Abstract
The macroscopic aspects of adding basalt fiber (BF) to concrete has been the subject of studies that document great increases in compression strength. Research into the microscopic aspects of the reinforcement mechanism is still in an exploratory stage, and the quantitative analysis and visual observation of fibers in the concrete matrix are difficult. In this paper, the reinforcement effect of fiber on concrete is studied by means of computed tomography (CT) scanning technology and digital image processing (DIP) technology, combined with the macro-mechanical properties obtained from the unconfined compression strength test, and quantitative analysis from the micro point of view. At the same time, the fiber visualization is realized with the help of Avizo. The results show that with the increase in fiber dosage, the peak stress of concrete first increases and then decreases. When the fiber dosage is 3 kg/m3, the peak stress is 44.4 MPa, which is 41.85% higher than that of ordinary concrete. Additionally, the proportion of macropores is the least, which is the best fiber dosage. It is found that when the fiber dosage is 3 kg/m3, the angular distribution of φ is relatively uniform, and the uniform distribution of fibers forms a dense network structure, which significantly increases the peak stress of concrete. However, when the fiber dosage is too high, it will lead to the accumulation of fibers and produce macropores, and these excess fibers mainly appear in the horizontal direction and do not contribute to the compression strength.
Highlights
Concrete is the main building material for large-scale hydraulic structures, but concrete itself has defects such as poor ductility and brittleness, which seriously hinders its further development
In order to better understand the reinforcement mechanism of basalt fiber (BF) on concrete matrix, four kinds of concrete with different fiber dosage were selected in this paper
The unconfined compression test was used to obtain the peak stress corresponding to each dosage
Summary
Concrete is the main building material for large-scale hydraulic structures, but concrete itself has defects such as poor ductility and brittleness, which seriously hinders its further development. In the last 30 years, researchers have suggested many methods for improving the mechanical properties of concrete. Fiber has excellent mechanical properties and good durability. Fiber is often used as reinforcement, and is added to polymer composites and concrete materials. BF is a new type of inorganic fiber material. It takes the pure natural basalt ore as a raw material, breaks the ore and puts it into the tank kiln. The CT scanning experimental equipment is a Phoenix|tomex|s 3D computed tomography system from German GE Company, as shown, and the maximum voxel resolution is 0.3 μm. The maximum scanning voltage is 18 voxel resolution is 0.3 μm. The maximum scanning voltage mography system from German GE Company, as shown, and theismax power is
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
