42 Industrial research in the field of specialty testing for concrete materials, masonry materials, admixtures, aggregates, repair mortars, epoxies, grouts, joint sealants, exterior coatings, water repellents, concrete sealers, waterproofing materials and other materials in related areas of construction; Material testing in the field of construction materials, namely, specialty testing for concrete materials, masonry materials, admixtures, aggregates, repair mortars, epoxies, grouts, joint sealants, exterior coatings, water repellents, concrete sealers, waterproofing materials and other materials in related areas of construction