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DateDate: 20-06-2018, 06:36

This is the first successful experience in the production of concrete based on a five percent sodium activator.
Engineers from the University of Rice (USA) have created "green" concrete, which does not contain cement, but its strength is not inferior to the analog.
Fly ash is part of the ash produced during coal combustion, which rises together with the flue gases. It is very light and looks like dust. On its basis, American researchers have made environmentally friendly concrete.
Previous attempts to replace the astringent - portland cement - required expensive activators based on sodium. Its abundance offset the environmental benefits of the alternative. Therefore, scientists were looking for another recipe mixture.
Specialists from the University of Rice used the statistical method of Taguchi to determine the optimal composition of the substance. According to research participant Rouzbeh Shahsavari, this improved the structural properties of composites and led to the balance of fly ash, silicon dioxide, calcium oxide and a five percent sodium activator.
Here is how Shazavari himself commented on the work:
American scientists invented a device for extracting water in the desert
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"Most of the past research has focused on the so-called fly ash type F, which is derived from the burning of anthracite or bituminous coals - they contain little calcium, but there are sources of lower-grade coal such as lignite in the world. it is more difficult to activate it, our research allows to activate this type of ash efficiently and cheaply, which opens the way to environmentally friendly concrete, which is not inferior in strength to the usual. "