Compressive Strength test results of cement, which is milled by the complex «Activator Ñ500».Portland Cement Compressive Strength Specifications in MPa and mesh analisys. |
| № | Cement | Cement input | Cement stored in 24 hours | Cement stored at 2 weeks | Growth of cement strength after grinding | Cement strength loss after stored for 2 weeks | Mesh analisys of milling cement |
| Compressive strength at 4 weeks, Mpa |
| 1 | Cement CEM II 32,5N | 41,2 | 54,9 | 53,0 | 35% | 3% | 4%>80μ; 96%<80μ |
| 2 | Cement CEM I 42,5N stored for 1,5 years. | 40,2 | 59,8 | 58,8 | 50% | 2% | 7%>80μ; 93%<80μ |
| 3 | Clinker, Iskitim-cement factory | - | 47,1 | 47,1 | - | 0% | 8%>80μ; 92%<80μ |
| 4 | Cement blend (1): CEM I 42,5N + fly ash 50% : 50% | - | 41,2 | 35,3 | - | 10% | 8%>80μ; 92%<80μ |
| 5 | Cement blend (2): CEM I 42,5N + ground granulated slag 50% : 50% | - | 35,3 | 34,3 | - | 2% | 11%>80μ; 89%<80μ |
| 6 | Cement blend (3): CEM I 42,5N + ground granulated slag precursory milling 50% : 50% | - | 49,0 | 49,0 | - | 0% | 3%>80μ; 97%<80μ |
|
| Compressive Strength Specifications of Cements is measured on GOST of Russia 310.4-81. |
| The table shows the results of the activation of cement - cement ¹1 and ¹2. Compressive Strength of PC CEM II 32,5N (cement ¹1 in table) before milling was 41,2 Mpa. After activation (milling) compressive strength of the PC is already 54,9 Mpa. Thus, the increase in strength at milling is 35%. |
| PC CEM I 42,5N (cement ¹2 in table) has lost compressive strength when stored for 1,5 years, which was 40,2 Mpa. After milling (activation) the compressive strength of the cement is already reached 59,8 Mpa. Thus, the increase in strength at milling is 50%. |
| Also, the table shows the results of co-milling of cement mixtures, consisting of cement in Table ¹3 with fly ash (a mixture of cement 1) and with ground granulated slag (cement mixture of 2 and 3). |
