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Preparation of Aligned Steel Fiber Reinforced Cementitious Composite and Its Flexural Behavior
Published on: June 27, 2018
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Mix Proportion Design of Self-Compacting SFRC with Manufactured Sand Based on the Steel Fiber Aggregate Skeleton
Xinxin Ding1,2, Minglei Zhao3, Jie Li3
1International Joint Research Lab for Eco-building Materials and Engineering of Henan, North China University of Water Resources and Electric Power, Zhengzhou 450045, China.
Materials (Basel, Switzerland)
|July 1, 2020
Summary
A new mix design method for self-compacting steel-fiber-reinforced concrete (SFRC) was developed. This method optimizes binder content and sand ratios, improving the performance of SFRC using manufactured sand.
Area of Science:
- Civil Engineering
- Materials Science
Background:
- Self-compacting steel-fiber-reinforced concrete (SFRC) requires efficient mix design methods for engineering applications.
- Steel fibers significantly influence SFRC mix proportions and aggregate skeleton packing.
Purpose of the Study:
- To develop a scientific and concise mix design method for self-compacting SFRC.
- To investigate the effects of steel fibers on the packing properties of the aggregate skeleton.
Main Methods:
- Conducted 252 packing tests varying coarse aggregate size, manufactured sand ratios (50-62%), steel fiber types, and volume fractions (0-2.0%).
- Utilized the absolute volume design method and water-to-binder ratio calculations.
- Verified the proposed design method with eight SFRC mixtures, testing workability, air content, density, and strength.
Main Results:
- Void content and rational sand ratio of the steel fiber aggregate skeleton increased linearly with the fiber factor.
- The study established a basis for calculating binder content and rational sand ratio in self-compacting SFRC.
- Manufactured sand can be used as a complete replacement for natural sand in self-compacting SFRC.
Conclusions:
- A systematic procedure for self-compacting SFRC mix design was proposed and validated.
- The developed method is adaptable and practical for achieving desired SFRC properties.
- The findings support the use of manufactured sand in self-compacting SFRC applications.
Keywords:
manufactured sand ratiomix design methodself-compacting SFRCsteel fiber aggregate skeletonverification testvoid contentMore Related Videos
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