Definition
Ready mix asphalt — also called bagged cold mix or 'asphalt in a bag' — is a complete asphalt material supplied ready to use. The manufacturer blends polymer-modified bitumen with washed graded aggregate at the plant, packages it in sealed bags, and ships it to site.
How it's different from hot mix
Hot mix asphalt is produced at 150 °C, delivered hot in insulated trucks, laid with a paver and compacted before it cools. Ready mix is produced and applied at ambient temperature — the polymer-modified emulsion binder stays workable in the bag and cures on compaction.
What it's used for
- Pothole repair
- Utility cut reinstatement
- Trench backfill surface course
- Edge break repair
- Driveway and car park patching
- Emergency wet-weather repairs
How to use it
- Clean the defect.
- Square the edges.
- Pour the ready mix in, overfilling by 15%.
- Compact with a tamper or vehicle wheel.
- Sweep loose fines and open to traffic.
Why it's popular
Speed and simplicity. One person can fix a pothole in 15 minutes without specialised equipment, in any weather, anywhere there is road access. For organisations responsible for pavement assets, that response time is the difference between proactive maintenance and reactive complaints.
Frequently asked questions
Is ready mix asphalt the same as cold mix?
Yes. 'Ready mix asphalt', 'cold mix asphalt' and 'asphalt in a bag' all refer to the same family of products.
Can I use ready mix on a new build?
Ready mix is designed for repair and reinstatement, not for new full-depth construction. For new pavements use hot mix laid with a paver.
How long does ready mix last in the bag?
12 months in a sealed bag stored in a dry, shaded location.
