Abstract:
Introducing New (Nano) Modified Emulsions (NME) into the road industry has been shown
to have considerable advantages in terms of road pavement durability and the delivery of
climate-resilient, cost-effective road infrastructure. However, the introduction of new
stabilising agents for granular materials has the potential to also open the door to the so-
called “snake oils” or sub-standard stabilising agents with resultant dire consequences to
perceptions regarding the introduction of new technologies for the improved utilisation of
naturally available granular materials in the road environment. Procurement rules often
prevent authorities from specifying any specific product. However, the industry can specify
“End Product Specification,” where the contractor can use any supplier with products that
meet basic engineering material and practical specifications beneficial to road projects.
This paper discusses some basic requirements, introducing typical clauses that should be
incorporated into an “End Product Specification”. To ensure successful application in
practice, practical aspects related to material stability in harsh environmental conditions,
water quality, material quality control test procedures, reworking of materials in case of
failures and equipment requirements as related to the application of NME materials should
all form part of such “End Product Specifications”. The primary purpose of these
specifications is to reduce risks to road agencies, ensuring that sub-standard stabilising
agents are not introduced under the cover of NME.
