Blended cement, a combination of mineral and pozzolanic materials with Portland cement, plays a significant role in improving the performance of concrete. Using this type of cement in concrete mixtures enhances the physical, chemical, and durability properties of concrete under various environmental conditions.
Some of the main features of blended cements include:
One of the main characteristics of blended cement is its ability to control the alkali-silica reaction (ASR). This reaction can lead to expansion, cracking, and damage to the structure. Using blended cement with pozzolanic materials reduces the amount of free alkalis in the concrete mix and prevents this reaction from occurring.
In projects involving mass concrete pours, excessive heat generation can cause thermal cracking. Blended cement reduces the extent of chemical reactions, thereby lowering the heat produced during hydration and minimizing the risk of cracking.
The presence of active mineral components in blended cement fills the voids within concrete and decreases open pores. This not only increases the density of concrete but also restricts the entry of water, ions, and harmful gases into the concrete structure.
Concrete made with blended cement is more resistant to the leaching of cementitious materials by flowing water. This increases the service life of structures such as bridges, tunnels, and docks that are exposed to running water.
Compared to ordinary cements, blended cement offers better resistance to carbonation and sulfate attacks. This feature is especially important in humid, industrial, or sulfate-rich soil environments.
While the initial strength of concrete with blended cement may be slightly lower, in the long term, significant increases in compressive and flexural strength are observed. This is a key advantage for long-lasting structures.
Blended cement adjusts the setting time, allowing for better placement of concrete in hot weather or on large projects. It also prevents false set, a phenomenon that can disrupt the concreting process.

Kurdistan Cement Factory
In 1986, to advance this project, the Ministry of Industries founded Divandarreh Kurdistan Cement Company in partnership with Sepahan, Sofian, and Shomal Cement companies. This company was officially registered under No. 614140 on 17 September 1986.
In early 1992, construction of the production line began, and with the import of foreign machinery worth about $42 million, this operation continued until 1993.
On 10 July 1996, Kurdistan Cement Factory officially started operations with a daily production of 2,300 tons of clinker.
In 1999, the Kurdistan Cement Company changed its type from a private joint stock company to a public joint stock company. Moreover, in 2003, the shares of Ehdas Sanaat Company were transferred to Ghadir Investment Company.
In 2006, with the launch of the capacity expansion project, Kurdistan Cement Factory was able to increase its production to 3,200 tons per day.
In 2015, with the operation of the multi-chamber silo and roller mill, the cement production capacity of this factory reached 6,000 tons per day.
Kurdistan Cement Company, the largest industrial unit in Kurdistan Province and a leading manager in western Iran, was established in 1996 for sustainable and economic development in the region. By using the latest technologies, the company has increased its nominal capacity to 6,000 tons of cement per day. Additionally, the production of custom-made cement using multi-chamber silo technology has distinguished this factory as a unique entity in the region.
In 2023, Kurdistan Cement Company, aligning with the vision of Ghadir Investment and Industry, is on the path of innovation and sustainable development. The company, through strategies to identify and address key needs, strives to be recognized as a trustworthy and profitable partner in the cement industry and regards all its stakeholders as valuable partners.