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Lightweight insulating concretes with rice husk  
Juli¨¢n Salas, Marina Alvarez and Janer Veras*
*Instituto Eduardo Torroja, Apartado 19.002, Madrid, España
       
Available online 19 February 2003.

Abstract
The aim of this paper is to determine the characteristics of lightweight insulating  concrete  using  rice husk  in the natural state or treated with a 5% lime solution. Reported in the paper are the compressive strength results and the cement contents in each one of the eleven mixes prepared by the substitution of sand and gravel with  rice husk. The concretes  studied might be defined as materials with hybrid characteristics between lightweight structural  concretes  and insulating  concretes.
Keywords: Lightweight  concretes ; insulating  concretes; rice husk; concrete  aggregates; agricultural wastes; strength of materials; compressive strength; density; composite materials;  concrete  construction
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