Too bad NASA didn't use cenospheres rather than square tiles on the space shuttle. There are some cenospheres located in the shuttle nose cone but that technology was developed over 20 years ago. Recent developments make high strength semi-rigid heat resistant heat shields from bonded cenopsheres. Also, Bob Young (below) recently developed a coating for flyash LOI that renderes ash technically viable for environmentally friendly use (concrete, etc) with up to 15% LOI. Most states limited the allowable LOI to about 6% because of technical limitations eons ago when the laws were written.
The most advanced cenosphere research can be found at website:
One technical expert is Robert D. Young, PhD, Penn State
e-mail: rdy@satx.net
The physical collection of the cenospheres is accomplished by Brad Simmons, President, Simmons Cenospheres, Hwy 11, Abingdon, Va. Attn: Cherokee Construction Company
Other sources include American Coal Ash Association:
Phd Arijit
Or search for cenospheres on website:
Improves fossil combustion efficiency with co-invented cost effective combustion monitor. Reduces NOx, CO, LOI, opacity. haclift@yahoo.com