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". Excess clinker free lime and periclase at Wuhan cement hydration reaction agent, also produces volume expansion, resulting in poor soundness of cement, this cement on the failure. Portland cement varieties which vary according to the mineral composition of different materials and additional mixing different varieties. Wuhan cement agents, gazebo cement (certified), 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.