martin marietta, martin marietta materials, martin marietta aggregates, aggregates, gravel, crushed rock, crushed stone, crushed aggregates, quarries, quarry, aggregates, sand and gravel, rocks, stones, rock, sand, stone, granite, sandstone, limestone, ballast, asphalt, materials, rip rap, riprap, construction, road construction, aggregates, concrete, pits, martin marietta composites, composites, bridge decks, fiber reinforced polymers, duraspan, composite bridges, composite bridge decks, frp bridges, frp bridge decks, frp, bridges, creative pultrusions, pultrusion, innovative bridge, ibrc, truss bridge, movable span, lift bridge, composittrailer, mlm, magnesia specialties, martin marietta magnesia specialties

martin marietta materials, inc. is a leading producer of construction aggregates in the u.s., supplying granite, sandstone, limestone, sand and gravel for a wide range of infrastructure, commercial and residential applications. the company is also a leading producer of magnesia products and fiber-reinforced polymer (frp) composite materials.