1
Polymer composites and hydrogen sulfide reduction chemicals for use in road construction, rehabilitation, and maintenance
19
Non-metallic building materials, namely, asphalt; chip sealing aggregates in the nature of asphalt, bitumen, sand, gravel, slag and crushed stone, and recycled concrete; road surface dressings made of asphalt and bitumen; road surface materials, namely, roadway wearing course made primarily of asphalt and bitumen; road surface overlay made of asphalt and bitumen
42
Product research and development in the field of asphalt, chemical products, and fuels; scientific research and development in the field of asphalt, chemical products, and fuels; laboratory research in the field of asphalt, chemical products, and fuels; technical research in the technology fields of asphalt, chemical products, and fuels; design and testing for new product development in the field of asphalt, chemical products, and fuels; engineering services for the construction of commercial buildings, plants, and sites; scientific research in the field of asphalt, chemical products, and fuels; research on building construction for commercial buildings, plants, and sites; drafting of construction plans for commercial buildings, plants, and sites; construction drafting; technical support services in the nature of testing and assessing pavement conditions and recommending construction materials to be used for building or paving roads; testing and design of paving materials; quality control services for others during road construction; technological consultation in the field of selecting the appropriate raw materials for the manufacture of asphalt and asphalt products that are suitable for their intended uses
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