Recycling of sand sludge as a resource for lightweight aggregates

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 aggreg...

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Bibliographic Details
Published in:Construction & building materials 2014-02, Vol.52, p.361-365
Main Authors: Volland, S., Kazmina, O., Vereshchagin, V., Dushkina, M.
Format: Article
Language:English
Subjects:
Analysis
Building materials
Lightweight aggregates
Lightweight concrete
Mechanical properties
Porous materials
Processing
Properties
Raw materials
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Summary: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 frit from 800 to 900°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°С, have a bulk density of 330kg/m3, a compressive strength of 0.18MPa and a water absorption of 0.1%.
ISSN:0950-0618
DOI:10.1016/j.conbuildmat.2013.10.088