Cultural heritage

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System for measuring the expansion coefficient in three orthogonal directions.

This device is for measuring expansion in stone specimens and polymeric material (used for conservation of stone) following thermo-hygrometric variations.

Measurements are taken contemporaneously in three directions at right angles to each other in a temperature range between 0°C and 80°C. The system is designed to determine the linear thermal expansion coefficient and the coefficient of linear expansion by humidity exposure.

The system is made of a special material with a very low thermal expansion coefficient; specimen expansions are measured using contact displacement sensors, positioned at right angles to the surface of the specimen. Alternatively, strain gauge transducers may be used.

Peel Test – System for measuring the consistency and adhesiveness of surfaces

This system makes it possible to conduct 180° adhesiveness tests on standardised adhesive tape (of a maximum length of 100 mm) on a determined material in controlled speed conditions.

Adhesion strength is measured by a load cell integral to the moving part of the system and connected directly to the tape grip area. The quantity of material removed is also measured by an analytical balance. With this system it is possible to perform tests on various materials and in particular on stone materials.

System for measuring apparent volume

The system calculates the apparent volume of materials by measuring the buoyancy exerted by a material when submerged in mercury. The main components of the system are:

a thermostatic bath for keeping the temperature and density of mercury constant
a mercury container
a load cell for measuring hydrostatic pressure
a needle system for submerging specimens in mercury.