When you order ready mix concrete, you need every batch to behave the same way. Whether it is a foundation, floor screed, or large commercial pour, the concrete must arrive at the right strength and consistency. That does not happen by chance. It is the result of careful processes at every stage of production.
What Goes Into a Quality Mix
Ready mix concrete is a balanced blend of cement, water, aggregates such as sand and gravel, and sometimes admixtures. Aggregates make up 60% to 80% of the mix, giving the concrete its strength and workability. Clean, potable water free from salts and oils is essential, as contaminants affect setting time and long-term durability.
The water-cement ratio is one of the most critical quality factors. Too much water weakens the concrete; too little makes it unworkable. A reliable supplier checks aggregate moisture content before batching and adjusts the water added accordingly. The UK standard BS 8500 sets out the limiting values for this ratio based on the intended use and exposure conditions of the concrete.
What Affects Consistency
Several factors can introduce variability, even with good ingredients. Changes in aggregate quality between deliveries, poorly maintained mixing equipment, temperature extremes, and long transit times can all affect the finished product. Modern batching plants use automated systems with computerised controls and real-time sensors to measure and dispense materials accurately, reduce human error, and make immediate adjustments if a batch drifts from its target specification.
Testing and Verification
Standard tests confirm that every batch meets its specification. The slump test checks workability by measuring how much fresh concrete drops when a cone mould is removed. The compressive strength test crushes cured samples at 7, 14, and 28 days to verify load-bearing performance. Air content and temperature tests are also carried out on delivery. For a full breakdown of on-site methods, see our guide to testing ready mix concrete strength on site.
Poor quality concrete is a long-term risk. Cracking, spalling, and air voids are all signs of quality problems that reduce structural life. High-quality concrete can last 50 to 100 years; poorly produced concrete may need significant repair within 10 to 20.
Accreditation and Express Concrete’s Approach
Express Concrete holds QSRMC certification, an independent accreditation covering BS EN 206, BS 8500, and ISO 9001. This means our production facilities, quality control systems, and testing procedures are assessed and verified by a third party, not just self-reported. You can view the full details on our accreditations page.
Our batching plants use documented mix designs and calibrated automated systems, so the same grade of concrete is produced to the same specification every time it is ordered. We have been delivering across London since 1991, and that consistency is built into how we work.
Choosing the right concrete grade is just as important as quality control. Our guide to concrete strength classes helps you match the right mix to your project.
