What is a Mobile Concrete Mixer?
Mix concrete on-site with a volumetric concrete truck as an on-demand concrete production solution. All essential materials for concrete production (sand, cement, stone, water and any other materials or admixtures) are stored in separated compartments and transported to a job site where they are mixed on a continuous or intermittent basis as required for fresh maximum strength concrete.
Concrete produced by mobile concrete mixers meets standards established by ASTM C685 and AASHTO M-241 standards as well as DOT requirements.
The blending of materials is a continuous process, mixing the aggregates, sand, cement, water and admixtures for the exact mixture every time. The operator can stop the mixing and delivery and start again at any time, this allows production to balance the demands of finishing and placing crews or other job requirements.
Any amount of concrete can be produced from one to 400 yards or greater per day for continuous pouring as long as the unit is re-loaded with materials at the job site. Mix designs can be changed or altered without moving the machine; the operator can adjust at any time as required for the job site. When the job is finished cleanup is an easy process by only washing out the mixer area.
Separate Material Compartments
Volumetric concrete mixers carry materials such as sand, cement, and coarse aggregates in divided bins mounted on the unit; all the bins are loaded from the top and the cement bin has a watertight cover. Water is also carried on the mixer unit in tanks.
Sand and stone are carried in a side by side divided, open-topped bin with the sand holding 45% of the bin’s volume and stone side holding 55%. Aggregates can be carried separately or mixed as needed according to the design mix; the versatility of mobile mixers allows for virtually unlimited concrete mixes.
Cement is carried in a watertight bin with automatic vibrators and mechanical devices to ensure accurate cement proportioning and constant cement flow to the feeder. Water is carried in the tanks and pumped into the mixer; water flow controls and flowmeters accurately monitor the flow, stopping and starting automatically whenever the conveyor belt is stopped or started.
For other concrete output requirements or specialty jobs, liquid admixtures such as accelerators, retarders, air entraining agents, modified latex and such can be carried in a separate system which introduces the ingredient as needed via flow controls and flowmeters.
Proportioning Systems
Measuring (or proportioning) by volume not weight is at the heart of the volumetric mobile mixer and the final product is capable of accuracies better than +/- 1%. Materials are stored in separate bins and are proportioned to the mix based on the mix design. This enables the operator to mix the exact amount needed eliminating overages and shortages. Proportioning gives the operator control over the mix design and how much is mixed.
Mixing
Mobile concrete mixers allow you to measure and mix concrete to exact specifications right at the job site. This precision means you get the best possible concrete every time, without the need to add extra water, which can weaken the mix. By mixing concrete on-site, you can maintain the precise ratio needed for optimal strength and durability, ensuring a high-quality product.
What are the Benefits of Using Mobile Concrete Mixers?
- Increase profits by paying less for concrete
- Protect your budget and eliminate concrete waste
- Ensure every pour is up to your standards
- Maintain concrete strength with volumetric mixing
- Take control over your schedule and employee time
- Handle emergencies or weekend jobs
- Make short loads a thing of the past
- Eliminate the hassle of extra concrete at the end of a project
Contact Cemen Tech or call 800.247.2464 to learn more about mobile concrete mixers. Check out our case studies to see how others are using Cemen Tech volumetric mixers.
