Method of manufacturing environmentally friendly interior and exterior building materials using agricultural waste of lignocellulose-containing herbaceous plant and mineral binder and environmentally friendly interior and exterior building materials manufactured by the same

A method of manufacturing environmentally friendly interior and exterior building materials, the method comprising:

• preparing agricultural waste of a lignocellulose-containing herbaceous plant;
• subjecting the agricultural waste to immersion treatment using a functional immersion solution prepared by mixing purified water, an organic acid or an alkali salt thereof, and a composite natural extract and stirring the mixture;
• pulverizing the immersion-treated agricultural waste to prepare straw powder;
• mixing mineral powder, carbon fibers, and magnetic nanoparticles with a dispersion solution and stirring the mixture to prepare a first functional composite composition;
• mixing a metal peroxide, polyethylene glycol, and an additive and stirring the mixture to prepare a second functional composite composition;
• mixing purified water, the straw powder, the first functional composite composition, and mineral powder and stirring the mixture to prepare a base composition;
• mixing purified water, the base composition, the second functional composite composition, and a mineral activating solution and stirring the mixture to prepare a molding composition;
• and
• subjecting the molding composition to compression molding by a press-molding process using a mold,
• wherein the mineral powder includes at least one mineral of calcium, magnesium, manganese, iron, copper, phosphorus, zinc, sodium, potassium, and germanium, and
• the mineral activating solution is prepared by mixing a mineral liquid, an alkali salt, and deep ocean water.