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2019 | Buch

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Nano-Engineered Cementitious Composites

Principles and Practices

verfasst von: Prof. Baoguo Han, Siqi Ding, Jialiang Wang, Prof. Jinping Ou

Verlag: Springer Singapore

Enthalten in: Springer Professional "Wirtschaft+Technik" , Springer Professional "Technik" , Springer Professional "Wirtschaft"

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Über dieses Buch

This book focuses on civil engineering materials and nanotechnology. Highlighting recent advances in the field of nano-engineered cementitious composites, it discusses their key principles, design and fabrication, testing and characterization, performance and mechanisms, as well as applications. Future developments and remaining challenges are also outlined.

Nano-engineered cementitious composites are exceptionally strong, durable and offer multifunctional/smart performance that differs considerably from that of normal cementitious composites. Providing valuable insights into these composites’ future development, the book offers an essential source of information, inspiration, theory and practical guidance for developing sustainable cementitious composites. As such, it will benefit researchers, scientists and engineers in the fields of civil engineering materials and nanotechnology alike.

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Inhaltsverzeichnis

Frontmatter

Chapter 1. Basic Principles of Nano-Engineered Cementitious Composites

Abstract

The cementitious composites are multi-component and multi-phase materials; thus they feature complex thermodynamics and kinetics as well as multi-scale and multi-equal characteristics according to the fundamental and the hierarchy of cementitious composites. The properties/performances of cementitious composites closely depend on their compositions and fabrication/processing as well as structures. Because the properties/performances of each scale derive from those of the next smaller scale, the nano science and technology provides a bottom-up approach for understanding and controlling the cementitious composites. The principles of nano-engineered cementitious composites can be attributed to the nano-core effect. The behaviors of the nano-engineered cementitious composites are governed by nano-core effect zone, i.e., nano-core-shell element.

Baoguo Han, Siqi Ding, Jialiang Wang, Jinping Ou

Chapter 2. Current Progress of Nano-Engineered Cementitious Composites

Abstract

The application of nano science and technology in cementitious composites is reported in the late 1980s and gets into an active period in nearly two decades. The different strategies including manufacturing nano-cement and mineral admixtures as well as incorporating nanomaterials have been proposed to develop nano-engineered cementitious composites. Thanks to the nanoscale-induced reinforcing/modifying mechanisms, the nano-engineered cementitious composites have the improved structures. Thus, they feature enhanced mechanical properties/performances and durability as well as unique multi-functional/smart properties/performances, which are closely relative to the compositions and fabrication/processing of nano-engineered cementitious composites.

Baoguo Han, Siqi Ding, Jialiang Wang, Jinping Ou

Chapter 3. Carbon Nanotubes-Engineered Cementitious Composites

Abstract

Carbon nanotubes (CNTs) with unique physical properties and morphology characteristics are incorporated into cementitious composites to reinforce/modify their properties/performances. The effects of type and content of multi-walled CNTs on the rheology, mechanical properties/performances, durability and functional/smart properties/performances of fresh and hardened cementitious composites are investigated. The enhancement/modification mechanisms are analyzed through X-ray diffraction, nuclear magnetic resonance, thermogravimetry and scanning electron microscope, and electrochemical impedance spectroscopy tests in combination with theoretical calculation. The feasibility of using self-sensing CNTs-engineered cementitious composites for traffic detection is also verified. Experimental results show that CNTs have an obvious impact on the properties/performances of cementitious composites due to their excellent mechanical/electrical/thermal properties, large aspect ratio, tubular structure, and low density, thus providing the opportunity to develop strong, durable, and smart/multi-functional infrastructures.

Baoguo Han, Siqi Ding, Jialiang Wang, Jinping Ou

Chapter 4. Graphene-Engineered Cementitious Composites

Abstract

Multi-layer graphenes with two-dimensional structure are added into cementitious composites to develop multifunctional/smart materials. The effects of graphene content on the rheology, mechanical properties/performances, durability, and functional/smart properties/performances of fresh and hardened cementitious composites are investigated. The underlying reinforcement/modification mechanisms are also analyzed through X-ray diffraction, nuclear magnetic resonance, thermogravimetry and scanning electron microscope, and electromagnetic parameter tests as well as theoretical calculation. Experimental results show that the incorporation of multi-layer graphenes makes obvious changes in the properties/performances of fresh and hardened cementitious composites due to their layer structure in combination with the essential characteristics of nano-carbon materials.

Baoguo Han, Siqi Ding, Jialiang Wang, Jinping Ou

Chapter 5. Nano-SiO2-Engineered Cementitious Composites

Abstract

Nano-SiO₂ particles with pozzolanic activity are introduced into different types of cementitious composites to reinforce/modify their properties/performances. The effects and their mechanisms of nano-SiO₂ on the rheology, mechanical properties/performances, and durability of cementitious composites are investigated through performance, thermogravimetry, X-ray diffraction, nuclear magnetic resonance, scanning electron microscope, and electrical resistivity tests. Experimental results show that the inclusion of nano-SiO₂ brings obvious impact on the properties/performances of fresh and hardened cementitious composites due to its pozzolanic activity in combination with small-size, nucleation, and filling effects.

Baoguo Han, Siqi Ding, Jialiang Wang, Jinping Ou

Chapter 6. Nano-TiO2-Engineered Cementitious Composites

Abstract

Nano-TiO₂ particles with high strength and hardness are incorporated into cementitious composites to reinforce/modify their properties/performances. The effects of type, content, and particle size as well as surface treatment of nano-TiO₂ on the mechanical properties/performances of cementitious composites are investigated. The enhancement mechanisms are analyzed through zeta potential, water vapor adsorption, contact angle, thermogravimetry, X-ray diffraction, nuclear magnetic resonance, and scanning electron microscope tests. The effects and modification mechanisms of nano-TiO₂ on the rheological, durability, and electrical properties/performances of cementitious composites are also studied. Experimental results indicate that all types of nano-TiO₂ present an obvious impact on the properties/performances cementitious composites because of their excellent mechanical characteristics and dispersibility in combination with nucleation and filling effects.

Baoguo Han, Siqi Ding, Jialiang Wang, Jinping Ou

Chapter 7. Nano-ZrO2-Engineered Cementitious Composites

Abstract

Nano-ZrO₂ particles with high strength and toughness are added into cementitious composites to reinforce/modify their properties/performances. The effects of the content of nano-ZrO₂ as well as curing method on the mechanical/electrical properties/performances and durability of cementitious composites are investigated. The enhancement mechanisms are analyzed through X-ray diffraction, nuclear magnetic resonance, thermogravimetry, and scanning electron microscope tests. Experimental results show that the nano-ZrO₂ significantly enhances the mechanical/electrical properties/performances and durability of cementitious composites due to its high strength and toughness in combination with small size and filling effects.

Baoguo Han, Siqi Ding, Jialiang Wang, Jinping Ou

Chapter 8. Nano-BN-Engineered Cementitious Composites

Abstract

Nano-BN with two-dimensional layered structure is incorporated into cementitious composites to reinforce/modify their properties/performances. The effects of the particle size and content of nano-BN as well as curing method on the mechanical properties/performances and durability of cementitious composites are investigated. The enhancement mechanisms are analyzed through performance, X-ray diffraction, nuclear magnetic resonance, thermogravimetry, and scanning electron microscope tests. Experimental results show that the 0.5% of 120 nm BN significantly enhances the mechanical properties/performances and durability of cementitious composites due to its small size, nucleation, filling, bridging, lubrication, and layered blocking effects.

Baoguo Han, Siqi Ding, Jialiang Wang, Jinping Ou

Chapter 9. Electrostatic Self-Assembled Carbon Nanotube/Nano-Carbon Black Fillers-Engineered Cementitious Composites

Abstract

Electrostatic self-assembled carbon nanotube/nano-carbon black fillers with grape bunch structure are added into cementitious composites to develop multi-functional/smart materials. The mechanical, electrically conductive, and self-sensing behaviors of electrostatic self-assembled fillers-engineered cementitious composites are investigated. The feasibility of using self-sensing electrostatic self-assembled fillers-engineered cementitious composites for in-situ monitoring of concrete columns is also verified. Experimental results show that because of their good dispersibility and cooperative modification effect, the electrostatic self-assembled fillers can effectively enhance electrical conductivity of the cementitious composites and endow stable and sensitive self-sensing capability to the cementitious composites at a low content of fillers. The electrostatic self-assembled fillers-engineered cementitious composites with self-sensing capability present potential for structural health monitoring of smart infrastructures.

Baoguo Han, Siqi Ding, Jialiang Wang, Jinping Ou

Chapter 10. Future Developments and Challenges of Nano-Engineered Cementitious Composites

Abstract

Nano science and technology shapes a great future from small things. The research and development of nano-engineered cementitious composites has produced a revolution in the field of cementitious composites toward sustainable infrastructures. Although the nano-engineered cementitious composites got rapid development in nearly 20 years, some critical challenges in design, fabrication/processing, test/characterization and simulation, properties/performances, mechanisms, and models, applications and potential risks of nano-engineered cementitious composites are needed to be addressed for promoting their large-scale applications.

Baoguo Han, Siqi Ding, Jialiang Wang, Jinping Ou

Titel: Nano-Engineered Cementitious Composites
verfasst von: Prof. Baoguo Han
Siqi Ding
Jialiang Wang
Prof. Jinping Ou
Copyright-Jahr: 2019
Verlag: Springer Singapore
Electronic ISBN: 978-981-13-7078-6
Print ISBN: 978-981-13-7077-9
DOI: https://doi.org/10.1007/978-981-13-7078-6