Durability of self-cleaning cement-based materials

被引：29

作者：

Diamanti, Maria Vittoria ^{[1
]}

Luongo, N. ^{[2
]}

Massari, S. ^{[2
]}

Spagnolo, S. Lupica ^{[2
]}

Daniotti, B. ^{[2
]}

Pedeferri, M. P. ^{[1
]}

机构：

[1] Politecn Milan, Dept Chem Mat & Chem Engn G Natta, Via Mancinelli 7, I-20131 Milan, Italy

[2] Politecn Milan, Dept Architecture Built Environm & Construct Engn, Via Ponzio 31, I-20133 Milan, Italy

来源：

CONSTRUCTION AND BUILDING MATERIALS | 2021年 / 280卷

关键词：

Titanium dioxide; Mortar; Self-cleaning; Photocatalysis; Dye degradation; Rhodamine B; TiO2; Ageing; Durability;

D O I：

10.1016/j.conbuildmat.2021.122442

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

The use of self-cleaning materials as building materials is gaining more and more interest, but their performance characterization over time has been poorly investigated. For this purpose, accelerated durability tests were carried out on different self-cleaning materials, either based on photocatalytic principles (i.e. containing TiO2) or on the lotus effect, which were subjected to UV radiation, rain, freeze-thaw and thermal cycles variations. The accelerated ageing tests program involved different commercial materials and was aimed at a second step of characterization of their photocatalytic activity and self-cleaning ability, in order to investigate their durability and the retention of such functionality over time. With this aim, rhodamine B (Rh-B) dye degradation tests were performed. The experimental campaign proved the actual self-cleaning behaviour of these materials in their freshly produced state, but it also demonstrated the detrimental effect of ageing on their performances. Moreover, issues related to the test method emerged with special reference to the evaluation of materials durability. (C) 2021 Elsevier Ltd. All rights reserved.

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