High-performance cement grinding aid containing waste vegetable oil and preparation and application method thereof

The invention relates to a high-performance cement grinding aid containing waste vegetable oil and a preparation and application method thereof. The cement grinding aid comprises waste vegetable oil and triethanolamine hydrochloride according to a mass ratio of waste vegetable oil to triethanolamine hydrochloride being 5-10:1. The cement grinding aid is prepared through the following method comprising: (1) weighing waste vegetable oil and adjusting the pH value to 8-9; and (2) mixing waste vegetable oil and triethanolamine hydrochloride. When in use, 0.115-0.01% of the cement grinding aid is blended during a cement grinding process for application. Compared with the prior art, the method enables reclamation problems of waste vegetable oil to be effectively solved. The cement grinding aid enables cement grinding efficiency and cement strength to be obviously improved, and is low in raw material cost and simple in preparation technology. 本发明涉及种含有废弃植物油的高性能水泥助磨剂及其制备与使用方法，所述的水泥助磨剂包括以质量比5～10:1混合的废弃植物油和三乙醇胺盐酸盐；通过以下方