Can reverse osmosis concentrate be used in the aerated concrete production process?
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The total ion concentration and mineralization level after reverse osmosis concentration are 4500 mg/L for ions in general, 800 mg/L for chloride ions, and 1200 mg/L for sulfate ions. Can this water quality be used for concrete production? I would appreciate the guidance from all the experts.
Concentrated saltwater can corrode the rebar in concrete. Environmental regulations require that this water be crystallized with zero emissions.
I wonder what effect so much salt has on the setting and strength of concrete? If it solidifies quickly, won’t the salt have less of an effect on corroding the rebar?
Firstly, the sodium and potassium present in concentrated brine can trigger alkali-aggregate reactions; although this may increase the early strength of concrete in the short term, it harms the durability or service life of the concrete. Secondly, chloride ions will corrode the passivation film on the surface of steel bars, leading to rapid rusting of these bars.
Some organizations use the concentrated brine produced as water for road dust suppression and cleaning, which over time causes pits and pitting in the concrete surfaces, as well as separation of cement from sand and gravel.
It’s no longer possible to do this; the rainwater discharge outlets of all enterprises are under constant online monitoring, and the soil within these enterprises is also tested every year. Spraying saline water indiscriminately will result in high costs for environmental remediation in the future