Utilização de lodo tratado de indústria de produtos de limpeza em matrizes cimentícias

Materia

article

José Daniel Jales Silva¹  María del Pilar Durante Ingunza¹  Liana Filgueira Albuquerque²  Paulo Alysson Brilhante Faheina Souza¹  Luiza Gabriela Galvão de Medeiros³ 

[1] Universidade Federal do Rio Grande do Norte;Universidade Federal da Paraíba;Universidade Federal Rural do Semi-Árido

关键词: Concrete;    Industrial Sludge;    Sustainability;   

DOI  :  10.1590/S1517-707620210003.13040

学科分类：工程和技术（综合）

来源: Universidade Federal do Rio de Janeiro * Coordenacao dos Programas de Pos-Graduacao de Engenharia

【 摘 要 】

The generation of industrial waste has increased continuously encouraging studies about a sustainable and environmentally correct destination to it. As an example, there are the waste generated in cleaning product factories. Aiming to evaluate the incorporation potential of a sludge from an industry of this sector as filler for conventional concretes production, different sludge content was added (5, 10, 15, 20%) in a proportion 1:2:3 (cement:sand:gravel). The mechanical and durability properties of these concretes were evaluated in the fresh and hardened states. All concretes produced with residue showed an increase of workability attributed to the possible presence of surfactants in the composition of effluents. However, compressive strengths lower than the reference concrete were obtained with evidence of an increase in the porosity of the transition zone and greater formation of the compound ettringite in microstructure. For maximum addition content, the reduction in resistance was about 39%. The water absorption and void ratio have slightly increased for all the mixtures, except concrete with 20% sludge. The addition of the residue in the cementitious matrix caused a reduction in durability. As a final evaluation, the maximum addition content recommended is 20%, constituting a significant proportion for waste disposal, however, the produced concretes cannot be used for structural purposes.

【 授权许可】

CC BY