Number and sampling

Cement factory by the same label, with the whiteness number and sampling. Each number is a sampling unit.

No. According to the annual production of cement:

More than 50,000 tons, not more than 200 tons for a number;

1 to 5 million tons, not more than 100 tons for a number;

10,000 tons or less, no more than 50 tons or no more than three days of production for a number.

Sampling should be representative. Can be taken continuously, but also from more than 20 different parts of the same sample, a total of at least 10 kg.

Test and stay

Each number of white cement samples obtained should be fully mixed. Divided into two equal parts, one by the cement plant in accordance with the provisions of Chapter III of the standard method of testing; a sealed custody for three months, in case of doubt when submitted to the national designated inspection authorities for reinsorship or arbitration.

Factory cement

Factory white cement should ensure that the factory label and whiteness. The remaining quality does not meet the standards of the second chapter of the indicators shall not be manufactured.

experiment report

The cement plant shall send the cement quality test report within 11 days from the date of the cement release. The test report shall include the test results listed in Chapter 2 of this standard other than 28 days of strength.

28 days strength value, should be issued within 32 days from the cement report.

The test report should also be reported whether it is mixed with limestone and blending, and should be attached to the quality of the white cement indicators.