| 摘要 |
PURPOSE:To obtain a mold for FRP of easy forming, economy, high transferring and high strength, by utilizing a high strength cement and a mixture of a fiber and a synthetic resin as the main components. CONSTITUTION:A high strength cement with the compression strength higher than 1,000kgf/cm<2> is used. The main components consist of cement materials, ultrafine powder, high performance water-reducing agent and water. Single elements of alite, C3S, standard, premature strength, and white Poltland cements or their mixtures, or the mixed cement prepared from the high temperature furnace slag, flyash, etc. are used. The quantity of an ultrafine powder is preferable 40-5wt% against 60-95wt% of the cement material. The solid content of 1-5wt% against the cement material is used for the water-reducing agent consisting of naphthalenesulfonic acid, formaldehyde condensate salt and polycarboxylic acid salt, etc. Here, 10-30wt% of water against 100wt% of a mixture of the cement material and the ultrafine powder is desirably used. A thermohardening resin such as an unsaturated polyester, an epoxy, etc. for the synthetic resin and a hydrophobically treated glass fiber for the fiber are respectively used. |
