High volumes of construction and demolition waste (CDW) are continuously produced worldwide. The European Commission aims to increase the recycling of non hazardous CDW to a minimum of 70% in weight terms by 2020. Hence, there is increasing pressure on researchers to focus on the valorization of these alternative materials for use in the world of construction alongside traditional materials. CDW contains materials from excavation and/or demolition and are typically heterogeneous in terms of composition, grain size, and toughness; furthermore, some particles are more sensitive to degradation processes than others. In order to increase durability while maintaining sufficient strength levels, one solution consists of chemical stabilization with cementitious binders. The paper illustrates the results of a laboratory investigation into the stabilization of CDW using cement kiln dust (CKD). Compared to ordinary Portland cements, CKD exhibits a weak binding attitude due to the limited content of oxides; hence, it has to be employed in larger quantities. The results obtained with the use of CKD are encouraging since it increases the strength and stiffness of CDW, thus leading to a material completely made up of recycled wastes and by-products usable in the formation of pavement subbases and subgrades.

Use of Cement Kiln Dust to Stabilize Construction and Demolition Waste for Pavement Applications / Bassani, Marco; Riviera, PIER PAOLO; Lillo, Francesca; Tefa, Luca. - ELETTRONICO. - (2016). (Intervento presentato al convegno 95th TRB Annual Meeting tenutosi a Washington, D.C. nel January 10th - 14th, 2016).

Use of Cement Kiln Dust to Stabilize Construction and Demolition Waste for Pavement Applications

BASSANI, Marco;RIVIERA, PIER PAOLO;TEFA, LUCA
2016

Abstract

High volumes of construction and demolition waste (CDW) are continuously produced worldwide. The European Commission aims to increase the recycling of non hazardous CDW to a minimum of 70% in weight terms by 2020. Hence, there is increasing pressure on researchers to focus on the valorization of these alternative materials for use in the world of construction alongside traditional materials. CDW contains materials from excavation and/or demolition and are typically heterogeneous in terms of composition, grain size, and toughness; furthermore, some particles are more sensitive to degradation processes than others. In order to increase durability while maintaining sufficient strength levels, one solution consists of chemical stabilization with cementitious binders. The paper illustrates the results of a laboratory investigation into the stabilization of CDW using cement kiln dust (CKD). Compared to ordinary Portland cements, CKD exhibits a weak binding attitude due to the limited content of oxides; hence, it has to be employed in larger quantities. The results obtained with the use of CKD are encouraging since it increases the strength and stiffness of CDW, thus leading to a material completely made up of recycled wastes and by-products usable in the formation of pavement subbases and subgrades.
File in questo prodotto:
Non ci sono file associati a questo prodotto.
Pubblicazioni consigliate

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11583/2640857
 Attenzione

Attenzione! I dati visualizzati non sono stati sottoposti a validazione da parte dell'ateneo