES Lab, Palacio Vimioso,Largo Marques Marialva 8, P-7000809 Evora, Portugal
[2] Evora Univ, Associate Lab Res & Innovat Heritage Arts Sustaina, Largo Marques Marialva 8, P-7000809 Evora, Portugal
[3] Univ Evora, Colegio Luis Antonio Verney, Sch Sci & Technol, Lab Mech Tests LEM, R Romao Ramalho 59, P-7000671 Evora, Portugal
[4] Univ Evora, Colegio Luis Antonio Verney, Sch Sci & Technol, Dept Chem & Biochem, R Romao Ramalho 59, P-7000671 Evora, Portugal
来源
HERITAGE | 2024年 / 7卷 / 07期
关键词
natural stone; stone deterioration; hydrophobic coatings; built heritage; conservation; SURFACES;
D O I
10.3390/heritage7070165
中图分类号
C [社会科学总论];
学科分类号
03 ; 0303 ;
摘要
Natural stone has been used worldwide in the construction of archaeological and historical heritage. However, its preservation continues to be threatened by weathering and degradation phenomena. Water is widely recognized as the most threatening external component that contributes to stone deterioration, increasing the need for the development of protective hydrophobic coatings to eliminate water penetration. This study intends to contribute to the better understanding of natural stone treatment strategies to prevent water penetration and subsequent stone alteration by studying the effect of coating and stone substrate temperatures, and the number of coating applications, on the effectiveness, compatibility, and durability of commercial hydrophobic coatings. The results obtained revealed that while more than one application increases coating hydrophobic effectiveness, it frequently leads to changes in the aesthetic appearance of natural stone, including whitening and darkening of the substrate's original hues. Improved hydrophobic effectiveness (maximum gain of approximate to 9%) is also achieved when applying the commercial coatings at 4 degrees C to natural stone substrates maintained at room temperature, conditions that are feasible to be used in real life. Additionally, the commercial coating composed of silane/siloxane with modified fluorinated additives was found to be the most effective and durable hydrophobic solution.
引用
收藏
页码:3495 / 3510
页数:16
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