Visualization and quantification of aggregate and fiber in self-compacting concrete using computed tomography for wedge
- PDF / 3,082,101 Bytes
- 16 Pages / 595.276 x 790.866 pts Page_size
- 97 Downloads / 223 Views
(2020) 20:139
ORIGINAL ARTICLE
Visualization and quantification of aggregate and fiber in self‑compacting concrete using computed tomography for wedge splitting test B. Raja Rajeshwari1 · M. V. N. Sivakumar1 · P. Harsha Praneeth2 Received: 7 March 2020 / Revised: 26 September 2020 / Accepted: 14 October 2020 © Wroclaw University of Science and Technology 2020
Abstract Wedge splitting test gained popularity as a stable and simple method to predict the fracture mechanism properties of concrete specimens. The present research focuses on understanding the behavior of self-compacting concrete specimens made with and without steel fibers tested using wedge splitting test, later scanned under high resolution computed tomography. The contribution of hooked end steel fiber and coarse aggregates in fiber reinforced specimens was compared without steel fiber reinforced concrete specimens using high resolution computed tomography. As fracture takes place across the plane perpendicular to the splitting force, i.e. along the depth of specimens. High resolution computed tomography technique was adopted in visualizing the changes taking place across the matrix, coarse aggregate and steel fibers, along with the specimen’s depth. Datasets of the images, obtained from computed tomography, after images analysis and volume reconstruction, revealed a higher coarse aggregate and steel fiber participation in the failure region of without and with fibers specimens. Computed tomography investigation indicated a total of 23 coarse aggregate and 64 steel fibers participated in resisting the failure, during wedge splitting test of without and with fibers specimens. Therefore, high resolution computed tomography can be used in understanding, quantifying the participation of coarse aggregate and steel fiber in the failure plane, under fracture loads. Keywords Wedge splitting test · Computed tomography · Self-compacting concrete · Image analysis · Fracture mechanism
1 Introduction Dearth of free space for construction, led to a spike in land rate. To accommodate the spike in land rates, affordable for people in general, infrastructures projects are built vertically. A civil engineer needs to design such infrastructure projects, with a superior design that require structural members to be slender. In making the designing of such slender sections a reality, * B. Raja Rajeshwari [email protected] M. V. N. Sivakumar [email protected] P. Harsha Praneeth [email protected] 1
Department of Civil Engineering, National Institute of Technology Warangal, Warangal, Telangana 506004, India
Department of Civil Engineering, Geethanjali College of Engineering and Technology, Hyderabad, Telangana 501301, India
2
usage of superior engineering materials can’t be ignored. These slender sections are reinforced with more number of closely placed steel bars, and then concrete is forced to pass through these reinforcement. The limitation of conventional concrete to access such inaccessible areas without external vibrations is questionable, w
Data Loading...
