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riccus

260 Posts.

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01/08/16

18:32

Post #: 18419430
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Originally posted by guessy ↑

The research currently has been concentrated on the in situ growing of a fibre reinforced cementitious materials. It has been discovered that nano-SiO2, nano-Al2O3, nano-TiO2, nano-montmorillonites, etc, when added to concrete act as nuclei to form new types of needle-shaped cement hydration products. Needle-shaped hydrates act like fibres that will arrest the crack, so they are like in situ grown fibres that have a higher bonding strength in the matrix than the externally introduced to the mix fibres. It's been evaluated that the addition of nano-SiO2 increases the freeze-thaw resistance of concrete by over 80%. We are talking here about a nano-SiO2, which is not silica fume, as silica fume is only a micro-silica. The next stage could be growing in situ CNT within the concrete matrix, but this is obviously more difficult task that will not happen this decade. For more info on the above signalled developments please refer to: http://store.elsevier.com/Innovativ...nd-Structural-Engineering/isbn-9781782423263/

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do you read what you've typed? not many people are and when you're not even constructing proper sentences it doesn't help.

EDE Price at posting: 19.5¢ Sentiment: Buy Disclosure: Held
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