When planning a concrete project, one of the first decisions is whether to use ready mix concrete (RMC) delivered from a batch plant, or to mix concrete on-site using bags or a portable mixer. For small DIY projects, site mixing can work. But for anything beyond a few cubic feet, ready mix almost always wins on quality, cost, and efficiency.
What is Site Mix Concrete?
Site mix concrete is produced at the job site by combining cement, sand, aggregate, and water — either by hand, in a portable drum mixer, or using a volumetric mixer. The quality depends entirely on the accuracy of the person mixing it.
RMC vs Site Mix: Head-to-Head Comparison
| Factor | Ready Mix (RMC) | Site Mix |
|---|---|---|
| Quality consistency | High — automated batching | Variable — human error risk |
| Strength accuracy | Engineered to exact PSI | Difficult to verify |
| Volume capacity | Any volume, any project size | Limited by mixer capacity |
| Labor required | Minimal — just place and finish | High — mixing, loading, transporting |
| Time efficiency | Fast — truck delivers ready to pour | Slow — continuous mixing required |
| Cost (large pours) | Lower per yard at scale | Higher labor and equipment costs |
| Admixtures | Precisely dosed at plant | Difficult to add accurately |
| Quality records | Digital batch tickets | None |
When Site Mix Makes Sense
- Very small repairs under 0.5 cubic yards
- Remote locations with no ready mix access
- Non-structural applications where strength isn't critical
When Ready Mix is the Right Choice
- Any pour over 1 cubic yard
- Structural applications — foundations, slabs, columns
- Projects requiring specific PSI or admixtures
- Commercial or permitted work requiring batch tickets
- Time-sensitive pours where consistency matters
- Any project in Sacramento, Roseville, Folsom, Auburn, Rocklin, Elk Grove, Yuba City, Davis, Woodland, or El Dorado Hills — JLC delivers within 60 miles
The Bottom Line
For virtually every project beyond a small patch repair, ready mix concrete from a local RMC supplier like JLC Ready Mix delivers better quality, faster execution, and lower total cost than site mixing. Our automated batching, GPS-tracked fleet, and competitive pricing make it easy to choose RMC for your next project in Northern California.
Get a quote for ready mix delivery to your job site. Call 916.253.9017 or order online.
