Robust SCC mixes through mix design

• Tipo: Artigo em Revista Científica Internacional
• Data: 2013

Autores

Sandra Nunes (Autor) FEUP; Paula Milheiro Oliveira (Autor) FEUP; Joana Sousa Coutinho (Autor) FEUP; Joaquim Figueiras (Autor) FEUP

Revista

Título: Journal of Materials in Civil Engineering

Vol. 25 Nº 2

Páginas: 183-193

ISSN: 0899-1561

Editora: ASCE

Indexação

ISI Web of Knowledge - 11 Citações

ISI Web of Science

Scopus - 17 Citações

COMPENDEX

INSPEC

Classificação Científica

FOS: Ciências da engenharia e tecnologias > Engenharia civil

CORDIS: Ciências Tecnológicas

Outras Informações

ID Authenticus: P-002-0N7

DOI: 10.1061/(asce)mt.1943-5533.0000592

Abstract (EN): One of the main obstacles to a wider use of self-compacting concrete (SCC) is its sensitivity to small variations of the constituent materials, mix proportions, and other external factors. The main objective of this paper is to illustrate how to evaluate and compare the robustness of SCC mixtures optimized according to various economic criteria while maintaining the water/cement ratio and fresh state target properties. The optimization is derived from numerical models, and a central composite design is developed to mathematically model the influence of mixture parameters and their coupled effects on deformability, passing and filling abilities, and compressive strength. The strategies to increase the robustness of SCC mixtures and the existing methodologies to assess it are presented and discussed. By applying these methodologies, it is shown that robustness can be enhanced by changing only the proportions of materials in mixtures. Minimizing the superplasticizer dosage and, consequently, increasing the paste volume (by means of a higher limestone filler content) to keep adequate fresh properties is found to be the most effective optimization criteria to enhance the robustness of SCC mixtures. DOI: 10.1061/(ASCE)MT.1943-5533.0000592. (C) 2013 American Society of Civil Engineers.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 11