Experimental investigation on effect of multi-walled carbon nanotubes concentration on flexural properties and microstructure of cement mortar composite

2017 ◽  
Author(s):  
Ali Yousefi ◽  
Norazura Muhamad Bunnori ◽  
Mehrnoush Khavarian ◽  
Omid Hassanshahi ◽  
Taksiah A. Majid
Keyword(s):  
Carbon Nanotubes ◽  
Experimental Investigation ◽  
Cement Mortar ◽  
Flexural Properties ◽  
Multi Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes

scholarly journals Metakaolin Based Geopolymer Mortar Reinforced with Multi-Walled Carbon Nanotubes - A Case Study

2020 ◽  
pp. 47-58
Author(s):  
Pawandeep Kaur ◽  
Jaspal Singh ◽  
Manpreet Kaur ◽  
Ritesh Jain
Keyword(s):  
Carbon Nanotubes ◽  
Compressive Strength ◽  
Sodium Hydroxide ◽  
Cement Mortar ◽  
Sodium Hydroxide Solution ◽  
Absolute Error ◽  
Transmission Electron ◽  
Multi Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes

Metakaolin based geopolymer mortars are presently considered as a feasible substitute to Ordinary Portland Cement mortar due to its various benefits. The present experimental investigation is planned by varying the concentrations of sodium hydroxide as 8M, 10M and 12M along with the variation of multi-walled carbon nanotubes (0, 0.25%, 0.50%, 0.75% and 1% by weight of the binder). For each specimen, the compressive strength was determined at the curing ages of 3, 7 and 28 days. The results clearly indicate that the incorporation of multi walled carbon nanotubes (MWCNTs) in the geopolymer matrixes enhances the compressive strength. Transmission electron microscope (TEM) was used to depict the microstructure and morphology of MWCNTs. The ultimate compressive strength was obtained by employing 12M concentrated sodium hydroxide solution along with 0.5% of MWCNTs in geopolymer mortar. The values of integral absolute error were computed for all the curing ages. All the values lie within the acceptable range (0 to 10%).

Dispersion of Carbon Nanotubes in Cement-Based Composites and Its Influence on the Piezoresistivities of Composites

2009 ◽  
Author(s):  
Baoguo Han ◽  
Xun Yu ◽  
Jinping Ou
Keyword(s):  
Carbon Nanotubes ◽  
Carbon Nanotube ◽  
Cement Mortar ◽  
Sodium Dodecyl ◽  
Impulsive Loading ◽  
Repeated Loading ◽  
Sodium Dodecylbenzene Sulfonate ◽  
Dodecylbenzene Sulfonate ◽  
Multi Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes

Sodium dodecyl sulfate (SDS) and sodium dodecylbenzene sulfonate (NaDDBS) are used as surfactants to improve the dispersion of multi-walled carbon nanotubes (MWNTs) in cement mortar and fabricate piezoresistive carbon-nanotube/cement mortar composite. The piezoresistivity of carbon-nanotube/cement mortar composite with different content levels of MWNTs and different surfactants were explored under repeated loading and impulsive loading. Experimental results indicate that NaDDBS has higher efficiency than SDS for the dispersion of MWNTs in cement mortar. The response of the electrical resistance of carbon-nanotube/cement mortar composite with NaDDBS to external force is more stable and sensitive than that of carbon-nanotube/cement mortar composite with SDS. These findings indicate that the use of NaDDBS is an effective way for improving the dispersion of MWNTs in cement-based composite and fabricating MWNTs filled cement-based composite with stable and strong piezoresistive response.

Nanoparticle/Epoxy Nanocomposites: Impact, Flexural and Thermal Properties

2010 ◽  
Vol 150-151 ◽  
pp. 1417-1420 ◽  
Author(s):  
Lei Chen ◽  
Zhi Wei Xu ◽  
Jia Lu Li ◽  
Guang Wei Chen
Keyword(s):  
Mechanical Properties ◽  
Carbon Nanotubes ◽  
Thermal Properties ◽  
Flexural Properties ◽  
Nano Tio2 ◽  
Nano Sio2 ◽  
Weight Content ◽  
Thermal Mechanical Properties ◽  
Multi Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes

Nanocomposites based on epoxy which were reinforced by different nanoparticles were fabricated. Five types of nanoparticles (corresponding to multi-walled carbon nanotubes (MWNTs), nano-Al2O3, nano-TiO2 and nano-SiO2) were chosen and the weight content of the nanoparticles was 2wt.%. Impact, flexural and thermal-mechanical properties of the nanocomposites were investigated. Compared with neat epoxy, impact strength of systems which were reinforced by MWNTs and nano-TiO2 was increased by 60%. Concerned with the flexural properties, there was also an increase of about 10%~50% with the addition of the some nanoparticles such as MWNTs, nano-TiO2 and nano-SiO2. The heat resistance of the EP was not decreased by adding nanoparticles and the thermal properties of the systems were even improved with the addition of MWNTs.

Piezoresistive Properties of Cement Mortar with Carbon Nanotube

2011 ◽  
Vol 284-286 ◽  
pp. 310-313
Author(s):  
Zhi Gang Liu ◽  
Li Rong Yang ◽  
Jun Cong Wei ◽  
Bao Hui Zhao ◽  
Xiao Xin Feng
Keyword(s):  
Carbon Nanotubes ◽  
Compressive Strength ◽  
Silica Fume ◽  
Electrical Resistance ◽  
Cement Mortar ◽  
Strength Development ◽  
Cement Mortars ◽  
Multi Walled Carbon Nanotubes ◽  
Compressive Strength Development ◽  
Walled Carbon Nanotubes

The compressive strength and piezoresistive property of cement mortar with low adding level of multi-walled carbon nanotubes (MWCNTs) were investigated. Experimental results showed that the compressive strength of the MWCNTs/cement mortars increased with the adding amount of MWCNTs content for all the curing ages. Silica fume promoted the compressive strength development by well bonding with MWCNTs and filling effect. The electrical resistance changed synchronously with the compressive strength and the amount of the changes varied with the stress and MWCNTs addition levels. Higher MWCNTs doping level improved the piezoresistive sensitivity of the mortar. The mortar with silica fume (5-10% by weight of cement) exhibited better piezoresistive response than that without silica fume at the same MWCNTs doping levels.

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