Impact crushing of concrete for liberation and recycling

Impact crushing of concrete for liberation and recycling

A test rig (large-scale pneumatic cannon) has been designed, constructed and tested. This apparatus allows the adjustment of intensive stressing conditions, e.g., impact and double impact, single and multiple stressing, velocity and energy. The accelerating tube diameter limit was given by the condi...

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Veröffentlicht in:Powder technology 1999-11, Vol.105 (1), p.39-51
Hauptverfasser: Tomas, Jürgen, Schreier, Matthias, Gröger, Torsten, Ehlers, Sabine
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Sprache:eng
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Impact crushing
Liberation
Multimodal distribution function
Particle compound material recycling
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container_issue 1
container_start_page 39
container_title Powder technology
container_volume 105
creator Tomas, Jürgen
Schreier, Matthias
Gröger, Torsten
Ehlers, Sabine
description A test rig (large-scale pneumatic cannon) has been designed, constructed and tested. This apparatus allows the adjustment of intensive stressing conditions, e.g., impact and double impact, single and multiple stressing, velocity and energy. The accelerating tube diameter limit was given by the condition of a representative feed sample (model concrete spheres 150 mm sample diameter limited by an upper particle size of aggregate d o=16 mm). The crushed fragments are described as subcollectives (truncated logarithmic normal distributions) of a multimodal distribution function. For impact stressing, liberation grades between 0.3 and 0.6 (0% adherent hardened cement paste) as well as more than 0.9 (0–50% adherent hardened cement paste) were obtained.
doi_str_mv 10.1016/S0032-5910(99)00116-3
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subjects Impact crushing
Liberation
Multimodal distribution function
Particle compound material recycling
title Impact crushing of concrete for liberation and recycling
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