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A platform for research: civil engineering, architecture and urbanism
Quality improvement of mixed and ceramic recycled aggregates by biodeposition of calcium carbonate
Graphical abstract
HighlightsThe biodeposition of CaCO3 on RMA was proposed to reduce their water absorption.Commercial recycled mixed aggregates obtained from recycling plants were tested.CaCO3 effect on water absorption, weight and consolidation of RMA was analysed.Characteristic appearance of precipitate from B. sphaericus was observed by SEM.Biodeposition had positive influence on RMA waterproofing.
AbstractThis research focuses on improving the quality of mixed and ceramic recycled aggregates by microbially induced carbonate precipitation (Bacillus sphaericus). The precipitation contributed to a weight increase and unleashed a waterproofing response. The roughness of the ceramic particles created a more uniform layer compared to natural or concrete particles. For the concrete fraction, which had a higher macroporosity, the consolidation effect was more pronounced. High ceramic content aggregates profited from a greater biodeposition, leading to a remaining amount of precipitates after sonication which was still greater than in cementitious materials. Pore-filling effect was detected by SEM, supporting the waterproofing result.
Quality improvement of mixed and ceramic recycled aggregates by biodeposition of calcium carbonate
Graphical abstract
HighlightsThe biodeposition of CaCO3 on RMA was proposed to reduce their water absorption.Commercial recycled mixed aggregates obtained from recycling plants were tested.CaCO3 effect on water absorption, weight and consolidation of RMA was analysed.Characteristic appearance of precipitate from B. sphaericus was observed by SEM.Biodeposition had positive influence on RMA waterproofing.
AbstractThis research focuses on improving the quality of mixed and ceramic recycled aggregates by microbially induced carbonate precipitation (Bacillus sphaericus). The precipitation contributed to a weight increase and unleashed a waterproofing response. The roughness of the ceramic particles created a more uniform layer compared to natural or concrete particles. For the concrete fraction, which had a higher macroporosity, the consolidation effect was more pronounced. High ceramic content aggregates profited from a greater biodeposition, leading to a remaining amount of precipitates after sonication which was still greater than in cementitious materials. Pore-filling effect was detected by SEM, supporting the waterproofing result.
Quality improvement of mixed and ceramic recycled aggregates by biodeposition of calcium carbonate
García-González, Julia (author) / Rodríguez-Robles, Desirée (author) / Wang, Jianyun (author) / De Belie, Nele (author) / Morán-del Pozo, Julia Mª (author) / Guerra-Romero, M. Ignacio (author) / Juan-Valdés, Andrés (author)
Construction and Building Materials ; 154 ; 1015-1023
2017-08-08
9 pages
Article (Journal)
Electronic Resource
English
Quality improvement of mixed and ceramic recycled aggregates by biodeposition of calcium carbonate
| Online Contents | 2017
Quality improvement of mixed and ceramic recycled aggregates by biodeposition of calcium carbonate
| British Library Online Contents | 2017
Quality improvement of mixed and ceramic recycled aggregates by biodeposition of calcium carbonate
| British Library Online Contents | 2017
Quality improvement of mixed and ceramic recycled aggregates by biodeposition of calcium carbonate
| British Library Online Contents | 2017
Quality improvement of mixed and ceramic recycled aggregates by biodeposition of calcium carbonate
| British Library Online Contents | 2017