Survey of the facial sandstone masonry of the stone coat of historic structures with the use of non-invasive analytical techniques of ground-penetrating radar

This conservation procedure includes a description of basic steps, which must be followed to use the ground-penetrating radar and to gain useful data for composition visualization of facial sandstone masonry used in historic structures. Suitable settings of the GPR device are introduced for collecting data and the way of their processing with the aid of software. The conservation procedure applies a non-invasive analytical technique of GPR when surveying stone structures and therefore it can be a useful specifying tool of particular details during the execution phase of the construction-historical surve

Non-invasive techniques of assessment of sandstone masonry

A whole range of non-invasive assessment techniques is available today and they open new possibilities for extending building surveying possibilities of built heritage. The paper discusses their use for the assessment of facing stone masonry of the Charles Bridge in Prague

Methodology of the use of non-invasive surveying methods - ground-penetrating radar, impact-echo method and ultrasonic transmission measurement of the surface to assess the condition and construction details of the sandstone coat of buildings

The methodology describes principles of selected methods (ground-penetrating radar, impact-echo method, ultrasound), their potentials, limitations and advantages when combined during the survey of stone coats of structures. Further on, the methodology indicates the process of the measurement itself and evaluation of the collected data