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    Chemical​‍​‌‍​‍‌​‍​‌‍​‍‌ Accelerators and Retarders: Controlling Concrete Setting Time

    adminBy Updated:49 Comments3 Mins Read

    Concrete is one of the most versatile building materials, but timing is everything when it comes to its application. Tweaking how fast or slow your concrete sets can still be a significant time-saver, waste-reducer, and quality-enhancer for your results.

    Through the help of this article, you can not only read about the use of chemical accelerators and retarders, but also figure out how to control the setting time of the concrete efficiently.

    What Are Chemical Accelerators and Retarders?

    Accelerators are chemicals that, when added to concrete they make it harden quickly. They are especially handy in low-temperature situations or when quick strength is required. Alternatively, retarders slow the hardening of concrete. Therefore, a hot climate or a massive pour, where one needs extra working time before the concrete sets, would be ideal for a retarder.

    When you use these chemicals, the timing of your work can be project-based, and hence the concrete can deliver the performance required of it.

    Benefits of Using Accelerators

    The benefits of using accelerators are the following:

    • Speed up Initial Strength: Accelerators allow concrete to achieve initial strength in a short period. The fast form removal or the early load-bearing that describes these kinds of jobs is what makes the point most important.
    • Performance in Chilly Seasons: Concrete setting naturally becomes a slow process under freezing conditions. Consequently, the application of an accelerator would help in a situation where there would be no waiting and no damage due to frosts.
    • Time of the Project is Reduced: The brief time intervals for the cement to harden pave the way for speeding up different stages of construction, thus, labour and equipment expenses get saved.

    Advantages of Retarders

    Below are the advantages of retarders:

    • Workability Time is Prolonged: The use of Retarders in concrete allows the person handling it to have sufficient time for all the necessary operations, namely, transport, placing, and finishing.
    • Management of Large Pours: When the production of big slabs or floors is considered, the slowing down of the setting is a means to an end, that is, a uniform finishing that doesn’t have cold joints.
    • Surface Quality: Slow setting can contribute to less cracking and a better finish of the concrete surface in general. Applying epoxy primer paint can also help prolong the durability.

    Choosing the Right Product

    When choosing a chemical accelerator or retarder, factors such as the type of work and the environment should be considered. Good manufacturers and suppliers like Sealbond put their instructions and dosage suggestions up front. They also cater products such as primer for epoxy as a chemical solution.  Apart from that, seeking the opinion of suppliers or experienced contractors can be very helpful in making a well-informed decision and, in turn, giving you confidence that your concrete will perform as expected.

    Wrapping Up

    Chemical accelerators and retarders are the most effective means of controlling concrete setting time. They increase the flexibility, save time, and help to get high-standard results, whether it is the pouring of the foundations, floors, or large slabs. The only thing you should do to benefit from these chemicals is to be cautious about the weather, meet the deadlines, and get the surfaces ready for finishes, such as epoxy resin floors.

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