Is aluminium sulfate an accelerator?

Bisley InternationalFAQs

water treatment

When it comes to construction, time is money. And in the realm of concrete, the ability to expedite the setting process is invaluable. This is where Aluminium Sulfate, a seemingly modest chemical, plays a pivotal role. This compound is not just another chemical; it’s a game-changer in the concrete industry, especially in shotcrete applications.

Aluminium Sulfate: A Versatile Accelerator

Aluminium Sulfate, commonly known as alum, is primarily used as a set accelerator in concrete. When added to concrete mix, it reduces the setting time, making the concrete harden faster. This is particularly useful in shotcrete applications where quick setting is crucial. But how does it work? Simply put, Aluminium Sulfate reacts with the calcium hydroxide in concrete to form Aluminium Hydroxide and Calcium Sulfate. This reaction accelerates the hardening process of the concrete, thereby reducing the setting time.

Beyond Concrete: Water Treatment

Apart from its use in concrete, Aluminium Sufhate is also employed in water treatment as a flocculant. It helps in clumping together impurities, making them easier to remove. This dual role of Aluminium Sulfate in both concrete and water treatment showcases its versatility and importance.

Compatibility with Ordinary Portland Cement

Aluminium Sulfate works effectively with Ordinary Portland Cement, enhancing its compressive strength. This compatibility makes it a preferred choice for accelerating admixtures in the concrete industry. Its addition leads to early strength in concrete structures, a critical factor in fast-paced construction projects.

Bisley International: Your Trusted Supplier

At Bisley International, we understand the importance of quality raw materials in the construction industry. Since the early 1980s, we have been a leading supplier of raw materials to the concrete admixture industry across North America. Our commitment to quality and service ensures that your construction projects are not just successful but also completed in a timely manner. Connect with us for your supply of Aluminium Sulfate and other raw materials, and experience the difference in quality and efficiency.


In the fast-evolving world of construction, Aluminium Sulfate stands out as an efficient accelerator for concrete. Its ability to expedite the setting time without compromising on quality makes it a valuable asset. Bisley International, with years of expertise in supplying raw materials, is your go-to partner for sourcing high-quality Aluminium Sulfate. Reach out to us today to accelerate your construction projects!