The Mobile Mix Concrete method, technically called Volumetrically Mixed Concrete, was invented in 1960 by Harold Zimmerman, founder of Zimmerman Industries. Mobile Mix Concrete is a technique of mixing concrete, where the dry ingredients are stored in separate bins on the truck, as opposed to being mixed at a central batch plant. Once arriving on the construction site, the ingredients are proportioned volumetrically by a patented chain feed system and adjustable gate. The ingredients are then mixed in a screw auger while being discharged.

Zim-Mixers are money saving mobile concrete plants delivering any quantity of concrete from one to ten yards - or more - right on the job site. With a Zim-Mixer you eliminate waste and overruns and expand your delivery area. A Zim-Mixer arrives on the job site, and the driver adjusts the material feed system to produce the desired mix of concrete. Production starts immediately - and can even be intermittent. All production is metered, and when your forms are filled, you simply stop your Zim-Mixer, producing only the concrete you need with no over runs. Unmixed materials still on the truck are not wasted - and can be used at the next job - or even the next day.  Since the Zim-Mixer custom blends concrete on site, you can produce many different concrete mix designs in the same delivery run.

A Zim-Mixer can be loaded the night before and be ready to leave at a moment's notice. Each of the materials - sand, stone, cement, and water, has its own storage bin within the Zim Mixer. The Zim-Mixer uses a numbered dial plate making your mix design changes the fastest in the industry. Materials are fed through carefully calibrated controls onto a patented material feed chain system, which requires less maintenance, and lasts up to three times longer than older competing belt drive systems. The chain feed system eliminates the slipping and leakage of materials found with obsolete belt systems.  It eliminates the cement build-up commonly associated with rotary metered cement systems due to moisture and static electricity, giving you a more consistent material flow and a better mix. Zimmerman Industries is so sure of its chain feed system, it carries a three-year warranty. The Zim-Mixer's patented chain delivery system is self-cleaning and designed for low maintenance and high accuracy.

The exact metered materials are fed into a nyhard bladed mix auger. The auger continuously mixes the controlled quantities of cement, stone, sand and water. The bottom mounting of the auger motor puts torque where it does the most efficient job. Zim-Mixers come with a hydraulic lift and a power swing standard on all units. This mixer is so efficient, it meets American Society for Testing and Materials code C-685 with an amazing accuracy. All Zim-Mixers come with a full deck surrounding the entire unit for storage, extra working space, and a better looking unit.