Lightweight aggregates produced from sand sludge and zeolitic rocks

•Zeolitic rock improves the characteristics of lightweight aggregates.•Introduction of 20% zeolitic rock reduces the temperature required by 50°C.•Lightweight aggregates with the addition of zeolitic rocks have a total porosity of 60–70%. This paper reports the results of investigations on manufactu...

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Published in:Construction & building materials 2015-06, Vol.85, p.22-29
Main Authors: Volland, S., Brötz, J.
Format: Article
Language:English
Subjects:
Aggregates (Building materials)
Analysis
Building materials
Lightweight aggregates
Porous materials
Processing
Properties
Raw materials
Sand
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description •Zeolitic rock improves the characteristics of lightweight aggregates.•Introduction of 20% zeolitic rock reduces the temperature required by 50°C.•Lightweight aggregates with the addition of zeolitic rocks have a total porosity of 60–70%. This paper reports the results of investigations on manufacturing lightweight aggregates from sand sludge with zeolitic rocks added to decrease the foaming temperature. Sand sludge is a waste product from crushing and screening plants for sand and gravel production. Introduction of 20% zeolitic rock into the raw mix composition reduces the temperature required to produce lightweight aggregates by 50°C and improves their physical–mechanical characteristics. Lightweight aggregates using sand sludge with zeolitic rocks added have porous structures, with a total porosity of 60–70%; this material is recommended for use as lightweight aggregates for concrete and as heat-insulating filling.
doi_str_mv 10.1016/j.conbuildmat.2015.03.018
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subjects Aggregates (Building materials)
Analysis
Building materials
Lightweight aggregates
Porous materials
Processing
Properties
Raw materials
Sand
title Lightweight aggregates produced from sand sludge and zeolitic rocks
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