CRH plc is a diversified building materials company, which manufactures and distributes building material products from the fundamentals of heavy materials and elements to construct the frame, through exterior products that complete the building envelope, to distribution channels, which service construction fit-out and renewal. It operates in six business segments: Europe Materials (including activities in China and India), Europe Products, Europe Distribution, Americas Materials, Americas Products and Americas Distribution. CRH�s materials businesses is engaged in the production and sale of a range of primary materials, including cement, aggregates, readymixed concrete, asphalt/bitumen and agricultural and/or chemical lime. It manufactures products for use in residential, nonresidential and infrastructure construction applications. In June 2011, its Allied Building Products Corp. acquired Astro Building Supplies, Inc. In May 2012, it transferred its 49% interest in Secil to Semapa.