| 摘要 |
The present invention provides a concrete composition including, based on 100 parts by weight of cement: 10 to 40 parts by weight of a mixture consisting of 10 to 90 weight% of a hemp solution in least one form of a powder, a concentrate and an extract and 10 to 90 weight% of a hemp stem having a length of 0.5 mm to 5 cm; 10 to 30 parts by weight of a foaming particle; 5 to 15 parts by weight of a flame retardant including liquefied ammonium pyrophosphoric acid as a flame retardant supplement; 10 to 25 parts by weight of a binder; and 0.01 to 10 parts by weight of a high efficiency water reducing agent, which includes 80 to 95 weight% of naphthalene water reducing agent and 5 to 20 weight% of a polycarboxylic acid high efficiency water reducing agent, to make an amount of air in a range of 4 volume% to 6 volume% in a concrete, wherein 1 to 15 parts by weight of a viscosity modifier selected from the group consisting of trimethane ester, benzoic acid ester, ethylcyclohexane, 2,2,4-trimethyl-1,3,-petanedioldibutyrate and a filling agent selected from the group consisting of a silica, an acryl powder and quartz based on 100 parts by weight of the cement are further included. The building interior material composition according to the present invention improves durability and adds sound-absorbing power, antibacteral power, deodorization, insect repellent property, heat insulation, and ultraviolet ray blocking property while emitting far-infrared radiation, removing harmful waves and easily manipulating moisture by using a bio-friendly hemp which may be obtained from nature. |
