The list of testing criteria eligible for specialized construction activities of the LAS-Construction 1841 laboratory includes: Testing concrete aggregates and mortar; Asphalt concrete testing; Bitumen; Polymer asphalt; Physical and mechanical testing of mineral powder materials in asphalt concrete; Acid-based asphalt emulsion; Field testing. Technical standards used for 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.