基于固废磷化渣的复合型防腐阻锈剂对混凝土性能的影响

为了提高严酷环境下建筑的耐久性，研究了防腐阻锈剂和防腐阻锈混凝土。以三乙醇胺、硝酸铝和Ca(OH)₂为原料，经化学反应，制备新型固体醇胺，再按一定质量分数将固体醇胺、固废磷化渣、石膏和苯甲酸钠混合、球磨，制得复合型防腐阻锈剂，将其掺入基准混凝土中，制得防腐阻锈混凝土，并研究其力学性能和防腐阻锈性能。结果表明：掺复合型防腐阻锈剂的防腐阻锈混凝土，抗压强度和抗折强度显著提高，抗渗等级达P12,碳化深度大幅降低，抗冷热干湿循环和抗冻融性能优异，用含防腐阻锈剂的海水混合液浸泡钢筋2年，钢筋无腐蚀行为。用复合型防腐阻锈剂制备的防腐阻锈混凝土能有效延缓建筑混凝土的腐蚀进程。利用固废磷化渣制备防腐阻锈剂，变废为宝，可为新型防腐阻锈剂的开发提供借鉴。

Effect of composite anti-corrosion and rust inhibitor based on solid phosphating slag on concrete properties

In order to improve the durability of buildings under harsh environment, anti-corrosion and anti-rust concrete were studied. A new type of solid alcohol amine was prepared using triethanolamine, aluminum nitrate and Ca DK(](DK)]OH)2 by chemical reaction. A composite corrosion-resistant and rust-resistant agent was prepared by mixing and milling solid amine, solid waste phosphating slag, gypsum and sodium benzoate in a certain mass fraction. The mechanical properties and anti-corrosion and anti-rust properties were also studied. The results show that the compressive strength and flexural strength of anti-corrosion and anti-rust concrete mixed with compound anti-corrosion and anti-rust agent are significantly increased, with an impermeability grade of P12. The carbonation depth is greatly reduced, and the anti-cold, hot, dry and wet cycle and anti-freeze performance are excellent. The steel bar has been immersed in seawater containing corrosion inhibitor for 2 years, and no corrosion is found. The anti-corrosion and anti-rust concrete prepared with compound anti-corrosion and anti-rust agent can effectively delay the corrosion process of building concrete. The use of solid waste phosphating slag to prepare anti-corrosion and anti-rust inhibitor can be used as a reference for the development of new anti-corrosion and anti-rust inhibitor.