Portland Cement for the first time in Iran.Abyek Cement co. has achieved new engineering quality characteristics through designing this kind of product . Simultaneous use of special limestone and high quality Pozzolan in production of this type of cement led to initial and ultimate resistance improvement of composite cements and its capability in cold or hot weather through changes in the ratio of components, reduced permeability, improved durability and reduced heat of hydration.This product has been selected as the best R&D product of the country.