Use of recycled aggregates in a method of making compositions to promote marine-life

Abstract

The present disclosure relates to methods that transform high salinity brine into a non-toxic, CO2-absorbing cementitious aggregate composition and a lower salinity water component which can each be recycled to the desalination facility, processed to produce fresh water, and/or added to a body of water without harming the local flora and fauna. The present disclosure provides methods comprising steps of: (a) combining (i) a high salinity brine, (ii) CO2, and (iii) a natural pozzolan, man-made pozzolan, latently hydraulic material, and/or recycled aggregate or carbonated recycled aggregate; and (b) permitting the combination of step (a) to persist under conditions sufficient to transform the combination into a cementitious aggregate composition and reduced salinity water. An activator, which may be any sodium, lithium or potassium salt or hydroxide and any alkali or alkali earth metal ions and including Mg(OH)2, MgO, Ca(OH)2, CaCO3, Al2(SO4)3, and/or CaO, can be added to the combination.

Dependencies are inferred from the claim text.