Integrating Pykrete and Daytime Blackbody Emitters

During World War 2 a shortage of steel led inventor Geoffrey Pyke to suggest to the British government the development of an ice based carrier to aid in the war effort.  The  carrier was made from simple water ice and deemed too weak to serve as a proper launching platform.  The need for a stronger cheap material to make into a carrier led to the development of what is now called pykrete, ice that has been mixed with sawdust, cheap to manufacturer and much stronger than simple water.  By 1943 government interest waned on the development of the ice carrier as the tide of the war shifted in the favor of the Allies and pykrete became a historic curiosity.  

A big weakness of pykrete as a material for fabrication stems from its need to be kept cold to maintain its strength, while steel and concrete are more expensive they benefit from working in temperatures above freezing.  With research and development into daytime blackbody cooling technologies, pykrete might have its day in the sun at last.  New research into blackbody cooling surface coatings have already acheived materials that according to papers, are affordable to manufacture and provide the ability to cool surfaces by 8.2 degrees C (about 15 degrees F) from ambient air temperature.  By combining these passive coolilng films on the outside of a pykrete structure, it would be conceiveable to create a floating iceberg capable of surviving year round (in the right latituteds).

These permanent ice masses could have tremendous applications at extreme latitudes, providing a working platform for weather stations and communications relays.  The design of the ice platform would be complicated to say the least, it would be unlikely that you could make a year round ice block just by making a cube of pykrete and wrapping it the cooling film.  The corrosive nature of sea water and limited surface area would minimize the benefit of having a cooling surface coating in the first place.  The most likely design (broad strokes) would be a large mass of pykrete, internally permiated with tunnels for refrigerants to be circulated through the system to keep it from melting.  The side of the platform that would be exposed to open air would be covered in a complex topology of cooling fins, designed to maximize the surface area of the system capable of disipating as much heat as possible. 

Realistic use cases:

Long term research station for you know northern scientsits

Radio relay:  create a network of these platforms above the Arctic circle and use them to connect the various parts of Europe, North America, and Asia

Platforms for telescopes  As the North Pole only needs to compete with Santa Clause's workshop with respect to light/radio polution, these pykrete platforms could be used to make a really massive array of radio dishes to get a unique perspective on the galaxy.

(the really real option)
Russian missile launch platforms, why waste a fully fledged submarine when you could make a passive block of ice with a radio receiver awaiting launch codes.

Pros
The artificial land masses could be used, in a small way, to shore up icemasses in the Arctic and Antarctic, their material properties and cooling characteristics could help other ice masses stabalize year round



Cons
Limited range of use.  By requiring such relatively low temperatures to remain structurally sound there would be a relatively small number of regions on the planet where you could make these platforms