| 摘要 |
The disclosure relates to a fiber cement formulation, comprising: a cementitious hydraulic binder; cellulose fibers; and an air entrainment agent, said air entrainment agent comprises 0.1%-2% by weight, wherein the air entrainment agent is selected from the group consisting of salts of wood resin, synthetic detergents, salts of sulfonated lignin, salts of petroleum acids, salts of proteinaceous material, fatty and resinous acids and salts thereof, alkylbenzene sulfonates, salts of sulfonated hydrocarbons, wood resins, sulfonated hydrocarbons, and combinations thereof and/or the air entrainment agent comprises vinsol resin or a sacrificial filler. The disclosure also relates to a building article comprising multiple overlaying fiber cement substrate layers bonded to each other to form a fiber cement matrix, also having small and uniform entrained air pockets distributed throughout. The fiber cement substrate layers may comprise cellulose fibers. The disclosure also refers to a method of entraining air in a fiber cement panel. |
