Design of self-compacting high-performance concrete: Study of mortar phase

• Type: Article in International Scientific Journal
• Date: 2018

Authors

Ana Mafalda Matos (Author) Other; Lino Maia (Author) FEUP; Sandra Nunes (Author) FEUP; Paula Milheiro de Oliveira (Author) FEUP

Journal

Title: Construction and Building Materials

Vol. 167

Pages: 617-630

ISSN: 0950-0618

Publisher: Elsevier

Indexing

ISI Web of Knowledge - 18 Citations

Scopus - 19 Citations

INSPEC

Other information

Authenticus ID: P-00N-MB8

DOI: 10.1016/j.conbuildmat.2018.02.053

Abstract (EN): The design of self-compacting high-performance concrete (SCHPC) materials, to be applied in marine environments, demands for an adequate selection and combination of constituent materials. In the current study, a ternary mixture of white Portland cement + limestone filler + metakaolin was selected to produce a white SCHPC. Design of experiments approach was employed to investigate the effect of design variables, and their coupled effects, on the relevant mortar properties. Statistical models were developed to predict the fresh state properties, maximum temperature rise (under semi-adiabatic conditions), initial and final setting times and shrinkage deformation of mortars. Metakaolin to cement weight ratio was found to exhibit the highest effect (a negative effect) on workability and on initial/final setting time, which is explained by the high reactivity of metakaolin. The fine aggregate content had the highest effect on both the maximum temperature rise and shrinkage of mortars. Finally, the derived statistical models and a numerical optimization technique allowed finding the best combination of constituent materials to reduce the risk of cracking during the first days, which ensures a more impermeable concrete in the final structure.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 14