may need to be trucked in from another point, sometimes very near to the site where the road is, sometimes farther away, for the optimal blend, always ensuring that the road is as hard as possible yet not brittle.

The test used to determine the character of the soil is usually the Proctor test. PBS sends the soil to it’s lab in Russia or Florida for a full soil analysis including fines content, plasticity, humidity retention and compaction. For example sand has no fines, or better said it is all fines and has no other mineral or other elements present to make it stick together, unless water is added. Therefore sand mixed with the enzyme solution and 5% cement usually yields an excellent road. Clients may also wish to provide PBS with soil data sheets.

After the soil or soil data has been sent to the laboratory where tests are made to determine fines content, humidity retention, compaction and plasticity characteristics, the engineer will deliver a written report and recommendation for the precise ratio of additives (i.e. pumice or cement etc if needed) to be added to the subject soil.

The road is scarified, the scarified soil is arranged in windrows or rows along the road, a water truck with enzyme and water mixed sprays and soaks the windrows; the sprayed windrows are left overnight and then respread and compacted. The next day the road is finished.

The compacter must be 15 tons minimum weight and preferably rubber-tired.

After about one week, the enzyme surface is extremely solid and ready to be treated with an application of chipseal or asphalt or cement, if so desired. Little asphalt and cement are needed, because the road bed is now hardened and does not either undulate with wear, nor is it affected by moisture, use, or temperature variation.

Existing asphalt roads can be recycled and respread, mixed with enzyme and soil, recompacted and used again resulting in an excellent new road surface. A recycler is needed for this work.

The largest enzyme road project in the World to date was built in Kazakhstan with Roadzyme as the base stabilizer. It is the 51 miles of a 6 lane highway built in Kazakhstan. The actual stretch of Highway was 102 miles of which 51 miles was built using Roadzyme as the base stabilizer and 51 miles was was built using conventional base building methods (crushed rock). The 51 miles of road that was built with Roadzyme as the base stabilizer came in significantly under budget and ahead of time (saving millions of dollars in the process) while the 51 miles constructed using the conventional crushed rock base building method was over budget and well behind schedule. In 2010 the construction company (K Dorstroy) that completed the 51 mile project utilizing Roadzyme was awarded another 37 miles of a major Kazakh highway project. Due to the resounding success of the first 51 miles K Dorstroy is using Roadzyme to stabilize the base of this new 37 mile stretch of Kazakh highway. To view the actual construction of the first 51 mile stretch of highway using Roadzyme please click on the "Enzyme Highway Video" on this page.