The monitoring of architectural stone surface treatments: choice of the parameters and of their threshold limit values.
The planning of maintenance tasks (preventive conservation) of stone buildings aims to preserve artifacts, to reduce the managing economic costs and to extend the lifetime of the restoration interventions. The main goal of this work is to select possible “chemical-physical parameters and of their threshold limit values for evaluating the efficiency of stone surface treatments applied for the consolidation and protection. In general, protection and consolidation interventions are carried out using polymeric and hydrophobic products. The efficiency of these treatments on the material is evaluated in a second time, considering different parameters. In particular, the determination of water absorption and the control of the colour surface value are here proposed and discussed. While these parameters are easy to determinate, to define their threshold values, above which an intervention is required, is more difficult. These values are in fact closely linked to the specific material characteristics (such as the chemical composition and the porosity), to the environmental conditions ( such as T, HR％, anthropogenic impact) and to the surface characteristics after the application of the products. Up to know, there are no clear regulations on these topics and any suggestions regarding useful parameters which can be used for monitoring the products efficiency. In this context, the determination of the surface water absorption and colour variation may be important tools for the control and the monitoring over time of the state of conservation of the architecture stone surfaces. These parameters are strongly related not only to the surface conservation state but also to products efficiency. Moreover, they can be easily measured at low cost even by specific instructed personnel.
Pei-Chun SHAO Takeyoshi TANAKA
国际会议
南京
英文
123-130
2011-10-29（万方平台首次上网日期，不代表论文的发表时间）