Cement in the hardening process, if you do not create an uneven cement volume deformation, no cracks or bending of cement bricks, then known as the soundness of qualified; if the hardened cement produced uneven volume changes, resulting in the expansion of harmful white cement prices, the building will crack or even collapse, is called stability failure. Such cement can not be used in the project. In 1907, France Bi Aili aluminum ore bauxite instead of clay-cement products, cement mixing limestone firing became. Because of this cement contains a large amount of aluminum, so called "alumina cement." In 1871, Japan began the construction of a cement plant. In 1877, the British invented the rotary kiln Crampton, and in 1885 by Lan Samu reform into better rotary kiln. In 1889, near the Chinese Tangshan Kaiping coal mine, established with the shaft kiln production of Tangshan "fine cotton soil" plant. 1906 on the basis of the plant's start a new cement company established an annual output of 40,000 tons of cement. In 1893, Japan Endo Hideyuki and seas three Zhen duo invented afraid of the sea of ??portland cement. Cement grade | Wuhan Cement (certified) | riverbank cement provided by the Hongshan District of Wuhan pavilion cement operation. Hongshan District of Wuhan pavilion cement business unit (www.whltsn.com) (www.hbltsn.com) was Wuhan, cement and products leader, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, the maximum Limits to meet customer needs. Wuhan cement leadership with the staff warmly welcome all inquiries negotiations to create a better future Wuhan cement.