Calcium oxide mainly from calcareous material Wuhan cement blocks, such as limestone, chalk, marl and the like; alumina and silica-containing material is derived from the silicate, such as clays, blast furnace slag, fly ash; iron is the use of sulfuric acid production pyrite slag. For the production of portland cement calcareous material content of calcium oxide is generally about 52%; clayey raw material silicon oxide content of about 57% alumina content is less than 20%. Test Method: magnesium oxide and sulfur trioxide by GB 176-76 "Chemical analysis of cement" to. Fineness according to GB 1345-77 "cement fineness testing methods (sieving method)" to. Setting time and stability according to GB 1346-77 "cement standard consistency water, setting time and soundness test methods". Strength by GB 177-77 "cement mortar strength test methods". White cement water-cement ratio is fixed at 0.44. Whiteness according to GB 2016-80 "white Portland cement whiteness test method". Wuhan cement tile, cement pavilion (online consultation), Wuhan 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. Cement leader in the pavilion with the staff warmly welcome all inquiries negotiations to create a better future for cement pergola.