| abstract |
The invention relates to the field of concrete admixtures, and discloses an amphoteric polycarboxylate water reducer and a synthesis method thereof. In parts by weight, the amphoteric polycarboxylate water reducer comprises 240-300 parts of polyether monomers, no 15-20 parts of saturated acid, 5-8 parts of self-made amphoteric functional monomer, 0.3-0.5 parts of reducing agent, 1-2 parts of hydrogen peroxide, 0.9-1.2 parts of molecular weight regulator, 0.006-0.008 parts of metal accelerator, 180-240 parts of water share. Synthesized by free radical polymerization at room temperature, the present invention has short reaction time, energy saving and environmental protection, and at the same time, because the molecular structure of the amphoteric polycarboxylate water reducer contains amphoteric functional monomers, it has the function of reducing viscosity in concrete; The cationic group can resist bacterial adhesion, prevent the formation of biofilm, inhibit bacterial reproduction, and make it antibacterial. The amphoteric polycarboxylate water reducing agent synthesized by the invention has high water reducing rate, good slump retention performance and can improve early strength. |