Sandard specifications for crushed STPP (average rate of hydration)
Designations | Units | Specifications |
Phase I |
% | 20 – 45 |
Rate of hydration (ROH) : |
°C |
85 - 90 88 - 95 |
(P2O5) Content |
% | 56 ± 0.5 |
STPP content |
% | 94 mini |
Water content |
% | 0 - 1 |
Water insoluble materials |
% | 0.1 maxi |
Particle size : |
% |
0 5 maxi 75 mini |
pH (1% solution) |
--- | 9 - 10 |
Whiteness |
--- | L = 95 mini (Hunter L.a.b) |
Paulte density |
Kg/l | 0.7 – 1.0 |
Trace metals : |
ppm |
5 maxi 5 maxi 5 maxi 5 maxi 1 maxi 5 maxi 1 maxi 1 maxi 5 maxi 50 maxi 250 maxi |