Recycling of sand sludge as a resource for lightweight aggregates

被引：30

作者：

Volland, S. ^{[1
]}

Kazmina, O. ^{[2
]}

Vereshchagin, V. ^{[2
]}

Dushkina, M. ^{[2
]}

机构：

[1] Tech Univ Darmstadt, Chair Bldg Mat Bldg Phys & Bldg Chem, Inst Concrete & Masonry Struct & Bldg Mat, Darmstadt, Germany

[2] Natl Res Tomsk Polytech Univ, Inst High Technol Phys, Dept Silicate & Nanomat Technol, Tomsk, Russia

来源：

CONSTRUCTION AND BUILDING MATERIALS | 2014年 / 52卷

关键词：

Lightweight aggregates; Building materials; Processing; Raw materials; Porous materials; SEWAGE-SLUDGE; BOTTOM ASH; CONCRETE;

D O I：

10.1016/j.conbuildmat.2013.10.088

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

This paper reports the results of investigations on manufacturing lightweight aggregate from sand sludge. Sand sludge is a waste product from crushing and screening plants for sand and gravel production. Preliminary studies demonstrate the feasibility of recycling sand sludge into lightweight aggregates. The properties of lightweight aggregates from sand sludge depend on both, the preliminary firing temperature of the frit and the foaming temperature of the green granules. Increasing the firing temperature of the fit from 800 to 900 degrees C, the compressive strength, and the bulk and relative density of the granulated foam material decrease on the average by a factor of two, the water absorption decreases by 1%. The lightweight aggregates, derived from sand sludge at a temperature of 950 degrees C, have a bulk density of 330 kg/m(3), a compressive strength of 0.18 MPa and a water absorption of 0.1%. (C) 2013 Elsevier Ltd. All rights reserved.

引用

页码：361 / 365

页数：5

共 22 条

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