Asphaltic concrete has been used as waterproofing core in embankment dams, since 1948.
The new Z3, the followup to the six-month old Z2, and the Z3 Compact, which replaces the Z1 Compact released 12 months ago, both feature powerful quad-core processors and waterproof housings.
One test involves forming a barrier around the top of the concrete core sample, after the sides are waterproofed; water is poured into the barrier on top of the core sample.
In 1936 the Ensign-Bickford Company, Simsbury, Connecticut, the American manufacturers of cordeau, developed Primacord, based on French patents and constituting a core of PETN covered with various combinations of textiles, waterproofing materials, and plastics.
Apple hasn't yet shown much interest in waterproofing its smartphones and tablets, though other smartphone makers like Sony have made it a core component of their hardware.
Their basic gear includes a transect grid, a small camera, sampling bags, waterproof charts, line reels and sometimes even an underwater capable power drill which is used to extract core samples from the coral.
Core-formed concrete, precast concrete panels, and ICF, or Insulated Concrete Form wall construction is essentially more waterproof than most other construction methods to begin with, meaning that it rarely needs additional waterproofing attention.
