Blended Cements

Main Information

Description

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.

Product Technical Description

Some of the main features of blended cements include:

1. Reduction of Alkali-Aggregate Reactions

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.

2. Reduction of Heat Generated by Hydration

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.

3. Decreased Permeability and Porosity of Concrete

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.

4. Enhanced Concrete Durability Against Flowing Water

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.

5. Resistance to Carbonation and Chemical Attacks

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.

6. Improved Mechanical Strength Over Time

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.

7. Optimized Setting Time and Prevention of False Set

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.

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About the Business

Kurdistan Cement Factory

Address:
  • Factory: Iran, Kurdistan Province, Bijar County, 5th kilometer Takab Road, Kurdistan Cement Factory
  • Head Office: Iran, Tehran, Argentina Square, Alvand Street, No. 11

From Yesterday to Today: History and Developments of Kurdistan Cement Company

  • 1973 - Initiation of Kurdistan Cement Project Studies

    In 1973, studies to establish a cement factory in Kurdistan Province began. These studies were conducted to meet the industrial demands and economic development of the region.
  • 1977 to 1978 – Factory Site Selection and Completion of Company Studies on Cement

    In these years, the Industrial and Mineral Development Bank, in cooperation with a British company, selected the Divandarreh region to build the cement factory and conducted complementary studies. Eventually, in 1981, the Industry and Mine Bank transitioned the project to Kurdistan Cement Company.
  • 1986 – Official Registration of Kurdistan Cement Company

    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.

  • 1987 – Share Transfer and Structural Changes

    In 1987, 70% of the company's shares were transferred to Ehdas Sanaat Company. Following these changes, in 1989, the company’s name was changed to “Kurdistan Cement Company (Private Joint Stock).” Also, the project site was relocated from Divandarreh to Kilometer 5 of Takab Road in Bijar (the current factory location) and construction of the factory commenced.
  • 1992 to 1993 – Construction of Production Line with Foreign Technology

    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.

  • 1996 – Official Launch of Factory at a Capacity of 2,300

    On 10 July 1996, Kurdistan Cement Factory officially started operations with a daily production of 2,300 tons of clinker.

  • 1999 – Converted to Public Joint Stock

    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.

  • 2006 – Increase in Production Capacity

    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.

  • 2015 – Improvement of Cement Production

    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.

Introducing Kurdistan Cement Company

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.

Kurdistan Cement Company’s Vision and Mission

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.