A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
The invention is suitable for the technical field of concrete additives, and provides a polymer cement concrete additive, which is prepared from the following raw materials in parts by weight: 80 to 120 parts of ethylene-vinyl acetate copolymer, 30 to 50 parts of polyvinyl chloride resin, 15 to 35 parts of modified wollastonite powder, 20 to 40 parts of modified cellulose, 10 to 18 parts of inorganic nanoparticles, 2 to 6 parts of stabilizer, 2 to 6 parts of coupling agent and 140 to 180 parts of deionized water. The invention also provides a preparation method of the polymer cement concrete additive, cellulose is modified, the number of hydrophilic amino groups on the surface of the cellulose is increased, and the water retention capacity of the additive is improved; meanwhile, the wollastonite powder is modified through trifluoroethyl methacrylate, the binding force between the additive and the concrete surface is enhanced, the surface becomes more compact, evaporation of water on the concrete surface is effectively prevented through a compact curing film, and the water retention effect is improved.
本发明适用于混凝土添加剂技术领域，提供了一种高分子水泥混凝土添加剂，包括以下按照重量份的原料：乙烯‑醋酸乙烯共聚物80～120份、聚氯乙烯树脂30～50份、改性硅灰石粉15～35份、改性纤维素20～40份、无机纳米颗粒10～18份、稳定剂2～6份、偶联剂2～6份和去离子水140～180份。本发明还提供了一种如上所述的高分子水泥混凝土添加剂的制备方法，通过对纤维素进行改性处理，增加纤维素表面亲水性氨基数量，提高添加剂的保水性能；同时利用甲基丙烯酸三氟乙酯对硅灰石粉进行改性，增强了添加剂与混凝土表面的结合力，使表面变得更致密，致密的养护膜有效阻止了混凝土表面水分的蒸发，提高了保水效果。
The invention is suitable for the technical field of concrete additives, and provides a polymer cement concrete additive, which is prepared from the following raw materials in parts by weight: 80 to 120 parts of ethylene-vinyl acetate copolymer, 30 to 50 parts of polyvinyl chloride resin, 15 to 35 parts of modified wollastonite powder, 20 to 40 parts of modified cellulose, 10 to 18 parts of inorganic nanoparticles, 2 to 6 parts of stabilizer, 2 to 6 parts of coupling agent and 140 to 180 parts of deionized water. The invention also provides a preparation method of the polymer cement concrete additive, cellulose is modified, the number of hydrophilic amino groups on the surface of the cellulose is increased, and the water retention capacity of the additive is improved; meanwhile, the wollastonite powder is modified through trifluoroethyl methacrylate, the binding force between the additive and the concrete surface is enhanced, the surface becomes more compact, evaporation of water on the concrete surface is effectively prevented through a compact curing film, and the water retention effect is improved.
本发明适用于混凝土添加剂技术领域，提供了一种高分子水泥混凝土添加剂，包括以下按照重量份的原料：乙烯‑醋酸乙烯共聚物80～120份、聚氯乙烯树脂30～50份、改性硅灰石粉15～35份、改性纤维素20～40份、无机纳米颗粒10～18份、稳定剂2～6份、偶联剂2～6份和去离子水140～180份。本发明还提供了一种如上所述的高分子水泥混凝土添加剂的制备方法，通过对纤维素进行改性处理，增加纤维素表面亲水性氨基数量，提高添加剂的保水性能；同时利用甲基丙烯酸三氟乙酯对硅灰石粉进行改性，增强了添加剂与混凝土表面的结合力，使表面变得更致密，致密的养护膜有效阻止了混凝土表面水分的蒸发，提高了保水效果。
Polymer cement concrete additive and preparation method thereof
| European Patent Office | 2020
Reinforced polymer cement concrete and preparation method thereof
| European Patent Office | 2021