The Influence of Heat and Mechanical Treatment of Concrete Rubble on the Properties of Recycled Aggregate Concrete
Concrete is a building material commonly used for ages. Therefore, in the result of repairs or demolition of building structures, large amounts of concrete rubble are created, which requires appropriate management. The aim of the realized research was to determine the influence of heat and mechanica...
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doaj-82e64d4585c246b683ecb46200ac206b2020-11-24T21:46:32ZengMDPI AGMaterials1996-19442019-01-0112336710.3390/ma12030367ma12030367The Influence of Heat and Mechanical Treatment of Concrete Rubble on the Properties of Recycled Aggregate ConcreteEdyta Pawluczuk0Katarzyna Kalinowska-Wichrowska1Michał Bołtryk2José Ramón Jiménez3José María Fernández4Faculty of Civil and Environmental Engineering, Bialystok University of Technology, 15-351 Białystok, PolandFaculty of Civil and Environmental Engineering, Bialystok University of Technology, 15-351 Białystok, PolandFaculty of Civil and Environmental Engineering, Bialystok University of Technology, 15-351 Białystok, PolandSchool of Engineering Sciences of Belmez, University of Córdoba, 14240 Belmez, SpainSchool of Engineering Sciences of Belmez, University of Córdoba, 14240 Belmez, SpainConcrete is a building material commonly used for ages. Therefore, in the result of repairs or demolition of building structures, large amounts of concrete rubble are created, which requires appropriate management. The aim of the realized research was to determine the influence of heat and mechanical treatment of concrete rubble on the properties of recycled aggregate concrete. The research experiment included 12 series, with three variables: X<sub>1</sub>—roasting temperature (300, 600, 900 °C), X<sub>2</sub>—time of mechanical treatment (5, 10, 15 min), X<sub>3</sub>—content of coarse recycled aggregates (20, 40, 60% by volume). Two additional series containing recycled aggregate without treatment and natural aggregate were also prepared. Established properties of individual aggregates have confirmed a positive effect of thermo-mechanical treatment. Then, based on the results of compressive strength, flexural strength, Young’s modulus, volumetric density, water absorption, water permeability and capillarity, the most favourable parameters of heat and mechanical treatment of concrete were determined. The test results showed that appropriate treatment of concrete rubble allows to obtain high-quality coarse aggregate and valuable fine fraction. This was also confirmed by the macro- and microscopic observations of the aggregate and separated cement paste. Works realized on the concrete recycling method resulted in obtaining a patent PAT.229887.https://www.mdpi.com/1996-1944/12/3/367recycled concrete aggregaterecycled aggregate concreteconcrete gravelthermo-mechanical treatmentmicrostructureX-ray diffraction |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Edyta Pawluczuk Katarzyna Kalinowska-Wichrowska Michał Bołtryk José Ramón Jiménez José María Fernández |
spellingShingle |
Edyta Pawluczuk Katarzyna Kalinowska-Wichrowska Michał Bołtryk José Ramón Jiménez José María Fernández The Influence of Heat and Mechanical Treatment of Concrete Rubble on the Properties of Recycled Aggregate Concrete Materials recycled concrete aggregate recycled aggregate concrete concrete gravel thermo-mechanical treatment microstructure X-ray diffraction |
author_facet |
Edyta Pawluczuk Katarzyna Kalinowska-Wichrowska Michał Bołtryk José Ramón Jiménez José María Fernández |
author_sort |
Edyta Pawluczuk |
title |
The Influence of Heat and Mechanical Treatment of Concrete Rubble on the Properties of Recycled Aggregate Concrete |
title_short |
The Influence of Heat and Mechanical Treatment of Concrete Rubble on the Properties of Recycled Aggregate Concrete |
title_full |
The Influence of Heat and Mechanical Treatment of Concrete Rubble on the Properties of Recycled Aggregate Concrete |
title_fullStr |
The Influence of Heat and Mechanical Treatment of Concrete Rubble on the Properties of Recycled Aggregate Concrete |
title_full_unstemmed |
The Influence of Heat and Mechanical Treatment of Concrete Rubble on the Properties of Recycled Aggregate Concrete |
title_sort |
influence of heat and mechanical treatment of concrete rubble on the properties of recycled aggregate concrete |
publisher |
MDPI AG |
series |
Materials |
issn |
1996-1944 |
publishDate |
2019-01-01 |
description |
Concrete is a building material commonly used for ages. Therefore, in the result of repairs or demolition of building structures, large amounts of concrete rubble are created, which requires appropriate management. The aim of the realized research was to determine the influence of heat and mechanical treatment of concrete rubble on the properties of recycled aggregate concrete. The research experiment included 12 series, with three variables: X<sub>1</sub>—roasting temperature (300, 600, 900 °C), X<sub>2</sub>—time of mechanical treatment (5, 10, 15 min), X<sub>3</sub>—content of coarse recycled aggregates (20, 40, 60% by volume). Two additional series containing recycled aggregate without treatment and natural aggregate were also prepared. Established properties of individual aggregates have confirmed a positive effect of thermo-mechanical treatment. Then, based on the results of compressive strength, flexural strength, Young’s modulus, volumetric density, water absorption, water permeability and capillarity, the most favourable parameters of heat and mechanical treatment of concrete were determined. The test results showed that appropriate treatment of concrete rubble allows to obtain high-quality coarse aggregate and valuable fine fraction. This was also confirmed by the macro- and microscopic observations of the aggregate and separated cement paste. Works realized on the concrete recycling method resulted in obtaining a patent PAT.229887. |
topic |
recycled concrete aggregate recycled aggregate concrete concrete gravel thermo-mechanical treatment microstructure X-ray diffraction |
url |
https://www.mdpi.com/1996-1944/12/3/367 |
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