Mackenzie’s Smart Surface® service provides a proven, fast and innovative binding solution that delivers the most efficient and sustainable option for surfacing and ensures best value, in the short and long term.
Another contract we have carried out recently was on behalf of South Lanarkshire Council which was project managed by Paths for All.
This was an opportunity to upgrade a section of Clyde Walkway deep in the Clyde Valley, we upgraded approximately 1.3km of rural path.
The key challenge within the project was the lack of access for conventional plant, the gradients, the heavily dense vegetative state and the amount of water that the path was holding.
Using conventional construction methods of importing material would never have been cost effective and could not have been completed to budget using traditional path construction processes. However, it was a perfect fit for our Smart Surface® service
As a trusted, established and progressive partner, our approach ensured strong partnership working with both Paths for All and other key project partners in order to ensure we met their collective needs and requirements as efficiently and safely as possible.
We also hosted the following delegates from the following bodies to witness and experience the smart surface process, the feedback was encouraging by all in attendance. Attendee’s included:
Smart Surface® allowed us to gain access through the smallest of channels and the near elimination of imported material allowed us to successfully complete the works to the satisfaction of the client.
The path was success fully restored and in use the next day and the completed path blends perfectly into the landscape, supporting regular use for many years to come with almost no maintenance required.
The ability to limit importation of quarried aggregate material, by utilising existing path substrate, was an important consideration in choosing Mackenzie Construction’s Smart Surface® however we were also looking to maximise value for money and ensure that any finished surface was going to be fit for purpose for many years to come. Steep gradients, surface damage from motorbikes and restricted resources for ongoing maintenance meant that more traditional path surfacing materials would not have provided an effective solution and tarmac was not an option due to cost and landscape fit. The finished path at Clyde Walkway has typically surpassed expectations and, throughout the development and implementation of this project, the project partners were also hugely impressed by the commitment and professionalism shown by the Mackenzie Construction team to deliver the highest quality of end product. We have every confidence that Smart Surface® will provide those involved in delivering and maintaining our outdoor access and active travel routes across Scotland with an alternative and genuinely effective solution.
What is Mackenzie’s ‘Smart Surface®’?
Mackenzie Construction’s ‘Smart Surface®’ service provides a proven, fast and innovative binding solution that delivers the
most efficient and sustainable option for surfacing and ensures best value for money in the short and long term.
The service is applied using the safety, integrity and efficiency standards that Mackenzie Construction are renowned to
deliver in the industry and utilises our expert knowledge and experience to deliver an innovative, sustainable and valueadding
solution which makes the most of your time and materials.
What is the active ingredient, Ecoproactive®?
Ecoproactive® is an inorganic latent hydraulic binder for soil stabilisation applications and pavement layers.
Performance under freeze/thaw conditions
The stabilised material performs well under freeze/thaw conditions, achieving a strength greater than N/mm2. It is
therefore not deemed to be susceptible to frost heave. This applies even if the constituent parts of the stabilised material
may themselves be frost susceptible.
Application parameters e.g. temp, moisture (from rain and within ground)
Application is not advised where the temperature is 1°C and falling. Ideal conditions would be 5°C and rising.
A pre-application laboratory test (Proctor Test – the optimal moisture content at which any given material will become
most dense and achieve its maximum dry density) will calculate the MDD (maximum dry density), NMC (natural moisture
content) and OMC (optimum moisture content); providing the target figures for the application. To achieve optimum
compaction results, an OMC plus 1% is advisable; making additional allowance for some evaporation that will occur
when working with the stabilised material and compacting to desired falls/surface profile
Indicative cost per square metre for Ecoproactive®
Not unusually, this will vary on a site per site basis and will fluctuate due to access restrictions, type and size of plant, site
security requirements, suitability of existing route/path material, requirement for importation of stone to add volume
(typically 20mm scalpings), percentage of Ecoproactive® powder required and surface application e.g. 6mm grit (if any).
MacKenzie Construction Ltd. are continually developing procedures that will refine and reduce the output cost within a
wider range of application.
Application of product to small areas (e.g. <50sqm)
Ecoproactive® is typically not designed for this type of application. That said, it is possible to dry batch clean stone with
the Ecoproactive® powder; akin to more traditional patching repair work. This process of dry batching limited qualities is
being undertaken on the Clyde River Walkway to infill treads on some newly constructed ramped timber sleeper steps.
What is the moisture content/absorbency/porosity of the material?
Refer to Proctor test below:
|Rapid Absorption Test||24 hours less than 1%|
|Rapid Absorption Test||48 hours less than 1.5%|
|Rapid Absorption Test||72 hours less than 1.75%|
|Capillary Absorption Test 7 days||less than 0.3mg/square millimetre|
|Capillary Absorption Test 28 days||less than 0.50mg/square millimetre|
|Permeability||1.45 x 10-9|
How suitable is it for the application of surface layers or coatings?
Suitable size for further finish application of 10mm bituminous macadam, spray and chip application. HRA sand carpet
finish all with application of tack coat of bituminous emulsion before applications.
Strength of path edges? Paths typically need a wider base layer to protect the surface layer from breaking
along the edges so how does this material perform without that formed base layer?
Ecoproactive® stabilisation process does not preclude the use of sound engineering principals. It needs to have minimum
150mm overlap for compaction purposes or the edge will roll away and you will not meet profile requirements for wearing
course applications if no side restraining i.e. kerb or timber edging in place. If used as a base course or a sub base the
material will be held in position by the adjoining material bed.
Will pernicious weeds penetrate this material and will weed growth impact on edge stability?
If properly compacted to 100% MDD, there will be no opportunity for organic intrusions as there will be no air voids, or
moisture, available for plant growth.
Life expectancy of the material/path under normal conditions?
Under normal path user conditions, the application will have an expected lifespan of 20+ years.
How easy is it to form a camber to the path surface?
Camber is easily formed but, typical will most path construction and depending on the designed width, can be problematic
to roll and may leave crossover roller marks and/or result in the crown being flattened. Optimum surface compaction is
achieved using a 120 roller which can flatten the camber unless the formation layer is sufficiently robust and/or additional
sub-base strengthening has taken place e.g. additional infill, geotextile/geogrid.
It is suggested that the initial base material rotovation; application of Ecoproactive® stabilising powder; addition of water
to the mix (where required); further rotovation; surface profiling and final compaction should take place from low to high
side of the path. Experience shows that this gives the best finish results and typically eliminates any roller marks.