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Materials 2014, 7(8), 5603-5616; doi:10.3390/ma7085603

Recycling of Clay Sediments for Geopolymer Binder Production. A New Perspective for Reservoir Management in the Framework of Italian Legislation: The Occhito Reservoir Case Study

1
Department of Biotechnology and Territory, University of Molise, Campobasso 86100, Italy
2
School of Engineering, University of Basilicata, Potenza 85100, Italy
3
Department of Engineering, University of Naples "Parthenope", Centro Direzionale Isola C4, Naples 80143, Italy
*
Author to whom correspondence should be addressed.
Received: 14 June 2014 / Revised: 9 July 2014 / Accepted: 21 July 2014 / Published: 31 July 2014
(This article belongs to the Special Issue Recycled Materials)
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Abstract

Reservoir silting is an unavoidable issue. It is estimated that in Italy, the potential rate of silting-up in large reservoirs ranges from 0.1% to 1% in the presence of wooded river basins and intensive agricultural land use, respectively. In medium and small-sized reservoirs, these values vary between 0.3% and 2%. Considering both the types of reservoirs, the annual average loss of storage capacity would be of about 1.59%. In this paper, a management strategy aimed at sediment productive reuse is presented. Particularly, the main engineering outcomes of an extensive experimental program on geopolymer binder synthesis is reported. The case study deals with Occhito reservoir, located in Southern Italy. Clay sediments coming from this silted-up artificial lake were characterized, calcined and activated, by means of a wide set of alkaline activating solutions. The results showed the feasibility of this recovery process, optimizing a few chemical parameters. The possible reuse in building material production (binders, precast concrete, bricks, etc.) represents a relevant sustainable alternative to landfill and other more consolidated practices. View Full-Text
Keywords: sustainability; reservoir; silting-up; sediments; geopolymers; binders sustainability; reservoir; silting-up; sediments; geopolymers; binders
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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MDPI and ACS Style

Molino, B.; De Vincenzo, A.; Ferone, C.; Messina, F.; Colangelo, F.; Cioffi, R. Recycling of Clay Sediments for Geopolymer Binder Production. A New Perspective for Reservoir Management in the Framework of Italian Legislation: The Occhito Reservoir Case Study. Materials 2014, 7, 5603-5616.

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