There are many questions that arise when using or learning about any technology, I will attempt to answer the frequently asked in no particular order.
 

• Q: What is the setting or curing time for Endurazyme.
• A: Curing time is 7 days but cure continues for 28 days.
• Q : How soon can traffic be run on the road.
• A: All during the construction and immediately after.
• Q : Cracking and or crazing has occurred on the surface, Why.
• A : Over optimum moisture content during construction or heavy rain during or after construction.
• Q : What can be done to correct this and what will be the effect.
• A : Two things can be done, on heavy traffic roads it will correct it's self with no problems or the surface 20mm can be re-worked as you have 7 days curing.
• Q : How much gain in CBR can be expected.
• A : This will depend on the soil and gravel being treated, but anywhere   from 100% to 1200%. Independent empirical evidence is available.
• Q : Can the surface be maintained should it be damaged or worn.
• A :  Yes! But Endurazyme must be used to patch or resurface the treated road. Please ask for a Maintenance Guide.
• Q : If for some reason a customer does NOT profile the gravel road with a 5-6 % gradient to each side, but "accidentally" keeps it 100 % horizontal,  then what ?
• A : Good work practices are essential to good road construction and should only be carried out by professionals. Drainage and profile errors are nothing to do with the efficacy of the product and puddling will occur which will undermine the road. 
• Q :Does water quality effect the result ?
• A : Generally no! Brackish water and sea water have been used successfully but the better the water supply the less problems will occur.
• Q : Can Endurazyme be used with Lime or Cement.
• A : Endurazyme will allow the use of both to be cut by half and a massive increase in CBR's cab be gained along with huge savings in material costs. More information available on request.
• Q : What is the largest benefit to using Endurazyme.
• A :  Using low quality insitu soils and gravel's to construct low cost low maintenance roads. Saving valuable resources in the construction of highways.
• Q : What are the main elements of Endurazyme.
• A : There are three main elements 1] sophisticated surfactants that allow the other two elements to penetrate the clay based soils and make it workable. 2] electrolytes that change the cation exchange of the clay platelets and  3] enzymes that cement together the clay platelets within the sands, silts and gravel's.
• Q :If we double the application rate will we get twice the strength ?.
• A : No! You lose the benefit of the cation exchange as it will be reversed and you will end up with a lower strength.
• Q : Freeze / Thaw.. Is endurazyme effected by freeze/thaw.
• A : No! Endurazyme is not effected by freeze thaw, this documented over years but Endurazyme should not be applied in freeze conditions.
• Q: We are still getting dust from the road after 3 weeks, why
• A: The soil used is low in clay content and high in silt fines, a proportional mix design should have been used. Remember clay is the binder and that Endurazyme only works on the clay particles within a soil / gravel mix
• Q: It rained within seven days of construction and the road got very
   Slippery and wheel tracks could be seen
• A: This has do with good work practices during construction which 
  include, rain  during construction, correct drainage and profile
  ( see notes below ).
• Q: If 82% of the enzymes are gone within 48 hours, how is it possible that only water will activate the enzymes up to 7 days, enough that a thin layer of gravel can then be rolled into the surface? We tried after three days and the surface was so hard that it would not penetrate the surface?
• A: The fact is that Endurazyme is 82% biodegraded in 14 days and you have 7 days that you can store the treated soil prior to compaction. After full  compaction the surface will be tight and will require re-application of Endurazyme at 1000 to 1 to soften the surface.
• Q: Which roller is best, can you clear this question up?
• A: All rollers have there place in the construction process and they all be used were possible in there role. (Please see notes below on compaction)
• Q: It has been said by Brian that they only roll in a thin layer of gravel if the   road is on a hill and that is it not necessary on a flat road. Yet, we are now recommending that it be done on all projects. Why?
• A: This action is employed were the soils are mainly fines and the soil lacks gravel and grading, on hills as a precaution, should it rain within seven days of construction.  If the grading of the soil is ideal this is just another added cost to low cost roads.
• Q: There is a lot of sediment in the bottom of the drum, why?
• A: Endurazyme is shipped abroad in a highly concentrated form and is fresh from the factory, it should be shaken a little prior to use. There is nothing wrong with the product and even if not shaken it is full strength, the sediment is a result of the culture and fermentation
• Q: We are still getting dust from the road after 3 weeks, why?
• A: The soil used is low in clay content and high in silt fines, a proportional mix design should have been used. Remember clay is the binder and that Endurazyme only works on the clay particles within a soil / gravel mix.
• Q: It rained within seven days of construction and the road got very Slippery and wheel tracks could be seen?
• A:  This has do with good work practices during construction which include, rain  during construction, correct drainage and profile ( see notes below ).
• Q: Which roller is best, can you clear this question up?
• A: All rollers have there place in the construction process and they all be used were possible in there role. (Please see notes below on compaction)
• Q: It has been said by Brian that they only roll in a thin layer of gravel if the   road is on a hill and that is it not necessary on a flat road. Yet, we are now recommending that it be done on all projects. Why?
• A: This action is employed were the soils are mainly fines and the soil lacks gravel and grading, on hills as a precaution, should it rain within seven days of construction.  If the grading of the soil is ideal this is just another added cost to low cost roads.
• Q: In your E-book, there is a table showing that 40 % clay gives about
  17 plasticity index. Wouldn't 40 % normally give a far too slippery
  and "crocodile-cracking" surface ?
• A: One must remember that testing is only carried out on the soils passing the 425um sieve, the total equation and therefore the overall percentage would be less, "crocodile-cracking" surface is caused only through high moisture content at compaction
• Q: Would you say that an increase of the Plastic Index from say 8 to say 15, has any specific advantages towards the end-result ?
• A: Yes! if you look at our grading chart the ideal is a plastic index of 17% backed up by a good grading of silts ,sands and gravel to add to the overall strength. The clay content plus Endurazyme are the cement that binds the mass together.
• Q: When you are making your own calculations on clay-addition on a
  job, do you normally work on the basis weight/weight and thus use 
  different bulk densities on clay and rest respectively to come up with
  the % clay necessary ?
• A: No we use a proportional mix design that we have put together over the years and update from time to time.( this spread sheet is available on request)

Drainage: Table drains and culvert design are in the hands of the design engineer and any fault in this area is not the fault of the product or the workers on the day.
Delamination: Is caused by layers of soil being compacted at different moisture contents and the use of heavy steel drum rollers usually on vibration mode.  This will happen no matter what is used from plain water to stabilisation product including lime and cement. Moisture content must be controlled at all times from wetting out the base to layers and final trim. Good work practices. (See profiles click here)
 

Compaction: This is a large subject and has many different viewpoints held by academics and engineers worldwide.  Almost all of these views are held and vented on non plastic soils and the teaching in general is to exclude clay from any construction were possible. For clay areas were highway construction is in progress all forms of compaction will be used and mostly in this order: Sheep's foot, steel drum and rubber tyre.
For more information I suggest the links below,  on Google.com there are 76,000 pages.
Compaction1

Compaction2

Compaction3

You must be online to activate the above links.

Compaction: Endurazyme and dirt road construction:
Dirt road construction is low cost construction and is the finished product, it does not usually come under the same strict design control as highways. Good work practices must still be adhered to at all times. 
Ideally all three roller types should be used during construction but excellent roads have been constructed using nothing but the steel drum roller and the water cart used as the rubber tyre roller.  The point here is that a steel drum roller will bridge soft spots but the wobbly tyre roller will not, potholes can be the result of poor compaction, rubber tyre rollers give a better finish to fine soils and dehydrate the moisture far more rapidly. ( Heavy traffic will accelerate the cure and seal the surface) 
 

Rain: If rain is expected on the day of construction use the local knowledge available to gauge the extent of rain that is normal and use as little water as possible to apply Endurazyme to the soil. Use the rain instead of the water truck and continue to work the soil ready for compaction, it is most important that the road is fully compacted prior to leaving the site.  If heavy rain suddenly appears from nowhere and you are in the middle of construction, simply grade all treated soil into one windrow and lay out later or when the rain stops, upto seven days after application of Endurazyme. On returning make sure the base has a moisture content equal to the treated soil to be laid so that delamination does not occur, Endurazyme at 1000 to 1 in the water truck during this procedure will help ensure sufficient bonding.  Nobody can change the weather but good work practices and knowledge of how Endurazyme works will always get a great result. Endurazyme has three main elements, the one of concern were moisture is in abundance (rain) is the very sophisticated surfactants in the formulation.  These surfactants are used to get into the clay based soils and take with it the other two very important elements, they also render the water ten times wetter than water alone and increase the drying time to allow for a slow cure to eliminate cracking and shrinking. So you can see that if you then add more moisture you are headed for major problems.  Conclusion: good profile, compaction and finish are paramount and then all rain will end up in the table drains were it should be.
If rain is forecast do not start the construction.

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Brian Jackson Sunday, 08/06/06