Blasted copper slag as artificial fines in ecofriendly concrete

Materia

article

Felipe Alves de Oliveira¹  Cézar Augusto Casagrande²  Érika Pinto Marinho¹  Lidiane Fernanda Jochem²  Ana Cecília Vieira de Nóbrega¹ 

[1] Federal University of Pernambuco;Technological Federal University of Paraná

关键词: Absorption;    Concrete;    Durability;    BCS;    Strength;    Concrete ecofriendly;   

DOI  :  10.1590/S1517-707620220001.1338

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 present work assessed the feasibility of applying blasted copper slag (BCS) as addition to cementitious composites. Series with 0-15% of BCS were produced and characterized by compression strength, durability, spread and specific gravity. In fresh state, the workability was enhanced in until 250% when adding the slag. Besides, both mechanical strength and durability indicators of BCSR-added concrete were also improved. Although the greater strength at the ages of 7 and 28 days was achieved for the reference concrete, concretes containing 5% and 7.5% of BCSR also reached the expected resistance of 30 MPa at 28 days. Concretes containing 5% and 10% of the slag were the ones that less absorbed water. The reduction in capillary absorption reached 63% in comparison to the ref concrete for 5% BCS-modified concrete. The incorporation of BCS improved the performance of the reference concrete in terms of both mechanical strength and durability. So, the reuse of the BCS produced after abrasive blasting in concretes was viable and sustainable disposal alternative.

【 授权许可】

CC BY