Analysis of Physical Properties of Coarse Aggregates Recovered from Demolished Concrete with a Two-Stage Water Jigs Process for Reuse as Aggregates in Concrete

被引:0
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作者
Teixeira, Artur Bressanelli [1 ]
Sampaio, Carlos Hoffmann [1 ]
Moncunill, Josep Oliva [1 ]
Palas, Jose Luis Cortina [2 ]
Lima, Monica Mariana Davila [1 ]
La Rosa, Grethel Tamara Herrera [1 ]
机构
[1] Univ Politecn Cataluna, Dept Engn Min Ind & TIC, Escola Politecn Super Engn Manresa, Ave Bases Manresa 61-63, Manresa 08242, Spain
[2] Campus Diagonal Besos, Dept Engn Quim, Edif 1,Eduard Maristany 16, Barcelona 08930, Spain
关键词
concrete; physical proprieties; aggregates; concentration; jigging process; WASTE RECYCLING PLANT; ECONOMIC VIABILITY ANALYSIS; DEMOLITION WASTE; ENVIRONMENTAL-ANALYSIS; CONSTRUCTION; PORTUGAL; CDW;
D O I
10.3390/buildings14072226
中图分类号
TU [建筑科学];
学科分类号
0813 ;
摘要
The present work analyses the physical characteristics of aggregates recovered with the waterjigging process from comminuted concrete. In this work, conventional concrete (C16/20) was crushed to a top size of 20 mm with a jaw crusher and classified in a size range of 5 to 20 mm. The densimetric distribution analysis was carried out in a densimetric range of 2.4 to 2.8 g/cm3, and the cement paste was dissolved from all granulometric ranges to analyze the composition (sand, cement paste, and aggregates) of each part and define the possibilities of materials to recover. A two-stage water jig concentration process was used, generating a cleaner material in the first stage and a re-cleaner material in the second jigging stage. The physical properties of the material inserted in the feed and the material generated in the first and second stages were analyzed to compare them with natural aggregates. The results indicate the viability of recovering 47.8% of the coarse aggregates present in the concrete feed in the re-cleaner material, with 84% of particles having a density higher than 2.6 g/cm3. These characteristics are similar to those found in natural aggregates.
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页数:17
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