Fractal analysis of crack paths into innovative carbon-based cementitious composites

2017 ◽  
Vol 90 ◽  
pp. 133-141 ◽  
Author(s):  
L. Restuccia ◽  
A. Reggio ◽  
G.A. Ferro ◽  
R. Kamranirad
Keyword(s):  
Fractal Analysis ◽  
Cementitious Composites ◽  
Crack Paths ◽  
Carbon Based

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.

scholarly journals Effect of curing age on the self-sensing behavior of carbon-based engineered cementitious composites (ECC) under monotonic flexural loading scenario

2018 ◽  
Vol 162 ◽  
pp. 01034
Author(s):  
Ali Majeed Al-Dahawi
Keyword(s):  
Carbon Fibers ◽  
The Self ◽  
Cementitious Composites ◽  
Conductive Network ◽  
Engineered Cementitious Composites ◽  
Electrically Conductive ◽  
Conductive Material ◽  
Flexural Loading ◽  
Curing Age ◽  
Carbon Based

The potential effects of curing age on the self-sensing (piezoresistivity) capability of carbon-based Engineered Cementitious Composites (ECC) specimens are under focus in the present study. This non-structural feature can be regarded as one of the best solutions for continuously monitoring of infrastructures in terms of damage and deformations. Carbon fibers which are a micro-scale electrically conductive material were added to the ECC matrix and well dispersed to create the electrically conductive network. This network is responsible for sensing the applied loads on the prismatic specimens. The self-sensing behavior of electrically conductive prismatic specimens under four-point monotonic flexural loading was investigated and compared with dielectric ECC specimens at four ages of curing (7, 28, 90 and 180 days). The results showed that the developed multifunctional cementitious composites can sense the changes in the applied flexural stresses and the resultant mid-span deflection along the adopted curing ages with an improvement in the later ages.

MULTI-FUNCTIONAL CEMENTITIOUS COMPOSITES WITH SENSING AND HEALING CAPABILITIES

2017 ◽  
Vol 4 (1) ◽  
Author(s):  
Hocine Siad ◽  
Mohamed Lachemi ◽  
Mustafa Sahmaran ◽  
Anwar Hossain
Keyword(s):  
The Self ◽  
Beam Deflection ◽  
Cementitious Composites ◽  
Self Healing ◽  
Self Monitoring ◽  
Durability Properties ◽  
Moisture State ◽  
Compressive And Flexural Strengths ◽  
Mechanical Performances ◽  
Carbon Based

For smart concretes to be developed, it must be gathering high mechanical and durability properties, in addition to satisfying special characteristics such as self-monitoring of damage. This study outlines attempts to develop advanced Engineered Cementitious Composites (ECC) with combined self-sensing and self-healing capabilities. The aim is to maintain or improve the high mechanical and ductility properties of ECC, while enhancing the self-monitoring and self-healing capabilities. To assure the self-sensing functionality, carbon-based materials with different volumes were incorporated in ECC formulations. The self-healing rates of control and piezoresistive ECC’s were assessed by pre-cracking specimens up to 60% of their original flexure deformations and left those samples to heal under moist curing. The mechanical performances and ductility were evaluated based on compressive and flexural strengths, and mid-span beam deflection capacity measurements. The self-healing/self-sensing efficiency was tested by assessing the electrical resistivity (ER) variations of cylindrical specimens. Mechanical results of carbon-based ECC mixtures showed better or comparable performances than the corresponding control ECC. This study also reveals that the type of carbon-based materials and moisture state of specimens considerably influence the self-sensing/self-healing ability of ECC mixtures.

Fractal analysis of crack paths in Al2O3-TiC-4%Co composites

2006 ◽  
Vol 16 (4) ◽  
pp. 795-799 ◽  
Author(s):  
Jing LI ◽  
Yan-sheng YIN ◽  
Ying-cai LIU ◽  
Lai-peng MA
Keyword(s):  
Fractal Analysis ◽  
Crack Paths

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.

Electrical percolation threshold of cementitious composites possessing self-sensing functionality incorporating different carbon-based materials

2016 ◽  
Vol 25 (10) ◽  
pp. 105005 ◽  
Author(s):  
Ali Al-Dahawi ◽  
Mohammad Haroon Sarwary ◽  
Oğuzhan Öztürk ◽  
Gürkan Yıldırım ◽  
Arife Akın ◽  
...  
Keyword(s):  
Percolation Threshold ◽  
Cementitious Composites ◽  
Electrical Percolation ◽  
Electrical Percolation Threshold ◽  
Carbon Based

scholarly journals Investigation of the Mechanical, Microstructure and 3D Fractal Analysis of Nanocalcite-Modified Environmentally Friendly and Sustainable Cementitious Composites

Buildings ◽  
2022 ◽  
Vol 12 (1) ◽  
pp. 36
Author(s):  
Mahmoud Ziada ◽  
Yosra Tammam ◽  
Savaş Erdem ◽  
Roberto Alonso González Lezcano
Keyword(s):  
Mechanical Properties ◽  
Fractal Analysis ◽  
Design Theory ◽  
Environmentally Friendly ◽  
Material Design ◽  
Pulse Velocity ◽  
Cementitious Composites ◽  
Microstructural Properties ◽  
Engineered Cementitious Composites ◽  
Conventional Concrete

Unlike conventional concrete materials, Engineered Cementitious Composites (ECC) use a micromechanics-based design theory in the material design process. Recently, the use of nanoparticles in various concretes and mortars has increased. This study used nanocalcite to investigate the mechanical, microstructural fractal analysis of environmentally friendly nanocalcite-doped ECC (NCa-ECC). This paper investigated the effects of nanocalcite (NCa) with different contents (0.5, 1, and 1.5% by mass of binder) on the mechanical properties of engineered cementitious composites (ECC). For this purpose, compressive strength, ultrasonic pulse velocity (UPV), and flexural strength tests were conducted to investigate the mechanical properties of the ECC series. In addition, SEM analyses were carried out to investigate the microstructural properties of the ECC series. The content of nanocalcite improved the mechanical and microstructural properties of the nanocalcite-modified ECC series. In addition, the 1 NCa series (1% nanocalcite modified to the mass of the binder) had the best performance among the series used in this study.

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