"carbon black, any of a group of intensely black, finely divided forms of amorphous carbon, usually obtained as soot from partial combustion of hydrocarbons, used principally as reinforcing agents in automobile tires and other rubber products but also as extremely black pigments of high hiding power in printing ink, paint, and carbon paper."
https://www.britannica.com/science/carbon-black
"Carbon black particle diameters are less than 20 nm in some of furnace CB grads and up to few hundred nanometers in the thermal CB, whilst the carbon black aggregate dimensions fall in the range of 100 nm to a few micrometers."
Pigsty: "b) Carbon Nano Technology refers to any type of carbon fibre or particle under 100nm size.
The Mumbai winning bid will most likely be using (~5%) waste carbon black (WCB) combined with high dose fly ash. It provides all the properties needed at significantly lower cost than ordinary concrete."
Post #:64637478
Carbon black is not a nano material. It decreases the serviceability of the concrete it is added to.
You are the one cutting and pasting material you don't understand out of context and that actually proves what you are claiming is wrong and then tripping over yourself backtracking.
Projecting much?
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