The list of testing criteria eligible for specialized construction activities of LAS-Construction 71 laboratory includes: Physical and mechanical testing of cement; Aggregate testing for concrete and mortar; Testing construction mortar; Heavy concrete and concrete mixtures; Laboratory soil mechanical testing; Testing of metal materials and welded joints; Asphalt/liquid asphalt testing; Asphalt emulsion testing; Testing mineral powder materials in asphalt concrete; Asphalt concrete testing; Field testing; Testing rubber pillows and expansion joints; Bentonite mechanical testing; Field of mechanical testing of self-inserting concrete bricks; Field of mechanical testing of concrete bricks/unburnt bricks; Testing of physical and mechanical criteria of masonry bricks; Terrazo tile test; Testing of cement floor tiles/Granito tiles; Testing of refractory bricks; Physical and mechanical testing of tiles - natural/artificial stone tiles; Testing autoclaved aerated concrete brick products; Testing SP for foam concrete and non-autoclaved aerated concrete; Putty testing; Testing of geotextiles - absorbent wicks and absorbent wick covers; Testing waterproof clay sheets and mats; Water testing for construction; Chemical additive testing; Active mineral additives for concrete and mortar; Testing of soil and stone reinforced with adhesive; Testing soil-cement mixtures; Testing reinforced concrete sewers: internal sewers and box sewers; Testing PVC and HDPE pipes; Testing the physical and mechanical properties of elastic waterproof polymer tape; Concrete sleepers. 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.