Method for inserting carbon nanofillers into an inorganic curable system
A technology of nanofillers and carbon nanotubes, which can be used in the field of solidifying inorganic systems such as cement, stucco, enhancing mechanical properties and improving such systems, ceramics or liquid silicates, and can solve problems such as difficult implementation and lengthy dispersion process
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Embodiment 1
[0101] Embodiment 1 (comparison) : Introduction of CNTs in Portland cement-based concrete starting from CNT powder
[0102] A 0.025% by weight solution of the superplasticizer Superplast C-3 in water was prepared. CNT (from Arkema C100) was introduced into the solution for 30 minutes to obtain a CNT concentration of 0.01% by weight.
[0103] The dispersion was treated by hydrodynamic cavitation using a VGT-2.2 apparatus manufactured by VGT Servise, Izhevsk, Russia. Using 2.2 kW of energy, the treatment time was 1 hour and 40 minutes per liter of dispersion. The quality of the dispersion was monitored by light microscopy to confirm the absence of aggregates larger than 1 μm.
[0104] Starting from CEM type I cement of index 42.5 mixed with quartz sand in a 1:3 weight ratio, the CNT dispersion was used for the preparation of the concrete. Starting from the amount of cement, the amount of CNT dispersion used to provide a CNT percentage of 0.006% relative to the amount of c...
Embodiment 2
[0109] Example 2 :Depend on CW2-45 masterbatch begins to introduce CNTs in Portland cement-based concrete
[0110] A 0.01% by weight solution of the superplasticizer Superplast C-3 in water was prepared. By using a low speed mechanical mixer (500 rpm), by adding CW2-45 (CNT / carboxymethylcellulose 45 / 55) introduces CNTs into the solution to obtain a CNT concentration of 0.01% by weight.
[0111] The dispersion was treated by hydrodynamic cavitation using a VGT-2.2 apparatus manufactured by VGT Servise, Izhevsk, Russia. Using 2.2 kW of energy, the treatment time for one liter of dispersion was 1 hour and 40 minutes. The quality of the dispersion was monitored by light microscopy to confirm the absence of aggregates larger than 1 μm.
[0112] The CNT dispersion was used for the preparation of concrete as in Example 1 to provide a CNT percentage of 0.006% relative to the amount of cement and a water / cement ratio of 0.5.
[0113] In the same manner as in Example 1, concret...
Embodiment 3
[0116] Example 3 : Starting from CNT powder and nano silica in powder form, introduction of CNT and nano silica in Portland cement based concrete
[0117]Implement the same procedure as in Example 1 to prepare Superplast C-3 containing 0.01% superplasticizer and 0.01% Dispersion of C100CNT in water. Nanosilica was also introduced at a concentration of 0.03% in the form of a powder with an average size of 350 μm. The treatment time by hydrodynamic cavitation for one liter of CNT and nanosilica dispersion in a VTG-2.2 cavitator was 10 minutes with 2.2 kW energy.
[0118] The quality of the dispersion was monitored by light microscopy to confirm the absence of aggregates larger than 1 μm.
[0119] The CNT dispersion was used for the preparation of concrete as in Example 1 to provide a CNT content of 0.006% and a nano-silica content of 0.03% relative to the amount of cement, and a water / cement ratio of 0.5.
[0120] In the same manner as in Example 1, concrete samples were p...
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