In a message dated 13/03/03, beezaur@.......... writes:

> I'm aiming for a matrix supported composite of (mostly) quartz sand and 
> portland cement.  

Hi Scott,

       Is the curing rate and the final properties significantly temperature 
dependant? 

       Are the properties of the top surface any different from the moulded 
surfaces?

       Can you inhibit surface micro cracking by coating the inside of the 
mould with carbon or other fibres? Alternatively, can you post coat with 
carbon or glass to any advantage? 

       Regards,

       Chris Chapman      
In a message dated 13/03/=
03, beezaur@.......... writes:



I'm aiming for a matrix sup=
ported composite of (mostly) quartz sand and portland cement.  <=
FONT  COLOR=3D"#000000" SIZE=3D3 FAMILY=3D"SANSSERIF" FACE=3D"Arial" LANG=
=3D"0">



Hi Scott,



       Is the curing rate and the final pr=
operties significantly temperature dependant?=20



       Are the properties of the top surfa=
ce any different from the moulded surfaces?



       Can you inhibit surface micro crack=
ing by coating the inside of the mould with carbon or other fibres? Alternat=
ively, can you post coat with carbon or glass to any advantage?=20



       Regards,



       Chris Chapman    &nb=
sp;