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Article

Silicate Sawing Sludge Recovery in Thermo Eco-Mortar for Macroporous Plaster

1
Department of Environment, Land and Infrastructure Engineering (DIATI), Politecnico di Torino, 10129 Turin, Italy
2
I.S.I.M.—Istituto Internazionale del Marmo, 20154 Milan, Italy
3
Bunker TEK.SP.ED. srl, Casandrino (NA), 80025 Casandrino, Napoli, Italy
*
Author to whom correspondence should be addressed.
Materials 2020, 13(6), 1293; https://doi.org/10.3390/ma13061293
Received: 21 January 2020 / Revised: 6 March 2020 / Accepted: 8 March 2020 / Published: 13 March 2020
(This article belongs to the Section Construction and Building Materials)
The aim of this research was to develop a new eco-product to find a correct recovery of silicate sawing sludge by means of waste management according to European criteria. To reach this goal, a thermal eco-mortar for a macroporous plaster was developed. The main characteristics of a plaster that influence the correct choice of the mortar are good adherence with underlying support, impermeability, thermal and acoustic insulation, mechanical resistance and ability to allow transpiration processes through the wall’s perimeters. Plaster is a mortar composed of a binding part that incorporates sand with a selected particle size distribution, not greater than 2 mm. The sludge, to be used as plaster, must satisfy requirements related to thermal insulation, resistance to moisture, mechanical resistance and good injection. For this purpose, low-content metals sludge, derived from the Luserna stone flaming and cutting slabs, are to be reused as a substitute for the sands and fine particles, respectively, that are normally used to produce plasters. The laboratory tests carried out on the finished product, in accordance with European standards, are as follows: water absorption, specific density, flexural and compressive strength, before and after freeze and thaw cycles, pull out, salt crystallisation cycle resistance and thermal conductivity. Chemical and leaching tests were carried out to verify the possible release of heavy metals into the environment after installation. The product quality was demonstrated as the cement mortars, incorporating the metals, did not allow their release in nature. A sludge recovery, in an unaltered state, was provided to reduce any costs connected to a pre-treatment and to make recovery economically advantageous for the stone sector. View Full-Text
Keywords: silicate sawing sludge; eco-plaster; waste management; circular economy; waste recovery silicate sawing sludge; eco-plaster; waste management; circular economy; waste recovery
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MDPI and ACS Style

Zichella, L.; Marone, P.; Buonanno, P.; D’Amore, M.; Bellopede, R. Silicate Sawing Sludge Recovery in Thermo Eco-Mortar for Macroporous Plaster. Materials 2020, 13, 1293. https://doi.org/10.3390/ma13061293

AMA Style

Zichella L, Marone P, Buonanno P, D’Amore M, Bellopede R. Silicate Sawing Sludge Recovery in Thermo Eco-Mortar for Macroporous Plaster. Materials. 2020; 13(6):1293. https://doi.org/10.3390/ma13061293

Chicago/Turabian Style

Zichella, Lorena, Paolo Marone, Pasquale Buonanno, Marco D’Amore, and Rossana Bellopede. 2020. "Silicate Sawing Sludge Recovery in Thermo Eco-Mortar for Macroporous Plaster" Materials 13, no. 6: 1293. https://doi.org/10.3390/ma13061293

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