Application of DEM model to breakage and liberation behaviour of recycled aggregates from impact-breakage of concrete waste

被引：22

作者：

Lee, Hoon ^{[1
]}

Kwon, Ji Hoe ^{[1
]}

Kim, Kwan Ho ^{[1
]}

Cho, Hee Chan ^{[1
]}

机构：

[1] Seoul Natl Univ, Seoul 135502, South Korea

来源：

MINERALS ENGINEERING | 2008年 / 21卷 / 11期

关键词：

Discrete element modelling; Recycled aggregate; Liberation;

D O I：

10.1016/j.mineng.2008.06.007

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

For the recovery of aggregates from construction waste, the principle process is a separation of aggregates by breakage from the cement paste. In this study, a model based on DEM (discrete element method) was used to simulate the breakage behaviour of a block of concrete waste in repeated free fall tests. With 3D DEM model, 73 mm x 53 mm Concrete block was modelled with macro-particles formed by a group of 970 spherical sub-particles and the sample block free fell 30 times from a 2 m height. The results of simulation were used to analyze the breakage characteristics of bonds between particles according to the number of free fall impacts. And, liberation ratio showed that high-quality recycled aggregates from concrete waste can be produced. (C) 2008 Elsevier Ltd. All rights reserved.

引用

页码：761 / 765

页数：5

共 11 条

[1]

Ahn J.W., 2001, GEOSYSTEM ENG, V4, P123

[2] Breakage behaviour of spherical granulates by compression [J].