STUDY OF RECYCLED AGGREGATES MANUFACTURED WITH BIOMASS BOTTOM ASH FOR APPLICATION IN CEMENT TREATED GRANULAR MATERIALS

Author(s): Cabrera M., Agrela F., Rosales J., Dorado C., Galvín A.P.
Book Title: III Progress of Recycling in the Built Environment
Editor: I. Martins, C. Ulsen and S. C. Angulo
e-ISBN: 978-2-35158-158-2
Publisher: RILEM Publications SARL
Publication year: 2015
Pages: 184-191
Total Pages: 8
Language: English

Abstract: Recently, environmental protection has a great concern in world, where recycling of has become a viable option to be incorporated into roads applications. A specific example of this may be the reuse of residues as construction and demolition waste (C&DW) of buildings or bottom ash from biomass (BBA).

The topic of the present research is to evaluate the use of recycled mixed aggregates (RMA) and recycled concrete aggregates (RCA) from C&DW, and BBA in the manufacture of Cement Treated Granular Materials (CTGM). The materials were characterized under standard laboratory tests and the effect of compaction was tested in different specimens. For that, their physical properties were determined according to standard laboratory procedures and their mechanical behavior was analyzed according to the following parameters: compressive strength, resilient modulus and dimensional changes.

However, it is essential not only to evaluate their physical and mechanical properties but also the environmental impact derived from their second cycle-life must be assessed in detail.

The present research is focused also on the analysis of the environmental pollution potential of RMA manufactured with BBA (with 3.5% cement). This manuscript studies the maximum potential leachable of the granular materials. Then, based on the compliance test (UNE 12457-3) materials are classified based on their hazardous potential according to the Landfill Directive 2003/33/EC.

Subsequently, the performance of the test tank (NEN 7343) allowed to analyze the behavior of RMA mixed with BBA samples as monoliths. Finally, different groups of pollutants were established according to the highest pollution levels and the different behavior leaching patterns at long-term were identified.

Online publication: 2015
Publication Type: full_text
Public price (Euros): 0.00