Polymer mortar with sustained absorption function of carbon dioxide and preparation method therefor

A polymer mortar with a sustained carbon dioxide (CO2) absorption function, comprising the following raw materials in parts by mass:

• 500-800 parts of cement, 400-800 parts of quartz sand with a particle size of 10-20 mesh, 400-800 parts of quartz sand with a particle size of 20-40 mesh, 400-800 parts of quartz sand with a particle size of 40-70 mesh, 200-500 parts of quartz sand with a particle size of 70-100 mesh, 20-50 parts of silica fume, 10-30 parts of redispersible polymer powder, 1-5 parts of admixtures, and organic amine accounting for 1%-15% of a total mass of the raw materials, wherein
• the organic amine is a double-terminal primary amine containing siloxane bonds, an amino-terminated hydrosilicone intermediate is prepared by using 1,3-bis(3-aminopropyl)-1,1,3,3-tetramethyldisiloxane as an end-capping agent via a ring-opening reaction of 1,3,5,7-tetramethylcyclotetrasiloxane (D4H), and the organic amine is prepared by subjecting the intermediate to a hydrosilylation reaction with γ-methacryloxypropyltrimethoxysilane (KH570);
• and
• the admixture is one or more selected from water reducers, defoamers, and expansive agents.