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

Bruno Molino¹  Annamaria De Vincenzo²  Claudio Ferone³  Francesco Messina³  Francesco Colangelo³ 

[1] Department of Biotechnology and Territory, University of Molise, Campobasso 86100, Italy; E-Mail:;School of Engineering, University of Basilicata, Potenza 85100, Italy; E-Mail:;Department of Engineering, University of Naples “Parthenope”, Centro Direzionale Isola C4, Naples 80143, Italy; E-Mails:

关键词: sustainability;    reservoir;    silting-up;    sediments;    geopolymers;    binders;   

DOI  :  10.3390/ma7085603

来源: mdpi

【 摘 要 】

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.

【 授权许可】

CC BY   
© 2014 by the authors; licensee MDPI, Basel, Switzerland.