Proposta di riutilizzo degli scarti DELLE LAVORAZIONI IN LABORATORIO del Marmo di Botticino: La sostenibilità come risparmio ambientale E economico

Elisa Sala1, Alberto Clerici1, Luca Cominoli2, Irene Giustina1

1   Università degli Studi di Brescia – DICATAM, Via Branze 43 – 25123 Brescia, elisa.sala@unibs.it; alberto.clerici@unibs.it; irene.giustina@unibs.it

2   Università degli Studi di Brescia – DICATAM, Laboratorio Prove Materiali “Pietro Pisa”, Via Branze 38 – 25123 Brescia, luca.cominoli@unibs.it

ABSTRACT

The University of Brescia - DICATAM research group is engaged, since many years, in studying NHL mortars for interventions on historical building heritage. This paper deals with the reuse of the waste product of Botticino Marble resulting from cutting operations as NHL mortars aggregate. Botticino Marble is a limestone coming from the area of Brescia (IT). The research finality is to reduce disposal costs of the mud waste; environmental benefits are obtained by avoiding mud storage in landfills.

Recent studies have identified interesting application field for this material; however, many of the works focused on previously dried and stabilized mud, implying expensive operations in term of time, energy and financial losses. This research has therefore investigated the possibility of using waste mud without necessarily drying it.

The research was carried out through experimental tests, which initially included a series of mechanical tests on NHL mix obtained with waste mud; in a second experimental phase, some mix design were chosen as bedding mortar for masonry samples. For the mixes, flexural and compressive strength and elastic modulus were calculated after 28, 60, 90 days of curing; for the masonry samples, first cracking load and elastic modulus were calculated after 28 and 90 days. Weight variation was monitored over time too.

Test results encouraged the use of waste mud as an additive for NHL mortars, suggesting interesting future research developments.

Parole chiave/Key-words: fine limestone mud, Botticino Marble, NHL mortars, experimental test, recycling.