Valorization of water treatment sludge waste by application as supplementary cementitious material

被引：63

作者：

Graupner de Godoy, Luis Gabriel ^{[1
]}

Rohden, Abrando Bernardo ^{[1
]}

Garcez, Monica Regina ^{[2
]}

da Costa, Eugenio Bastos ^{[3
]}

Da Dalt, Silvana ^{[4
]}

de Oliveira Andrade, Jairo Jose ^{[5
]}

机构：

[1] Univ Reg Blumenau, Postgrad Program Environm Engn, Blumenau, Brazil

[2] Univ Fed Rio Grande do Sul, Civil Engn Postgrad Program, Construct & Infrastruct, Km 92,RS 030,11-700, BR-95590000 Tramandai, RS, Brazil

[3] Fed Inst Alagoas, Coruripe Campus, Alagoas, Brazil

[4] Univ Fed Rio Grande do Sul, Interdisciplinary Dept Brazil, Porto Alegre, RS, Brazil

[5] Pontificia Univ Catolica Rio Grande do Sul, Postgrad Program Mat Engn & Technol, Porto Alegre, RS, Brazil

来源：

CONSTRUCTION AND BUILDING MATERIALS | 2019年 / 223卷

关键词：

Water treatment sludge; Pozzolanic activity; Supplementary cementitious materials; TREATMENT PLANT SLUDGE; POZZOLANIC PROPERTIES; FLASH CALCINATION; CALCINED CLAYS; GLASS-CERAMICS; KAOLINITE; CONCRETE; ASH;

D O I：

10.1016/j.conbuildmat.2019.07.333

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

This paper investigates the potential of using calcined water treatment sludge to the development of supplementary cementitious material. Sludge samples have been collected in the drying beds of a water treatment plant located in Southern Brazil and calcined in the laboratory. Chemical and mineralogical characterization has been performed through energy dispersive X-ray spectrometry, thermogravimetric analysis, and X-ray diffraction with crystalline phases quantified by Rietveld refinement. Morphological analysis has been supported by scanning electron microscope images. Physical characterization has been carried out through specific surface area, particle size distribution, and pozzolanic activity performance with Portland cement. Results have shown that the water treatment sludge is a non-hazardous and noninert waste without environmental restrictions for use in construction. Considering technical, environmental and economic aspects related to energy consumption, sludge samples calcined at 600 degrees C for 1 h present the most promising results regarding the production of supplementary cementitious material equivalent to a normal pozzolan, while highly active pozzolan requires 750 degrees C for 1 h. Calcined water treatment sludge showed great technical and environmental potential to be used as an alternative source of supplementary cementitious material in the near future. (C) 2019 Elsevier Ltd. All rights reserved.

引用

页码：939 / 950

页数：12

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