crushed glass as thermal mass

OK Seems an odd topic to post on whats been the hottest day of the year so far here in the UK but............

I've got loads of broken glass to get rid of and I wondered whether it could be used as thermal mass in a stove I'm just starting now ............. yeah I know stupid time of year to instal greenhouse heating 

Much though I'd love a proper rocket stove it'll actually just be a normal brick surround stove filled with ...... crushed glass  ?

Its that or landfill because the useless recycling around here won't take sheet glass 

Thanks for any advice

Roger