Stephens Enviro-Matic^® System - Generation Two

Stephens Enviro-Matic System
Generation Two

The Original Recycler - Now Better Than Ever

Solves Every Ready Mix Recycling Problem

Slurry Management Technology Protect Quality 

World Leader in Recycling Returned Concrete

Available in Three Models: EM-20, EM-40, and EM-60

Stephens Enviro-Matic is a fully engineered, single source turnkey system for the profitable management of returned ready mix concrete.  

Key Features of a Typical Enviro-Matic System

Turn waste concrete disposal problems into profit! Only Stephens Enviro-Matic™ does it all. It recycles 100% of your returned concrete - course aggregates, cement and water. There is nothing like this compact, field proven, advanced system that eliminates space-robbing settling ponds and skyrocketing disposal costs. The key to the success of Enviro-Matic™ is that it is the only system that stores and controls slurry, keeping the fine particles in suspension in and underground mixer-blender. It monitors the specific gravity of the slurry and delivers it on demand to the batch plant for the batching of fresh concrete.

1.  Slurry Reservoir, three alternate sizes offered to meet production requirements.  Underground location provides natural insulation from temperature extremes.

2.  Slurry Agitator keeps solids in suspension.  Horizontal orientation at bottom of reservoir means agitation takes place where the slurry is most dense for highly efficient operation.  By comparison, vertical agitators are energy gluttons.  Agitator shafts have universal-joint mounting which permits, in case of extended power outage, one end of the shaft to be lifted out of the slurry.  When the power comes on, the shaft can be slowly lowered back into the slurry to resume agitation - a great design feature, should you ever need it. Slurry agitators typically run just 32 minutes per day and use only 5% of the power consumed by competitive agitators, even with slurry densities up to 1.5 S.G.

3.  Enclosed Agitator Drive System.

4.  Density Cell measures specific gravity of slurry whenever activated by batchmen.  Result of measurement is displayed at batch control panel and used as input to solids correction plug-in software for computer controlled batching.

5.  Rugged Screw Classifier moves coarse and fine aggregates up one side of specially designed screw trough.  Cement fines and water flow down the other side for superior washing and dewatering.  Screw has abrasion-resistant Ni-hard replaceable wear plates for extended service life.  Universal-joint drive permits raising one end of screw out of trough for inspection and maintenance.

6.  Washout Water Station injects programmed quantity of water into drum.

7.  Weir surrounding lower portion of screw classifier permits only slurry to fall into storage reservoir.

8.  Operator Start Button initiates washout sequence.

9.  Optional Auxiliary Conveyor Belt and shaker screen are controlled by the Enviro-Matic and run only on demand.

10.  Hydrocyclone strips sand fines from slurry.

More Features

Available Models

Modular Design Components

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• Exclusive Underground Slurry Storage Tank

• Density can be reduced by passing slurry through the Hydocyclone to optimize suspended solids in the slurry

• Density Cell Automatically Measures Specific Gravity

• Batch computer slurry solids correction software makes precise corrections in quantities of solids and water to maintain mix design proportions, yield and water/cement ratios regardless of slurry density

• Programmable slurry agitation can ensure consistently uniform density

• Slurry can be heated or chilled when ambient temperatures are an issue

• Because Enviro-matic handles higher densities it facilitates complete daily depletion of the slurry reservoir contents and eliminates the need for hydration stabilizers

• Density can be reduced by dilution in the slurry reservoir or at the point of batching

• Submerged slurry agitator shaft bearing assemblies typically work 10 to 20 years without rebuilding

• There has never been a replaced or broken agitator shaft in any Enviro-Matic!

• Superior Washing Action

• Automatic Backflushing Prevents Grout Buildup

• State of the Art Controls

• Vortex Shedding Meter

• Slurry Press Module Completely Dewaters Slurry

• Drainage Containment Module Adds System Versatility

• Energy Efficient As-Needed Action

• Fast and Easy Installation in days, not weeks

• Completely Automatic Operation

• Compact - fits in 20' x 30' space

Model Comparison