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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Comminution and sizing processes of concrete block waste as recycled aggregates

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Gomes, P. C. C. [1] ; Ulsen, C. [2] ; Pereira, F. A. [1] ; Quattrone, M. [3] ; Angulo, S. C. [3]
Total Authors: 5
[1] Univ Fed Alagoas, Ctr Technol, BR-57072970 Maceio, AL - Brazil
[2] Univ Sao Paulo, Escola Politecn, Dept Min & Petr Engn, BR-05508900 Sao Paulo - Brazil
[3] Univ Sao Paulo, Escola Politecn, Dept Construct Engn, BR-05508070 Sao Paulo - Brazil
Total Affiliations: 3
Document type: Journal article
Source: WASTE MANAGEMENT; v. 45, n. SI, p. 171-179, NOV 2015.
Web of Science Citations: 7

Due to the environmental impact of construction and demolition waste (CDW), recycling is mandatory. It is also important that recycled concrete aggregates (RCA) are used in concrete to meet market demands. In the literature, the influence of RCAs on concrete has been investigated, but very limited studies have been conducted on how the origin of concrete waste and comminution processes influence RCA characteristics. This paper aims to investigate the influence of three different comminution and sizing processes (simple screening, crushing and grinding) on the composition, shape and porosity characteristics of RCA obtained from concrete block waste. Crushing and grinding implies a reduction of RCA porosity. However, due to the presence of coarse quartz rounded river pebbles in the original concrete block mixtures, the shape characteristics deteriorated. A large amount of powder (<0.15 mm) without detectable anhydrous cement was also generated. (C) 2015 Elsevier Ltd. All rights reserved. (AU)

FAPESP's process: 12/15195-9 - Improving of recycled mixed CDW aggregates performance by means of thermal and coating treatments
Grantee:Marco Quattrone
Support type: Scholarships in Brazil - Post-Doctorate
FAPESP's process: 12/25496-6 - Strategies for eco-efficient dry-concrete formulation with recycled aggregates
Grantee:Sérgio Cirelli Angulo
Support type: Regular Research Grants