= Concrete Planet =
=== Robert Courland  2011  978-1616144814 ===
=== booknotes ===

 . Claims concrete very early discovery, used for temples
  . Not convincing
 . Joseph Davidovits 
  . Pyramids concrete, book says nonsense
  . Geopolymer concrete
 . Reinforced concrete 
  . Starts out alkaline, then moisture seeps in
  . Rebar oxidizes, volume increases, breaks concrete
  . NOT fireproof, surface bakes out and powders
   . Collapsed buildings 1906 SF quake
  . High strength concrete - fast cure, 70% stronger, but cracks easier and corrodes faster
   . Normal 21MPa, High Strength 31-37MPa, in 7 days 
   . Service Life 50 years, average age 42 years
   . Partial repair, $2.2T
  . Sewage as corrosive as seawater
  . Sacrificial anodes, aluminum or magnesium
  . Active cathodic protection adds 15% to bridge cost 
   . too much and makes hydrogen
  . Glass fiber polymer rebar
   . Hard to shape
   . RF transparent
  . Carbon fiber rebar
  . Aluminum bronze cheaper than "stainless" steel
  . Roman structures, Hockney viaduct has no rebar, still stands
 . Concrete shrinks while setting, and changes volume with moisture
 . Megatons of CO_2_ from kilning lime (Calcium Carbonate into Calcium Oxide )
  . Second largest source after power plants
 . Edison concrete houses and appliances
 . Three Gorges - 27 M cu meters
 . Sydney Opera House - Jørn Utzon Denmark

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=== Other sources ===
 . http://en.wikipedia.org/wiki/Properties_of_concrete
 . 2,400 kg/m³
 . Portland cement 8to12 microstrains/°C)(8-12 1/MK)
 . Reactive Powder Concrete, up to 800MPa lab, 200MPa deployed
  . Steel wool fibers - yikes!

|| Portland Cement ||  8    to 12  ||
|| Quartz          ||  0.77 to 1.4 ||
|| Glass           ||  4    to 9   ||
|| Carbon Fiber    ||  0.54        ||
|| Steel           ||  13.0        ||
|| Stainless Steel ||  10   to 17  ||
|| Aluminum Bronze ||  16.2        ||
 .