The list of testing criteria eligible for operation in this Certificate includes: Cement testing; Heavy concrete and concrete mixtures; Testing aggregates for concrete and mortar; Laboratory soil mechanical testing; Testing construction mortar; Field testing; Mechanical testing of masonry bricks; Asphalt concrete; Mechanical testing of concrete blocks; Physical and mechanical testing of mineral powder materials in B.T.N. Technical criteria used for the tests are fully listed, including Vietnamese and foreign standards (if any). When there is a new version of technical standards to replace the old standards, the corresponding new standards must be applied. This certificate is valid for 5 years from the date of issue.