scholarly journals Electrical Conductivity of Cementitious Composites Mixed with Carbon-Based Nanomaterials Used as a Construction Material

2020 ◽  
Vol 20 (6) ◽  
pp. 1-5
Author(s):  
Kwang-Mo Lim ◽  
Seong-Yeon Yun ◽  
Joo-Ha Lee
Keyword(s):  
Carbon Nanotube ◽  
Crack Detection ◽  
Construction Material ◽  
Microstructural Analysis ◽  
Construction Materials ◽  
Graphite Powder ◽  
Cementitious Composites ◽  
Single Walled Carbon Nanotube ◽  
Carbon Based Nanomaterials ◽  
Carbon Based

Carbon-based nanomaterials are used in various industrial fields because of their excellent performance. In construction, cementitious composites containing carbon-based materials have the potential to be used for various purposes such as crack detection and deicing. However, carbon-based materials have been experienced difficulties that cannot be easily dispersed in the cementitious composite because of the inherent material characteristic. This study aimed to investigate the possibility of using these carbon-based nanomaterials as construction materials. The structural and electrical performances of cementitious composites were investigated based on carbon-based materials such as Multi-Walled Carbon Nanotube (MWCNT), Single-Walled Carbon Nanotube (SWCNT), Graphene Nanoplatelets (GNP), Conductive Graphite Powder (CGP). In addition, the microstructural analysis was performed through the noncovalent functionalization of carbon-based nanomaterials to examine the dispersibility.

scholarly journals Fabrication of carbon nanotube-reinforced mortar specimens: evaluation of mechanical and pressure-sensitive properties

2018 ◽  
Vol 188 ◽  
pp. 01019 ◽  
Author(s):  
Evangelia K. Karaxi ◽  
Irene A. Kanellopoulou ◽  
Anna Karatza ◽  
Ioannis A. Kartsonakis ◽  
Costas A. Charitidis
Keyword(s):  
Cementitious Composites ◽  
Mixing Process ◽  
Mechanical And Electrical Properties ◽  
Pressure Sensitive ◽  
Polar Media ◽  
Significant Research ◽  
Multi Walled Carbon Nanotubes ◽  
Carbon Based Nanomaterials ◽  
Walled Carbon Nanotubes ◽  
Carbon Based

Carbon-based nanomaterials are promising reinforcing elements for the development of “smart” self-sensing cementitious composites due to their exceptional mechanical and electrical properties. Significant research efforts have been committed on the synthesis of cement-based composite materials reinforced with carbonaceous nanostructures, covering every aspect of the production process (type of nanomaterial, mixing process, electrode type, measurement methods etc.). In this study, the aim is to develop a well-defined repeatable procedure for the fabrication as well as the evaluation of pressure-sensitive properties of intrinsically self-sensing cementitious composites incorporating carbon- based nanomaterials. Highly functionalized multi-walled carbon nanotubes with increased dispersibility in polar media were used in the development of advanced reinforced mortar specimens which increased their mechanical properties and provided repeatable pressure-sensitive properties.

Nitrogen Reduction through Confined Electro-catalysis with Carbon Nanotube Inserted Metal Organic Frameworks

2021 ◽  
Author(s):  
Yang Lv ◽  
Yiqi Wang ◽  
Miao Yang ◽  
Zhangyan Mu ◽  
Shengtang Liu ◽  
...  
Keyword(s):  
Carbon Nanotube ◽  
Electrochemical Reduction ◽  
Low Cost ◽  
Metal Organic Frameworks ◽  
High Conductivity ◽  
Nitrogen Reduction ◽  
Electro Catalysis ◽  
Metal Organic ◽  
Carbon Based Nanomaterials ◽  
Carbon Based

Carbon-based nanomaterials are widely used in electro-catalysis because of their low cost, high conductivity and stability. However, their application towards selective electrochemical reduction of nitrogen to ammonia suffers from low...

scholarly journals Effect of Carbon Nanotube Size on Compressive Strengths of Nanotube Reinforced Cementitious Composites

2014 ◽  
Vol 2014 ◽  
pp. 1-8 ◽  
Author(s):  
Tanvir Manzur ◽  
Nur Yazdani ◽  
Md. Abul Bashar Emon
Keyword(s):  
Mechanical Properties ◽  
Carbon Nanotube ◽  
High Performance ◽  
Construction Material ◽  
High Potential ◽  
Cement Matrix ◽  
Cementitious Composites ◽  
Cement Composites ◽  
Nanoscale Science ◽  
20 Nm

Application of nanoscale science to construction material has already begun. In recent times, various nanofibers have raised the interest of researchers due to their exceptional mechanical properties and high potential to be used as reinforcement within cement matrix. Carbon nanotube (CNT) is one of the most important areas of research in the field of nanotechnology. The size and exceptional mechanical properties of CNT show their high potential to be used to produce high performance next generation cementitious composites. In this study, an attempt has been made to investigate the effect of size of CNTs on compressive strengths of CNT reinforced cement composites. Seven different sizes of multiwalled nanotubes (MWNTs) were used to produce MWNT-cement composites. A trend was observed regarding the effect of nanotube size on compressive strength of composites in most cases. MWNT with outside diameter (OD) of 20 nm or less exhibited relatively better performance. Smaller MWNT can be distributed at much finer scale and consequently filling the nanopore space within the cement matrix more efficiently. This in turn resulted in stronger composites.

scholarly journals Current Use of Carbon-Based Materials for Biomedical Applications—A Prospective and Review

Processes ◽  
2020 ◽  
Vol 8 (3) ◽  
pp. 355 ◽  
Author(s):  
Govindasamy Rajakumar ◽  
Xiu-Hua Zhang ◽  
Thandapani Gomathi ◽  
Sheng-Fu Wang ◽  
Mohammad Azam Ansari ◽  
...  
Keyword(s):  
Drug Delivery ◽  
Carbon Nanotube ◽  
Medical Devices ◽  
Biomedical Applications ◽  
Positive Outcomes ◽  
Graphene Oxides ◽  
Semiconducting Properties ◽  
Reduced Graphene ◽  
Carbon Based Nanomaterials ◽  
Carbon Based

Among a large number of current biomedical applications in the use of medical devices, carbon-based nanomaterials such as graphene (G), graphene oxides (GO), reduced graphene oxide (rGO), and carbon nanotube (CNT) are frontline materials that are suitable for developing medical devices. Carbon Based Nanomaterials (CBNs) are becoming promising materials due to the existence of both inorganic semiconducting properties and organic π-π stacking characteristics. Hence, it could effectively simultaneously interact with biomolecules and response to the light. By taking advantage of such aspects in a single entity, CBNs could be used for developing biomedical applications in the future. The recent studies in developing carbon-based nanomaterials and its applications in targeting drug delivery, cancer therapy, and biosensors. The development of conjugated and modified carbon-based nanomaterials contributes to positive outcomes in various therapies and achieved emerging challenges in preclinical biomedical applications. Subsequently, diverse biomedical applications of carbon nanotube were also deliberately discussed in the light of various therapeutic advantages.

Carbon nanotube (CNT) incorporated cementitious composites for functional construction materials: The state of the art

2019 ◽  
Vol 227 ◽  
pp. 111244 ◽  
Author(s):  
G.M. Kim ◽  
I.W. Nam ◽  
Beomjoo Yang ◽  
H.N. Yoon ◽  
H.K. Lee ◽  
...  
Keyword(s):  
Carbon Nanotube ◽  
State Of The Art ◽  
Construction Materials ◽  
The State ◽  
Cementitious Composites

scholarly journals Waste-Based One-Part Alkali Activated Materials

Materials ◽  
2021 ◽  
Vol 14 (11) ◽  
pp. 2911
Author(s):  
Margarida Gonçalves ◽  
Inês Silveirinha Vilarinho ◽  
Marinélia Capela ◽  
Ana Caetano ◽  
Rui Miguel Novais ◽  
...  
Keyword(s):  
Compressive Strength ◽  
Microstructural Analysis ◽  
Construction Materials ◽  
Sodium Metasilicate ◽  
High Compressive Strength ◽  
Hardened State ◽  
First Time ◽  
Furnace Slag ◽  
Alkali Activated

Ordinary Portland Cement is the most widely used binder in the construction sector; however, a very high carbon footprint is associated with its production process. Consequently, more sustainable alternative construction materials are being investigated, namely, one-part alkali activated materials (AAMs). In this work, waste-based one-part AAMs binders were developed using only a blast furnace slag, as the solid precursor, and sodium metasilicate, as the solid activator. For the first time, mortars in which the commercial sand was replaced by two exhausted sands from biomass boilers (CA and CT) were developed. Firstly, the characterization of the slag and sands (aggregates) was performed. After, the AAMs fresh and hardened state properties were evaluated, being the characterization complemented by FTIR and microstructural analysis. The binder and the mortars prepared with commercial sand presented high compressive strength values after 28 days of curing-56 MPa and 79 MPa, respectively. The mortars developed with exhausted sands exhibit outstanding compressive strength values, 86 and 70 MPa for CT and CA, respectively, and the other material’s properties were not affected. Consequently, this work proved that high compressive strength waste-based one-part AAMs mortars can be produced and that it is feasible to use another waste as aggregate in the mortar’s formulations: the exhausted sands from biomass boilers.

Sign in / Sign up

Export Citation Format

Share Document