Influence of silica fume and metakaolin on durability properties of hybrid fibers reinforced high strength concrete

The durability properties of hybrid fiber-reinforced high-strength concrete (HFRHSC) were examined in this research. Silica fume and metakaolin were added to both HFRHSC and conventional concrete specimens. Ramie fiber usage in concrete is a new trend and it gives good results compared to other type...

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Bibliographic Details
Published in:Journal of building pathology and rehabilitation 2023-06, Vol.8 (1), Article 21
Main Authors: Sriram, M., Sidhaarth, K. R. Aswin
Format: Article
Language:English
Subjects:
Advances on Building Pathology and Rehabilitation
Building Materials
Building Repair and Maintenance
Energy Efficiency
Engineering
Engineering Thermodynamics
Heat and Mass Transfer
Research Article
Structural Materials
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Summary:The durability properties of hybrid fiber-reinforced high-strength concrete (HFRHSC) were examined in this research. Silica fume and metakaolin were added to both HFRHSC and conventional concrete specimens. Ramie fiber usage in concrete is a new trend and it gives good results compared to other types of natural fibers. The optimum content of silica fume is 10% and metakaolin is 5% were used as cementitious composites in the hybrid fiber reinforced concrete (HFRC) mixes. A concrete mix of grade M 70 was used for this investigation. For developing HFRHSC, different proportions of ramie and steel fibers were mixed with cementitious composites. Ramie fiber fractions of 0.5%, 1%, 1.5%, and 2% were kept constant with varying fractions of hooked-end steel fibers of 17 different mixes were prepared. The durability properties of HFRHSC were determined by different tests such as water absorption, acid test, sorptivity test, drying test, sulphate test and marine attack test. The water absorption of HFRHSC was decreased by 4.5%, Sorptivity was decreased by 3.5%, Drying shrinkage was decreased by 3%, and the results of acid test of HFRHSC was decreased by 10%, Sulphate attack test of HFRHSC was decreased by 12% and marine attack test results 11% compared to the conventional concrete specimens. The hybrid fiber reinforced concrete specimens exhibits highly reduced absorption capacity than conventional concrete specimens. The effects of HFRHSC in acid tests shows less deteriorations compared to the conventional concrete specimens. Graphical abstract
ISSN:2365-3159
2365-3167
DOI:10.1007/s41024-023-00266-6