Performance estimation for concretes made with recycled aggregates of construction and demolition waste of some Brazilian cities

Materials Research

Antonio Eduardo Bezerra Cabral²  Valdir Schalch¹  Denise Carpena Coitinho Dal Molin¹  José Luis Duarte Ribeiro¹ 

[1] ,Universidade Federal do Ceará Centro de Tecnologia Departamento de Engenharia Estrutural e Construção CivilFortaleza CE ,Brasil

关键词: CDW;    waste variability;    recycled aggregate;    concrete;   

DOI  :  10.1590/S1516-14392012005000119

来源: SciELO

【 摘 要 】

The aim of this paper is to verify the influence of composition variability of recycled aggregates (RA) of construction and demolition wastes (CDW) on the performance of concretes. Performance was evaluated building mathematical models for compressive strength, modulus of elasticity and drying shrinkage. To obtain such models, an experimental program comprising 50 concrete mixtures was carried out. Specimens were casted, tested and results for compressive strength, modulus of elasticity and drying shrinkage were statistically analyzed. Models inputs are CDW composition observed at seven Brazilian cities. Results confirm that using RA from CDW for concrete building is quite feasible, independently of its composition, once compressive strength and modulus of elasticity still reached considerable values. We concluded the variability presented by recycled aggregates of CDW does not compromise their use for concrete building. However, this information must be used with caution, and experimental tests should always be performed to certify concrete properties.

【 授权许可】

CC BY   
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