Chemical and Ecotoxicological Long-term Behavior of New Materials for Quarry Back-Filling and Underground Constructions

Title: Chemical and Ecotoxicological Long-term Behavior of New Materials for Quarry Back-Filling and Underground Constructions
Author(s): Lapa
Paper category : conference
Book title: International RILEM Conference on the Use of Recycled Materials in Building and Structures
Editor(s): E. Vázquez, Ch. F. Hendriks and G.M.T. Janssen
Print-ISBN: 2-912143-52-7
e-ISBN: 2912143756
Publisher: RILEM Publications SARL
Publication year: 2004
Pages: 373 - 382
Total Pages: 10
Nb references: 5
Language: English

Abstract: The main aim of the Valomat project was the development of new materials for quarry back-filling
and underground constructions, based on the reuse of bottom ashes from MSWI. Bottom
ashes were collected in six incineration plants of Europe. Some of them were selected for the
development of new materials.
One task of this project comprised the study of the long-term behavior of new materials, under
simulated conditions of environmental exposure. Three different scenarios were studied. For each
scenario, a pilot plant was constructed and the new materials were studied under laboratory
conditions or natural weather. The long-term behavior of these materials was assessed through
the characterization of chemical and ecotoxicological properties of the leachates.
The chemical contamination and the ecotoxicological levels of the leachates were relatively
low, although different levels had been determined for the three different scenarios. The
immersion in dechlorinated tap water (scenario S1) had shown the highest emission levels of
chlorides, sulphates, DOC, and Al, especially for the materials B2/1 and B2/2. The lowest
ecotoxicological and chemical levels were determined in the scenario in which the materials were
buried in a sieved soil.

Online publication: 2004-09-29
Publication type : full_text
Public price (Euros): 0.00
doi: 10.1617/2912143756.042