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support287323 12 views 6 slides Sep 11, 2024
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About This Presentation

Explore the significant reduction in greenhouse gas emissions and the bolstering of road network resilience through the utilisation of advanced technology. Our innovative Renolith nanotechnology leads to more durable pavements.

Climate-smart roads are now a realityโ€”cost-effective and sustainable....


Slide Content

Australia is committed to reducing GHG emissions and improving the resilience
of infrastructure to cope with climate change. Mature and affordable technology
is available to deliver on this commitment.

Road network resilience can be
greatly improved, and GHG emissions
radically reduced, by adopting
appropriate technology in
infrastructure works. The optimal
climate-smart pavement engineering
approach is in-situ stabilisation using
low-embodied energy cementitious
binders, enhanced by nanotechnology
(aka Nanoengineered Geopolymers).
There are 3 simple principles
involved:
Stabilise
Enhance
Optimise

In-situ stabilisation techniques have advantages over alternates,
saving costs, time, energy use and GHG emissions related to:
Excavation of the existing materials
Trucking materials off site
Dumping or disposal of excavated materials
Quarrying replacement materials
Trucking replacement materials to site
The embodied GHG emissions for a typical suburban pavement rehabilitation project were reduced by over
85% by using a stabilised basecourse instead of an unbound granular basecourse (Smith & Vorobieff, 2007)
Slow setting binders (e.g. 85% GGBFS / 15% lime) have a lower carbon footprint than GP/GB cement and
typically yield better results.
Austroads AGPT04D-19 states: โ€œThe use of stabilisation technology for stabilising and recycling materials for
pavement construction and maintenance is widely accepted as a cost-effective method of improving long-term
performance and reducing whole-of-life costs of modern, heavily-trafficked pavementsโ€ฆ[but]โ€ฆCracking is the
primary and predominant distress type of cementitiously-bound materials.โ€
STABILISE
01.

Renolith nanotechnology prevents cracking problems in cementitiously
bound materials, and greatly enhances the material engineering properties.
A small quantity of Renolith 2.0 admixture (5% w/w binder) can improve
the pavement life (traffic capacity) by 3x-70x and greatly reduce the risk of
potholes and other water-induced premature failures.
02.
ENHANCE
This results in a significant reduction in whole-of-life GHG emissions by
reducing the maintenance and rehabilitation impost.

Renolith allows the pavement designer greater flexibility to optimise
for sustainability. Renolith greatly reduces the susceptibility of
cementitiously stabilised material to shrinkage cracking, so upper
limits on pavement strength can be relaxed. This enables a thinner
base layer and thin wearing course. It also enables marginal or poor
material to be utilised in the basecourse.
If the in-situ material is very poor, aggregates may be added to achieve
the desired plasticity and particle-size distribution (PSD) in the
material to be bound (MTTB). Local gravels or recycled concrete
aggregates (RCA) are typically used. In principle, pavement net
embodied emissions could be reduced below zero by using carbonated
RCA, which can sequester up to 50 kg CO2/tonne.
03.
OPTIMISE

These principles can be applied today using extant specifications & standards, using technology proven
over decades and millions of square metres of pavements. Climate smart roads are possible and
affordable.
In fact, a significant reduction in both construction costs and whole-of-life costs is achievable.
+61 485 931 486 https://renolith.com.au [email protected]