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We do Asphalt

We do Asphalt

We do Asphalt

FAQs

Asphalt is a mixture of aggregates (such as sand, gravel, and crushed stone) and a binder, typically bitumen, which is a sticky, black, and viscous form of petroleum. This combination creates a durable material used for paving roads and other surfaces.

The lifespan of an asphalt pavement can vary depending on factors such as traffic load, climate, and maintenance. Generally, well-constructed and properly maintained asphalt pavements can last 15-20 years or longer.

Regular maintenance of asphalt includes sealcoating, filling cracks and potholes, and resurfacing. Sealcoating helps protect the asphalt from UV rays, water, and chemicals, while filling cracks and potholes prevents further deterioration.

Asphalt is 100% recyclable, which significantly reduces its environmental impact. Reclaimed asphalt can be reused in new asphalt mixes, decreasing the need for new raw materials and reducing waste. Additionally, modern production techniques aim to lower emissions during asphalt manufacturing.

Asphalt typically takes about 24-48 hours to dry sufficiently for light use, such as pedestrian traffic. However, it can take up to 6-12 months to fully cure and achieve maximum hardness. During this time, it’s essential to avoid heavy traffic and harsh conditions.

Hot mix asphalt (HMA) is produced by heating the asphalt binder and aggregates to high temperatures (around 148°C), allowing for easy mixing and laying. In South Africa, HMA is widely used for constructing highways, urban roads, and airport runways due to its durability and ability to withstand heavy traffic loads. Warm mix asphalt (WMA), on the other hand, is produced at lower temperatures (between 93°C and 121°C), reducing energy consumption and emissions during production while still maintaining similar performance characteristics. WMA is increasingly being adopted in South Africa as part of efforts to enhance sustainability and reduce the environmental impact of road construction.

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