Chemical composition of mixed construction and demolition recycled aggregates from the State of Sao Paulo

被引：12

作者：

Ulsen, Carina ^{[1
,2
]}

Kahn, Henrique ^{[2
]}

Angulo, Sergio C. ^{[3
]}

John, Vanderley M. ^{[4
]}

机构：

[1] LCT EPUSP, Sao Paulo, Brazil

[2] Univ Sao Paulo, Escola Politecn, Depart Engn Minas & Petroleo, Sao Paulo, Brazil

[3] Inst Pesquisas Tecnol Estado Sao Paulo SA, Sao Paulo, Brazil

[4] Univ Sao Paulo, Escola Politecn, Depart Engn Construcao Civil, Sao Paulo, Brazil

来源：

REM-REVISTA ESCOLA DE MINAS | 2010年 / 63卷 / 02期

关键词：

Construction debris; technological characterization; recycling;

D O I：

10.1590/S0370-44672010000200019

中图分类号：

学科分类号：

摘要：

Construction and Demolition Waste (CDW) represents. about 50% of the total Brazilian municipal solid waste: thus, recycling represents huge benefits both in environmental and economic perspectives. Herein, the chemical characterization results of three samples from two different recycling plants from the State of Sao Paulo is prevented. The results demonstrated that the visual classification into grey and red is not related to the chemical composition but mostly to the grain size fraction. The chemical composition of the CDW varies according to the content of cement paste, natural aggregates (quartz sand or granite), red ceramic and clay. Furthermore, the production of recycled concrete aggregates requires two crushing stages to meet the technical standards. The sand fraction (below 4.8 mm) presents high grades of SiO2, which indicates the liberation of cement paste to fines (< 0.15 mm). The fines have a great potential to be used in the cement industry.

引用

页码：339 / 346

页数：8

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