Improvement of Bearing Capacity in Recycled Aggregates Suitable for Use as Unbound Road Sub-Base
by
Laura Garach 1,*, Mónica López 2,†, Francisco Agrela 3,†
, Javier Ordóñez 2,†, Javier Alegre 2,† and José Antonio Moya 4,†
Laura Garach 1,*, Mónica López 2,†, Francisco Agrela 3,†, Javier Ordóñez 2,†, Javier Alegre 2,† and José Antonio Moya 4,†
1
Department of Civil Engineering, University of Granada, Severo Ochoa s/n, Granada 18071, Spain
2
Department of Construction and Project Engineering, University of Granada, Severo Ochoa s/n, Granada 18071, Spain
3
Area of Construction Engineering, University of Córdoba, Ed. Leonardo Da Vinci, Campus Rabanales, Ctra N-IV, Km-396, Córdoba 14014, Spain
4
Ministry of Development, Avda Madrid, 7, Granada 18071, Spain
*
Author to whom correspondence should be addressed.
†
These authors contributed equally to this work.
Academic Editor: Jorge de Brito
Materials 2015, 8(12), 8804-8816; https://doi.org/10.3390/ma8125493
Received: 25 September 2015 / Revised: 2 December 2015 / Accepted: 4 December 2015 / Published: 16 December 2015
(This article belongs to the Section Manufacturing Processes and Systems)
Recycled concrete aggregates and mixed recycled aggregates are specified as types of aggregates with lower densities, higher water absorption capacities, and lower mechanical strength than natural aggregates. In this paper, the mechanical behaviour and microstructural properties of natural aggregates, recycled concrete aggregates and mixed recycled aggregates were compared. Different specimens of unbound recycled mixtures demonstrated increased resistance properties. The formation of new cement hydrated particles was observed, and pozzolanic reactions were discovered by electronon microscopy in these novel materials. The properties of recycled concrete aggregates and mixed recycled aggregates suggest that these recycled materials can be used in unbound road layers to improve their mechanical behaviour in the long term.
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Keywords:
self-cementing; mechanical properties; recycled aggregates; pozzolanic reactions; electronic microscopy
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MDPI and ACS Style
Garach, L.; López, M.; Agrela, F.; Ordóñez, J.; Alegre, J.; Moya, J.A. Improvement of Bearing Capacity in Recycled Aggregates Suitable for Use as Unbound Road Sub-Base. Materials 2015, 8, 8804-8816.
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