Hydrated lime (Ca(OH)₂) is making waves in the road construction industry for its ability to significantly improve the durability of asphalt. Acting as an anti-stripping agent, it ensures a strong bond between bitumen and aggregate, helping to prevent water damage and extend the life of road surfaces.
Studies show that adding less than 2% hydrated lime to asphalt mixes can increase road longevity by up to 25%. This reduces the frequency of repairs and minimizes the occurrence of potholes and surface deterioration. The material also enhances asphalt’s resistance to cracking in low temperatures, decreases rutting caused by heavy traffic, and slows down bitumen hardening over time.
Widely adopted across Europe and the U.S., hydrated lime is recognized as a critical component for building more resilient infrastructure. It’s even specified in high-performance asphalt used for airport runways, where durability is paramount. Moreover, its role in reducing oxidation in bitumen contributes to slowing asphalt aging, further supporting its use in sustainable construction practices.
With proven results in improving road quality and reducing maintenance costs, hydrated lime is quickly becoming a preferred additive in modern asphalt mixes. Its inclusion promises smoother, longer-lasting roads that meet the demands of today’s traffic and climate challenges.
