Plain Concrete Research Papers - Academia.edu (original) (raw)
It was shown by the authors [3], [4], how the powerful numerical techniques such as Finite Element Method (FEM) and Boundary Element Method (BEM) could be applied to solve some problems of the Linear Elastic Fracture Mechanics (LEFM). The... more
It was shown by the authors [3], [4], how the powerful numerical techniques such as Finite Element Method (FEM) and Boundary Element Method (BEM) could be applied to solve some problems of the Linear Elastic Fracture Mechanics (LEFM). The structural material considered was presumed ideally brittle, such as ceramic or glass. A small inelastic process zone in front of the crack tip was also included in the solution, using the idea of the first and second Irwin’s corrections.
In this study, jute fiber was used as fibrous material in concrete to improve the overall strength. Jute fiber of different lengths and percentages were selected. Three percentages of jute fibers were implemented here, such as 0.1%, 0.25%... more
In this study, jute fiber was used as fibrous material in concrete to improve the overall strength. Jute fiber of different lengths and percentages were selected. Three percentages of jute fibers were implemented here, such as 0.1%, 0.25% and 0.5% of the volume of plain concrete. Again, three lengths of jute fiber were selected such as 10 mm, 15 mm and 20 mm for each percentage to find out the best potential percentage along with length. All these were done to compare the compressive strength and split tensile strength of jute fiber reinforce concrete (JFRC) with plain concrete to find out the best results. Total 30 numbers of cube were prepared for compressive strength tests and 30 numbers of cylinder for split tensile strength tests. They were loaded in 7, 14 and 28 days respectively and the strengths were noted and compared with each other. The cube has shown maximum improvement over compressive strength for 0.25% jute fiber of 10 mm length. The compressive strength was increased by 22.51%, 29.56% and 26.15% for 7, 14, and 28 days respectively compared to plain concrete. The cylinder also has shown maximum enhancement over split tensile strength for 0.25% jute fiber of 10 mm length. The split tensile strength was increased by 14.09%, 26.23% and 25.48% for 7, 14, and 28 days respectively compared to plain concrete. Here, the improvement was little for 0.1% jute fiber compared to 0.25%. However, the strengths has been dramatically reduced for 0.5%.
- by Sajedur Rahman and +1
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- Concrete, Compressive Strength, Plain Concrete, Jute Fiber
A Visual Basic for Application’s program for calculating crack growth in concrete and reinforced concrete beams is presented in this paper. This program is useful for obtaining quick results for initial analysis and parametric study. In... more
A Visual Basic for Application’s program for calculating crack growth in concrete and reinforced concrete beams is presented in this paper. This program is useful for obtaining quick results for initial analysis and parametric study. In the present program Nielsen’s crack growth formula is incorporated which is a new and original effective crack model. Some results are presented and comparisons with experiments are performed.