Enhanced reactive magnesia cement-based concrete mixes

Abstract

According to the present disclosure, a method of producing a hydrated magnesium carbonate based cement composite (HMCs) is provided. The method comprising providing an aqueous solution comprising a hydration agent and hydrated magnesium carbonate seed particles; contacting the aqueous solution with a magnesium oxide based cement to form magnesium hydroxide from the hydration agent and the magnesium oxide based cement, and on the hydrated magnesium carbonate seed particles; and exposing the magnesium hydroxide to carbon dioxide to form the hydrated magnesium carbonate based cement composite. The use of hydration agent and seed particles not not only increases formation of HMCs but also improves the mechanical performance of RMC based concrete formulations.

Description

[0001] Cross References to Related Applications

[0002] This application claims priority from Singapore Patent Application No. 10201700636V filed on 25 January 2017, the entire contents of which are incorporated herein by reference for all purposes. technical field

[0003] The present invention relates to a method for producing cement composites based on hydrated magnesium carbonate. The invention also relates to a cement composite based on hydrated magnesium carbonate. Background technique

[0004] Carbon dioxide (CO2) emitted from the combustion of fossil fuels 2 ) concentration is a major environmental problem. The Portland cement (PC) industry is considered a CO 2 One of the major contributors to increased emissions, as global PC production of more than 4 billion tons per year contributes 5% to 10% of global anthropogenic CO 2 emissions and a large amount of resource consumption. The amount of energy consumed by this process is about 2780 to 3050 terawatt hours p...

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