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Performance of sulphoaluminate-belite cement with high C4A3S content
Sulphoaluminate - belite (SAB) cements are an attractive class of low energy cements from the viewpoint of energy saving and less CO2 releasing into the atmosphere during their production. Their hydraulic activity, however, does not match that of the Ordinary Portland cement (PC) and needs improvement before they can be used on their own. Performance of SAB cement with 50.3 wt-% of C2S, 20.2 wt-% of C4A3S, 19.5 wt-% of C4AF and 9.7 wt-% of CS has been compared with that of PC having 67.6 wt-% of C3S, 5.1 wt-% of C2S, 9.2 wt-% of C3A, 10.6 wt-% of C4AF and 5.9 wt-% of CS, and blast-furnace slag Portland cement (BFSPC) containing 30 wt-% of blast-furnace slag. Mortars with the above cements and siliceous sand with the weight ratio of 1 : 3 and water to cement ratio of 0.5 were manufactured and 40x40x160-mm prisms were stored at 20 deg C for 90 days under 100 % R.H. - wet air conditions. The physical-mechanical properties (strengths, dynamic modulus ofelasticity), shrinkage reducing properties and passivation ability of SAB cement approach to those of BFSPC. With further improvement in the SAB cement quality through better understanding of their characteristics, a genuine competition between SAB cement and BFSPC can be expected in practice.
Performance of sulphoaluminate-belite cement with high C4A3S content
Sulphoaluminate - belite (SAB) cements are an attractive class of low energy cements from the viewpoint of energy saving and less CO2 releasing into the atmosphere during their production. Their hydraulic activity, however, does not match that of the Ordinary Portland cement (PC) and needs improvement before they can be used on their own. Performance of SAB cement with 50.3 wt-% of C2S, 20.2 wt-% of C4A3S, 19.5 wt-% of C4AF and 9.7 wt-% of CS has been compared with that of PC having 67.6 wt-% of C3S, 5.1 wt-% of C2S, 9.2 wt-% of C3A, 10.6 wt-% of C4AF and 5.9 wt-% of CS, and blast-furnace slag Portland cement (BFSPC) containing 30 wt-% of blast-furnace slag. Mortars with the above cements and siliceous sand with the weight ratio of 1 : 3 and water to cement ratio of 0.5 were manufactured and 40x40x160-mm prisms were stored at 20 deg C for 90 days under 100 % R.H. - wet air conditions. The physical-mechanical properties (strengths, dynamic modulus ofelasticity), shrinkage reducing properties and passivation ability of SAB cement approach to those of BFSPC. With further improvement in the SAB cement quality through better understanding of their characteristics, a genuine competition between SAB cement and BFSPC can be expected in practice.
Performance of sulphoaluminate-belite cement with high C4A3S content
Verhalten von Sulfoaluminat-Belit-Zement mit hohem C4A3S-Gehalt
Janotka, I. (author) / Krajci, L. (author) / Mojumdar, S.C. (author)
Ceramics Silikaty, Prag ; 51 ; 74-81
2007
8 Seiten, 9 Bilder, 7 Tabellen, 43 Quellen
Article (Journal)
Czech
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