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Materials and Structures

, Volume 42, Issue 6, pp 739–748 | Cite as

Determination of construction and demolition recycled aggregates composition, in considering their heterogeneity

  • S. C. Angulo
  • A. Mueller
Original Article

Abstract

This paper analyzes the influence of the mass sample and the sampling procedure on the composition determination error of recycled aggregates from construction and demolition (C&D) waste, as well as the criterion of classification of mineral materials, establishing new standard recommendations. The precise composition determination depends on the mass sample as stated by the Theory of Sampling. This mass should be higher than that recommended by the EN 932-1, especially for the determination of foreign materials such as gypsum and organic materials. Special sampling procedures should be considered. By the application of the oven-dry density distribution criterion the concrete aggregate studied could fulfill the requirements for concrete use due to a more accurate quantification of particles denser than 2.0 g/cm3 compared to the visual analysis. Thus, the use of such criterion results in a more objective and a better comprehensible classification.

Keywords

Heterogeneity Theory of Sampling Composition Recycled aggregates Construction and demolition waste 

Notes

Acknowledgment

S. C. Angulo acknowledges scholarship from CNPq/Brazil.

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Copyright information

© RILEM 2008

Authors and Affiliations

  1. 1.Instituto de Pesquisas Tecnológicas do Estado de São PauloCidade UniversitáriaSao PauloBrazil
  2. 2.Bauhaus Universität Weimar, Chair of Mineral Processing of Building Materials and ReuseWeimarGermany

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