Benefits and Application
GB-HRM is a manufactured pozzolanic mineral admixture that significantly enhances many performance characteristics of cement-based mortars,concretes and related products. GB-HRM,derived from purified kaolin clay,is a white,amorphous,alumino-silicate,which reacts aggressively with calcium hydroxide to form compounds with cementitious value.Used at 5-15% replacement of cement by weight,GB-HRM will be favorable for increasing strength and reduce permeability.Meanwhile,it will also effectively reduce efflorescence and degradations caused by alkali-silica reaction(ASR) in concrete. Description:A white,manufactured,amorphous alumino-silicate with excellent physical,chemical and pozzolanic properties.Conform to ASTM C-618,Class N Specifications for Natural And Calcined Pozzolans.
Typical Physical Properties
| Item |
GB-HRM98 |
| Brightness(T457) |
86%min |
| AverAverage particle Size (micron) |
1.2max |
| Lime reaction value （MgCa(OH)/g |
1300min |
| Pozzolanic activity index (28days) % |
120min |
| The specific surface area (m2/g) |
22min |
| pH |
5.5-8 |
| Moisture (%) |
0.5max |
| L.O.I. |
1.0%max |
| Water requirement ratio (%) |
115max |
| Bulk density: Loose/Tamped (kg/m3) |
250/400 |
Typical Chemical Properties
| SiO2(%) |
Al2O3(%) |
Fe2O3(%) |
TiO2(%) |
CaO(%) |
MgO(%) |
CuO(%) |
K2O(%) |
Na2O(%) |
MnO(%) |
| 52+/-2 |
45+/-2 |
0.50max |
1.5max |
0.4max |
0.2max |
0.004max |
0.05max |
0.15max |
0.004max |
