Low-calcium cement admixture as well as preparation method and application method thereof

The invention discloses a low-calcium cement admixture as well as a preparation method and an application method thereof. The preparation method comprises the steps of respectively preparing ethylenediaminetetraacetic acid and salt containing main group I metal elements into an ethylenediaminetetraacetic acid solution with the concentration of 3-6wt% and a salt solution with the concentration of 1-4wt%, mixing the ethylenediaminetetraacetic acid solution and the salt solution according to the mass ratio of (1-1.5): 1, and standing to obtain the low-calcium cement admixture. The low-calcium cement admixture prepared by the invention can effectively improve the compressive strength of low-calcium cement, is low in production cost, highly simplifies the production process, and is more suitable for industrial large-scale production. 本发明公开一种低钙水泥外加剂及其制备方法和使用方法。将乙二胺四乙酸和含有Ⅰ主族金属元素的盐分别配置得到浓度为3～6wt％的乙二胺四乙酸溶液和1～4wt％的盐溶液，将乙二胺四乙酸溶液和盐溶液按1～1.5:1的质量比混合后静置即制备得到所述低钙水泥外加剂。本发明制备得到的低钙水泥外加剂能有效的提升低钙水泥的抗压强度，且生产成本低，高度简化了生产工艺，更加适用于工业的大