Science

A BRIEF REVIEW

Nanosilica Modified Asphalt


A Decade of Science

Although GoNano is the first and currently only North American company offering a nanotechnology solution to enhance, protect and increase lifespan of asphalt shingle roofs, the science of nanosilica modified asphalt pavements spans a decade back and benefits from hundreds of scientific studies and testing.

Scientific Evidence

 Major scientific institutes have been studying and testing the integration of nanosilica on asphalt pavements with important scientific evidence.

Durability

The scientific literature forms near consensus: nanosilica solutions modify and enhance asphalt properties, therefore significantly increasing anti-aging performance and durability.

Life-Cycle Costs

 Nanosilica solutions represent therefore an important technological innovation bearing the potential of reducing the life-cycle costs of asphalt roads and, now, of asphalt shingle roofs with ProNano’s innovative and exclusive nanosilica solution.

Only Company

GoNano is the first and only North American company to have tested its residential roof protection technology with a major standards organization.

Official Impact Resistance Standard

GoNano’s shingle nanotechnology was tested under the official North American impact resistance standard used by standards organizations for both shingle manufacturers and insurance companies. 

Conclusions of the Test 

#1. GoNano transforms Class 1 shingles into Class 3, with one treatment #2. GoNano transforms Class 1 shingles into Class 4, with two treatments 

Shingle Class Transformation 

GoNano not only adds 10 to 15 years of additional lifespan to an asphalt shingle roof, it also transforms common Class 1 roofs into the highest hail resis tance Classes (3 and 4).

Durability

It is scientifically established that, through enhancing aging factors of asphalt durably (flexibility being one of them), the impact resistance Class transfor mation generated by GoNano is durable and long lasting 

A Fraction of the Cost

GoNano’s technology represents a major technological innovation that transforms current and common Class 1 roofs into hailstorm resistant roofs (Classes 3 and 4), though only at a marginal fraction of the cost of hailstorm resistant shingles themselves (Classes 3 and 4). 

Residential Insurance Cost Reduction

GoNano reduces substantially risks of hailstorm damages, helps mitigate climate change's increasing impacts on home insurance costs, and help both homeowners and insurance companies significantly reduce one of the biggest insurance weather expenses. 

Climate Change 

According to the Institute for Catastrophic Lost Reduction's latest report, "Climate change will worsen future hailstorms, making impact-resistant shingles more valuable and the yellow area bigger". 1 

 

1 Reference: https://www.iclr.org/wp-content/uploads/2022/04/Benefit-cost-analysis-of Impact-resistant-asphalt-shingle-roofing2.pdf

Additional lifespan 

 With one treatment, GoNano adds 10 to 15 years of additional lifespan to an asphalt shingle roof or an SBS membrane roof. 

Human Health and Ecology 

GoNano is safe for both the environment and human health

Evaluation of Asphalt Binders Modified with Nanoclay and Nanosilica 1 

"During last decade, researchers’ interest in nanotechnology applications, particularly in the field of pavement materials, has been increasing. (...) Finally, the Dynamic Shear Rheometer (DSR) results showed obvious improvement in the performance grade leading to higher resistance to permanent deformation.″ 


Effect of nanosilica particles on polypropylene polymer modified

increased significantly by adding SBS/nanosilica nanocomposite" 


The fatigue behavior of SBS/nanosilica composite modified asphalt binder and mixture 3 

"The results showed that the fatigue life of asphalt binder and asphalt mixture were 


Analysis of interfacial adhesion properties of nano-silica modified asphalt mixtures using molecular dynamics simulation 4 

"The results show that oxidation aging promotes the asphaltene aggregate on the surface of the silica aggregate, while the effect of nano-silica is reversed. (...) The presence of nano-silica reduces the susceptibility of asphalt mixture to water damage or sodium chloride solution erosion." 

 

Rheological investigation of asphalt binder modified with nanosilica 5 
"The addition of nanosilica enhanced the rutting potential of the asphalt binder. Fatigue evaluation using Linear Amplitude Sweep test showed that incorporation of nanosilica arrests the micro crack nucleation and therefore enhanced the fatigue performance of asphalt binder. (...) ." 


Laboratory evaluation of composed modified asphalt binder and asphalt mixture performance

The asphalt performance tests flexural four point beam fatigue test, indirect tensile strength, indirect tensile stiffness modulus (...) This indicates that nanosilica particles have significant effect on improving the performance properties of polymer modified binders. Also, the result reveals that thermoplastic polymer polypropylene with nanosilica particles when used as bitumen modifiers improve the performance and 

durability of asphalt mixtures" 


mixture containing nano-silica/rock asphalt/SBS 6 

"Comparing these tests results with the properties of unmodified asphalt mixture, nano-silica and rock asphalt cause an improvement in pavement performance. nano silica/rock asphalt/SBS modified asphalt mixture had higher temperature stability, low-temperature cracking resistance, moisture susceptibility and durability than 5% SBS modified asphalt except the similar fatigue life. Furthermore, economic analysis indicated that the nano-silica/rock asphalt/SBS modified asphalt mixture had higher cost effectiveness." 


Performance evaluation of nanosilica-modified asphalt binder 7 

"It was found that adding nanosilica to asphalt binder improves its rutting resistance. Results of all the rheological approaches showed that resistance to permanent defor mation increases with the addition of nanosilica. Nanosilica-modified binders have high resistance to oxidative ageing."


To go further: pressures of climate change on the insurance industry How climate change is leading to bigger hailstones: 

https://www.bbc.com/future/article/20220314-how-big-can-hailstones-grow#:~:text=Destructive%20hail%20triggered%20by%20climate,energy%20losses%20from%20wind%20farms 


A Benefit-Cost Analysis of Impact-Resistant Asphalt Shingle Roofing 

"Climate change will worsen future hailstorms, making impact-resistant shingles more valuable and the  yellow area bigger" 

https://www.iclr.org/wp-content/uploads/2022/04/Benefit-cost-analysis-of-Impact-resistant-asphalt shingle-roofing2.pdf



Climate Change Ranks as Top Concern for Insurers, Replacing Pandemic. https://www.insurancejournal.com/news/international/2021/09/29/634207.htm 


The $5 trillion insurance industry faces a reckoning. Blame climate change. 

https://www.vox.com/22686124/climate-change-insurance-flood-wildfire-hurricane-risk 


Climate change and P&C insurance: 

The threat and opportunity (...) Business models must adapt. https://www.mckinsey.com/industries/financial-services/our-insights/climate-change-and-p-and-c-insu rance-the-threat-and-opportunity 


The climate crisis is here. Are insurance companies keeping up?

https://www.marketplace.org/2021/08/06/the-climate-crisis-is-here-are-insurance-companies-keeping-up/ 


Climate risks for insurers: 

Why the industry needs to act now to address climate risk on both sides of the balance sheet. 

https://www.spglobal.com/esg/insights/climate-risks-for-insurers-why-the-industry-needs-to-act-now to-address-climate-risk-on-both-sides-of-the-balance-sheet

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