Technical requirements magnesia clinker MgO content shall not exceed 4.5%. Content of sulfur trioxide trioxide cement shall not exceed 3.5%. Fineness 0.080 mm square hole sieve shall not exceed 10%. Setting time initial set no earlier than 45 minutes, the final setting not later than 12 hours. Stability test with boiling cooking method, had to qualify. The strength of each label corresponding order of strength are not less than the value in Table 1: Table 1 Wuhan compressive strength cement grade cement manufacturers, kg / cm 2 compressive strength Wuhan cement, kg / cm 3 days 23 days 28 days 28 days whiteness white Cement lowest brightness value of not less than 87. The number and the acceptance of the rule editor before sampling cement factory by the same label, same whiteness number and sampling. Each number is a sampling unit. Number according to the provisions of annual cement production: 50,000 tons or more, no more than 200 tons of a number; 1 to 5 tons, more than 100 tons is not a number; 10,000 tons or less, and not more than 50 tons, or a yield of less than three days a number. Sampling shall be representative. Wuhan cement, cement, cement pavilion by pavilion Hongshan District of Wuhan cement operation. Hongshan District of Wuhan pavilion cement business unit (www.whltsn.com) (www.hbltsn.com) strong, credible, in Wuhan of cement and related products industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead gazebo cement into the brilliant and you work for a better future!