Beijing Xin Jun Jie Building Materials Factory is a professional manufacturer specialized in concrete admixture and dry-mixed mortar. It has integrated research, production and sales as a whole. We are a member of admixture association. After 14-year development, the brand of JJ Concrete Admixture has been very popular in China and responded positively by our customers. All of these have laid foundation for steady development of our company. Dry-mixed mortar, as a high-quality and ...