Inspection and testing of concrete

Approved by the examination regulations for sand, stone and cement, concrete inspection and testing, to prevent substandard products put into use. Specimens produced by the laboratory responsible for directing the mixing station completed, all testing personnel must be unified management, earnestly implement the following provisions: Ready mix concrete plant a concrete opening notice, shall promptly under sand, stone mix to adjust the moisture content and in writing concrete mixer machine operators. Appearances concrete slump, the machine temperature, gas content measured by the test chamber and make the original records. Concrete specimens by the laboratory responsible for the conservation.