Graphical Abstract
Journal Paper-Published March 2022
Energy dissipation capacity of cementitious nanocomposite reinforced by hybrid carbon nanotubes
Abstract
Nanomaterials have a significant effect on the construction industry in terms of modifying concrete properties. However, accelerated microcracks due to brittle nature of cement paste cause low energy absorption in cement-based composites. Carbon nanotubes (CNTs) are promising materials to address this problem if not all. The main objective of this experimental investigation is to assess the effect of reinforcing cement-based composites with the low dosage of functionalized (COOH group) hybrid carbon nanotubes (single-walled and multi-walled carbon nanotubes). A Field Emission Electron Microscope (FESEM) was used to evaluate the morphology of the composite and CNTs’ bridging effect in the cement matrix. The results indicated the composite incorporating the 0.4 wt% Hybrid CNTs showed the highest increase in the energy absorption and improved the failure mechanism by decreasing the crack propagation and debris spatter.
Journal Of Construction and Building Materials
Table of Contents
Acknowledgments
How to Write a Technical Report
Fluid Properties
Fluid Statics-Pressure Measurement and Hydrostatics
Fluid Dynamics
Internal Flow
External Flow
References
Author Biography
Published Academic Book
Fluid Mechanics Experiments
Robabeh Jazaei, Slippery Rock University of Pennsylvania
ISBN: 9781681739267 | PDF ISBN: 9781681739274
Hardcover ISBN: 9781681739281
Copyright © 2020 | 118 Pages
DOI: 10.2200/S01033ED1V01Y202007MEC029
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https://www.morganclaypoolpublishers.com/catalog_Orig/product_info.php?products_id=1578
Abstract
Fluid mechanics is one of the most challenging undergraduate courses for engineering students. The fluid mechanics lab facilitates students’ learning in a hands-on environment. The primary objective of this book is to provide a graphical lab manual for the fluid mechanics laboratory.
The manual is divided into six chapters to cover the main topics of undergraduate-level fluid mechanics. Chapter 1 begins with an overview of laboratory objectives and the introduction of technical laboratory report content. In Chapter 1, error analysis is discussed by providing examples. In Chapter 2, fluid properties including viscosity, density, temperature, specific weight, and specific gravity are discussed.
Chapter 3 revolves around the fluid statics include pressure measurement using piezometers and manometers. Additionally, hydrostatic pressure on the submerged plane and curved surfaces as well as buoyancy and Archimedes’ Principle are examined in Chapter 3.
In Chapter 4, several core concepts of fluid dynamics are discussed. This chapter begins with defining a control system based on which momentum analysis of the flow system is explained. The rest of the chapter is allotted to the force acting on a control system, the linear momentum equation, and the energy equation. Chapter 4 also covers the hydraulic grade line and energy grade line experiment. The effect of orifice and changing cross-sectional area by using Bernoulli’s’ equation is presented in Chapter 4. The application of the siphon is extended from Chapter 4 by applying Bernoulli’s equation.
The last two chapters cover various topics in both internal and external flows which are of great importance in engineering design. Chapter 5 deals with internal flow including Reynolds number, flow classification, flow rate measurement, and velocity profile. The last experiment in Chapter 5 is devoted to a deep understanding of internal flow concepts in a piping system. In this experiment, students learn how to measure minor and major head losses as well as the impact of piping materials on the hydrodynamics behavior of the flow. Finally, open channels, weirs, specific energy, and flow classification, hydraulic jump, and sluice gate experiments are covered in Chapter 6.
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Table of Contents
Acknowledgments
How to Write a Technical Report
Fluid Properties
Fluid Statics-Pressure Measurement and Hydrostatics
Fluid Dynamics
Internal Flow
External Flow
References
Author Biography