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Feasibility study of lightweight aggregates using sewage sludge for nonstructural concrete



Title: Feasibility study of lightweight aggregates using sewage sludge for nonstructural concrete
Author(s): K. Mun
Paper category : conference
Book title: RILEM International Symposium on Environment-Conscious Materials and Systems for Sustainable Development
Editor(s): N. Kashino and Y. Ohama
Print-ISBN: 2-912143-55-1
e-ISBN: 2912143640
Publisher: RILEM Publications SARL
Publication year: 2004
Pages: 155 - 161
Total Pages: 7
Nb references: 6
Language: English


Abstract: The purpose of this study is to efficiently treat the sewage sludge discharged from sewage treatment plants and evaluate the feasibility of the manufacture of lightweight aggregates using a large quantity of sewage sludge. Sintered lightweight aggregates using sewage sludge are experimentally manufactured with various mass ratios of clay: sewage sludge by a rotary kiln, and tested for density, water absorption, abrasion loss, crushing value, impact value and heavy metal leaching. Their physical properties are compared to those of a commercial sintered lightweight aggregate for nonstructural concrete. As a result, an experimentally manufactured lightweight aggregate with a recommendable sewage sludge content of 75% [clay: sewage sludge=100:300(by mass)] is similar or superior in physical properties to the commercial sintered lightweight aggregate. In particular, the water absorption of the experimental lightweight aggregate is about half or less of that of the commercial sintered lightweight aggregate. Any toxic heavy metals are not detected from the experimental lightweight aggregate, it can be used as an environment-conscious artificial lightweight aggregate.


Online publication: 2004-11-24
Publication type : full_text
Public price (Euros): 0.00
doi: 10.1617/2912143640.018