An experimental study on Pier Luigi Nervi’s ferrocement

Ferrocement is a construction system patented by Italian Engineer Pier Luigi Nervi. It is comprised of a thin cross-section made of hydraulic cement reinforced with layers of metal wire mesh. Pier Luigi Nervi started experimenting with this material by building boats in the late 1930’s and introduced the first patent in the 1940s. With ferrocement, Nervi pioneered a novel, lightweight, and cost-effective system known for its remarkable flexibility, elasticity, and exceptional strength in relation to its mechanical properties. Ferrocement can be prefabricated as the elements can be built directly on-site and installed into the structure, becoming a perfect candidate for large-scale applications. Considered one of Pier Luigi Nervi’s most iconic buildings, Turin Exhibition Halls represent the first large-scale project where ferrocement was extensively used. Today, the ferrocement at Turin Exhibition Halls has reached an age where preservation challenges have emerged, prompting professionals to grapple with crucial questions about its conservation. The vulnerability of this material primarily stems from its slender cross-section, offering minimal protection to the embedded metal layers. In this research, a set of samples were meticulously replicated based on Nervi's original design. Experimental testing and analysis were conducted to assess its performance and to determine suitable treatment methods aimed at prolonging the life of this unique material.