Lightweight composite concrete produced with water treatment sludge and sawdust: Thermal properties and potential application


Autoria(s): Sales, Almir; SOUZA, Francis Rodrigues de; SANTOS, Wilson Nunes dos; ZIMERD, Alexsandro Mendes; ALMEIDA, Fernando do Couto Rosa
Contribuinte(s)

UNIVERSIDADE DE SÃO PAULO

Data(s)

18/10/2012

18/10/2012

2010

Resumo

The main objective of this study was to evaluate the potential application of a lightweight concrete produced with lightweight coarse aggregate made of the water treatment sludge and sawdust (lightweight composite), by determining the thermal properties and possible environmental impact of future residue of this concrete. Two types of concrete were prepared: concrete produced with the lightweight composite dosed with cement/sand/composite/water in a mass ratio of 1:2.5:0.67:0.6 and conventional concrete dosed with cement/sand/crushed stone/water in a mass ratio of 1:4.8:5.8:0.8. The thermal properties were determined by the hot wire parallel technique. The possible environmental impact was measured using the procedures and guidelines of the Brazilian Association of Technical Standards - ABNT. The concrete produced with the lightweight composite presented a 23% lower thermal conductivity than the conventional concrete. The concrete produced with the lightweight composite presented a set of thermal properties suitable for the application of this concrete in non-structural sealing elements. The concentration of aluminum in the solubilized extract of the concrete produced with the lightweight composite was much lower than the concentration of aluminum in the water treatment sludge, confirming the possible reduction of environmental impact of this composite for use in concrete. (C) 2010 Elsevier Ltd. All rights reserved.

Identificador

CONSTRUCTION AND BUILDING MATERIALS, v.24, n.12, Special Issue, p.2446-2453, 2010

0950-0618

http://producao.usp.br/handle/BDPI/17647

10.1016/j.conbuildmat.2010.06.012

http://dx.doi.org/10.1016/j.conbuildmat.2010.06.012

Idioma(s)

eng

Publicador

ELSEVIER SCI LTD

Relação

Construction and Building Materials

Direitos

restrictedAccess

Copyright ELSEVIER SCI LTD

Palavras-Chave #Lightweight concrete #Thermal conductivity #Water treatment sludge #COMPRESSIVE STRENGTH #AGGREGATE #ASH #Construction & Building Technology #Materials Science, Multidisciplinary
Tipo

article

proceedings paper

publishedVersion