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Characterization and Use of Construction and Demolition Waste from South of Brazil in the Production of Foamed Concrete Blocks
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Characterization and Use of Construction and Demolition Waste from South of Brazil in the Production of Foamed Concrete Blocks
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Journal Article
Characterization and Use of Construction and Demolition Waste from South of Brazil in the Production of Foamed Concrete Blocks
2017
Overview
The main objective of this study was to evaluate the use of construction and demolition waste (CDW) from the Passo Fundo region of Rio Grande do Sul (RS), Brazil, in the development of aerated foamed concrete. This waste had not yet been characterized or even reused. CDW was processed (sieved only), characterized, and used as an aggregate, completely substituting natural sand. The influence of CDW granulometry and the amount of foam upon compressive strength, wet and dry bulk density, water absorption, and the air voids of concrete blocks were determined. Results showed that CDW has regular characteristics for the development of aerated foamed concrete. Compressive strength and density decreased as the amount of foam increased, while water absorption and air voids also increased. Also, CDW that was classified as coarse showed higher compressive strength. On average, CDW medium-sized particles had a higher air void content, while water absorption showed little variation with respect to granulometry. CDW residue from the region of study can be used as aggregate for the development of aerated foamed concrete. However, it must characterized before being used to guarantee the quality of the final product.
Publisher
MDPI AG
