Using Calcium Chloride on Asphalt Millings: Benefits and Considerations

Calcium chloride, a chemical compound known for it’s versatility and de-icing properties, has gained substantial recognition in the field of pavement maintenance. Addressing it’s potential advantages, such as dust suppression, improved compaction, and enhanced durability, alongside the possible drawbacks, including environmental implications and application challenges, is crucial for making informed decisions in road maintenance and construction projects.

Is Calcium Chloride Safe for Asphalt?

Calcium chloride, when used on asphalt millings, raises concerns regarding it’s safety and potential effects on the pavement. One significant issue with calcium chloride is that it tends to leave behind a greasy residue. This residue can create a slippery surface, posing a risk to pedestrians and vehicles alike. Moreover, the greasy residue isn’t only unsightly but can also lead to staining on the surface of your asphalt.

Additionally, calcium chloride has the potential to generate extreme heat when it comes into contact with moisture. This can cause further damage to the asphalt, especially during freezing and thawing cycles. The excessive heat can accelerate the deterioration of the pavement, leading to cracks, potholes, and other forms of structural damage.

Considering these considerations, it’s advisable to explore alternative options for treating asphalt millings. There are various other additives available in the market that can provide similar benefits without posing the same risks. It’s essential to consult with experts in the field to determine the most suitable treatment for your specific asphalt millings project, taking into account factors such as climate, traffic volume, and intended use.

Alternative Additives for Treating Asphalt Millings

  • Polymer modifiers
  • Latex emulsions
  • Organic resins
  • Fiber additives
  • Rejuvenators
  • Lime
  • Cement

Adding calcium chloride to concrete can indeed have a detrimental effect on it’s long-term durability. This chemical has been known to increase the risk of future damage, as it can cause the concrete to shrink during the curing process, ultimately leading to the formation of unsightly cracks on the surface.

Does Calcium Chloride Ruin Concrete?

Concrete mixed with calcium chloride has more of a tendency toward future damage than concrete without this chemical. The chloride can cause the mix to shrink as it cures, creating cracks in the surface. This is because calcium chloride accelerates the hydration reaction in concrete, causing it to set faster. While this can be beneficial for certain applications where quick setting is desired, it can also lead to long-term issues.

The presence of chlorides can initiate or accelerate the corrosion process, which can weaken the structure over time. This is particularly concerning in areas with high exposure to salt or other corrosive substances, such as coastal regions or areas where de-icing salts are used frequently.

It’s a hygroscopic material, meaning it attracts and absorbs moisture from the environment. This can lead to increased moisture content in the concrete, which may result in reduced strength and durability, as well as potential issues with freeze-thaw cycles. Calcium chloride can also cause efflorescence, a white powdery substance that forms on the surface of concrete and can be aesthetically displeasing.

How to Mitigate the Effects of Calcium Chloride on Concrete

One way to mitigate the effects of calcium chloride on concrete is by applying a concrete sealer. The sealer forms a protective barrier on the surface of the concrete, preventing the calcium chloride from penetrating and causing damage. Additionally, properly curing the concrete can help minimize the negative impacts of calcium chloride. Curing involves keeping the concrete moist and protected from extreme temperature changes for a specified period of time, allowing it to fully harden and strengthen. It’s important to follow manufacturer guidelines and consult with professionals for specific recommendations on how to mitigate the effects of calcium chloride on concrete.

Source: Disadvantages of Using Calcium Chloride as a Concrete …

Using calcium chloride on your driveway can be a beneficial solution to prevent freezing and erosion. When mixed with water, it can effectively lower the freezing point, keeping your driveway safe from ice formation in extremely cold temperatures. Additionally, the release of heat upon contact with water helps to melt existing ice and prevent further build-up. For those with dirt roads or driveways, calcium chloride can also be used to mitigate erosion by spraying it as a solution.

Can I Use Calcium Chloride on My Driveway?

Yes, you can use calcium chloride on your driveway. It’s commonly used as a de-icing agent during winter months to prevent the formation of ice and snow. When combined with water, calcium chloride generates heat, which helps to melt the ice and prevent the driveway from becoming slippery. This makes it a highly effective and popular choice for keeping driveways and walkways safe during freezing temperatures.

In addition to it’s de-icing properties, calcium chloride can also be beneficial for maintaining dirt roads or driveways. When sprayed on dirt surfaces, it helps to reduce dust and control erosion. The calcium chloride solution penetrates the soil and binds it’s particles together, preventing them from becoming loose and being carried away by wind or water. This can greatly improve the stability and longevity of gravel or dirt driveways, especially in areas with heavy traffic or high erosion rates.

Firstly, it’s crucial to ensure that the calcium chloride solution is applied properly, as excessive use or improper application techniques can lead to surface damage. It’s recommended to consult with a professional or follow manufacturer guidelines for the appropriate dosage and application methods.

Secondly, it’s essential to consider the environmental impact of using calcium chloride. While it’s effective in preventing ice formation and controlling erosion, the runoff from the treated area can potentially impact nearby vegetation, groundwater, or aquatic ecosystems.

However, it’s essential to consider the potential risks and to apply it responsibly to minimize any negative impacts. Consulting with professionals or experts in the field can provide valuable guidance and help ensure a successful and environmentally conscious application.

Pros and Cons of Using Calcium Chloride on Driveways

  • Pros of using calcium chloride on driveways:
    • Effective in melting ice and snow
    • Helps prevent slip and fall accidents
    • Quickly breaks down ice buildup
    • Can be applied in extreme temperatures
    • Relatively affordable compared to other ice melt options
  • Cons of using calcium chloride on driveways:
    • Can damage concrete surfaces if overused
    • May cause corrosion on metal surfaces
    • Can be harmful to plants and soil
    • Can track indoors and stain carpets or flooring
    • Requires proper storage to avoid moisture absorption

Dust control is an important aspect of maintaining road surfaces, especially during dry summer months. One effective method is the application of calcium chloride, a compound known for it’s dust-controlling properties. By applying a calculated amount of LIQUIDOW calcium chloride, DOWFLAKE XTRA, or PELADOW to the road surface, dust can be significantly reduced. The recommended application rates for these solutions ensure minimal maintenance and long-lasting dust control effects.

How Do You Apply Calcium Chloride for Dust Control?

When it comes to dust control on asphalt millings, one effective method is to apply calcium chloride. Calcium chloride is a compound that helps to attract and retain moisture, which in turn helps to suppress dust particles.

The first step is to make sure you’ve the right type of calcium chloride. LIQUIDOW calcium chloride is a common choice, with a 38% solution being highly effective. Once you’ve your calcium chloride, it’s time to apply it to the road surface.

The recommended rate of application is 0.27 gallons per square yard. This can be achieved by using a sprayer or a sprinkler system to evenly distribute the calcium chloride solution across the millings. If you prefer a different form of calcium chloride, such as DOWFLAKE XTRA or PELADOW, the application rate will be different. For DOWFLAKE XTRA, it’s recommended to apply 1.69 pounds per square yard, while for PELADOW, the recommendation is 1.32 pounds per square yard.

After applying calcium chloride, you’ll find that dust control is usually maintained throughout the summer with minimal attention. This means less time and effort spent on frequent maintenance and reapplication.

It acts as a binder, holding the millings together and creating a more durable and stable road surface. This can extend the lifespan of the millings and reduce the need for frequent repairs or replacement.

It’s a cost-effective and efficient solution for keeping dust in check and maintaining a clean and safe road surface throughout the summer months.

Case Studies or Real-Life Examples of Using Calcium Chloride for Dust Control on Asphalt Millings

  • Highway construction projects in California
  • Parking lot renovation in New York City
  • Industrial warehouse dust control in Texas
  • Residential road maintenance in Arizona
  • Airport runway improvements in Florida


This chemical compound effectively enhances the stability and durability of the millings, reducing the risks of dust emission, erosion, and material degradation. Furthermore, it acts as a powerful dust suppressant, improving visibility, air quality, and road safety. However, proper application, dosage, and environmental considerations are crucial to ensure optimal results and minimal negative impacts.

Scroll to Top