Study on the Environmental Impact of Lightweight Aggregates Production Incorporating Cellulose Industrial Residues

Title: Study on the Environmental Impact of Lightweight Aggregates Production Incorporating Cellulose Industrial Residues
Author(s): Pinto
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: 771 - 777
Total Pages: 7
Nb references: 12
Language: English

Abstract: This paper presents a study regarding the incorporation of cellulose residues to produce
expanded-clay lightweight aggregates to be further used in construction industry. This seems
to be a valuable way to turn a waste into an alternative raw material, avoiding the actual waste
disposal in landfill and subsequent impacts.
Raw materials including the waste were characterized (chemical, physical, thermal and
mineralogical) and the influence of the cellulose industrial residues on the lightweight
aggregates final properties such as compressive strength, apparent density and water
absorption is presented.
Special concern was taken in the environmental impact in the production and utilisation of the
"new product", by performing leaching tests and gaseous emission analyses (particles, NOx,
SOx, HF, HCl, CO, organic, heavy metals by EPA procedures) during several semi- industrial
trials.
The results obtained in the leaching test showed that the amounts of those elements are well
below the legal criteria, which points out that these lightweight aggregates have negligible
contaminant potential. The gaseous emissions were also similar to the ones with no addition.
From the industrial testing, moderate additions of cellulose residues to clay originate useful
expanded lightweight aggregates being an alternative route in the valorisation of a waste.

Online publication: 2004-09-29
Publication type : full_text
Public price (Euros): 0.00
doi: 10.1617/2912143756.085