Physical, chemical and mineralogical properties of fine recycled aggregates made from concrete waste

被引：217

作者：

Evangelista, L. ^{[1
,5
]}

Guedes, M. ^{[2
,6
]}

de Brito, J. ^{[3
,5
]}

Ferro, A. C. ^{[4
,6
]}

Pereira, M. F. ^{[3
,7
]}

机构：

[1] Inst Super Engn Lisboa, Dept Civil Engn, P-1959007 Lisbon, Portugal

[2] Escola Super Tecnol Setubal, Dept Mech Engn, P-2910761 Setubal, Portugal

[3] Univ Lisbon, Inst Super Tecn, Dept Civil Engn Architecture & Georresources, P-1049001 Lisbon, Portugal

[4] Univ Lisbon, Inst Super Tecn, Dept Mech Engn, P-1049001 Lisbon, Portugal

[5] CERis ICIST Inst Engn Estruturas Terr & Construca, P-1049001 Lisbon, Portugal

[6] Inst Super Tecn, ICEMS Inst Mat & Surface Sci & Engn, P-1049001 Lisbon, Portugal

[7] Inst Super Tecn, CEPGIST Ctr Petr & Geochem, P-1049001 Lisbon, Portugal

来源：

CONSTRUCTION AND BUILDING MATERIALS | 2015年 / 86卷

关键词：

Source concrete; Fine recycled aggregates; Water absorption kinetics; Particle size; Particle distribution; Microstructure; DEMOLITION WASTE; ENVIRONMENTAL-ANALYSIS; CONSTRUCTION; EXTRACTION; IMPACT; SAND; PORTUGAL; MORTARS; CEMENT; PLANT;

D O I：

10.1016/j.conbuildmat.2015.03.112

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

This paper assesses the physical, chemical and mineralogical characteristics of fine recycled aggregates obtained from crushed concrete waste, comparing them with two types of natural fine aggregates from different origins. A commercial concrete was jaw crushed, and the effect of different aperture sizes on the particle size distribution of the resulting aggregates was evaluated. The density and water absorption of the recycled aggregates was determined and a model for predicting water absorption over time is proposed. Both natural and recycled aggregates were characterized regarding bulk density and fines content. Recycled aggregates were additionally characterized by XRD, SEM/EDS and DTA/TG of individual size fractions. The results show that natural and recycled fine aggregates have very different characteristics. This should be considered in potential applications, both in terms of the limits for replacing amounts and of the rules and design criteria of the manufactured products. (C) 2015 Elsevier Ltd. All rights reserved.

引用

页码：178 / 188

页数：11

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