国际会议报告ppt课件

1、Effect of MgO on the Composition, Structure and Properties of Alite-Calcium Strontium Sulphoaluminate Cement. Report syllabus.IntroductionCalcium strontium sulphoaluminate mineral (3-X) CaOXSrO3Al2O3SrSO4 C1.5Sr2.5 A3 Portland cement Alite-calcium strontium sulphoaluminate cement (AS cement) Lower c

2、alcination temperatureHigher SO3 contentThe disadvantageous influence of MgO can be reduced.Introduction.ExperimentComposition /%AluminiumratioSiliconratioSaturation coefficientof limeC3SC2SC3AC4AFC2.75B1.25A3 59.2414.227.499.992Table 1 Mineral composition of the clinkerThe Portland cement

3、 with the addition of 4% and 5% MgO were synthesized for comparisonContents of MgO 1%，2%，3%，4%，5%，6%，7%.Results and discussionNo.w(MgO) /%w(f-CaO) /%Compressivestrength /MPaExpansionratio /%3 d28 dA000.4855.296.70.147A110.4162.299.80.138A220.3864.3103.60.171A330.4363.2101.20.240A440.4561.897.90.373A

4、550.4660.196.00.428A660.5351.289.50.738A770.5943.973.71.373S440.7250.487.90.556S550.7849.688.30.692Table 2 Effect of MgO content on the cement performances Influence of MgO on the Properties of Cement. C3S C1.5Sr2.5 A3 C2S C4AF C3A Fig. 1 X-ray diffraction (XRD) patterns of clinkers XRD analysis of

5、clinkers. SEM-EDS analysis of clinkers Fig. 2 SEMEDS of silicate minerals in clinker A2(a) SEM of A2 clinker (b) C3S at point 1. (a) SEM of A2 clinker(b) C1.5Sr2.5A3 at point 2 Fig. 3 SEMEDS of C1.5Sr2.5A3 in clinker A2.(a) SEM of A7 clinker (b) C1.5Sr2.5A3 at point 2 Fig. 4 SEMEDS of C1.5Sr2.5A3 in

6、 clinker A7.Petrography analysis of clinkersA0A2S5A5Fig. 5 Light micrographs of clinkers.Distribution of MgO in the ClinkersTable 3 Distribution of MgO in the ClinkersNo.w(MgO)/%Distribution w/%MgO in calcium silicateMgO in glass phasef-MgOMgO in intermediatephaseA220.830.240.320.61A441.450.271.031.25A551.520.321.561.60A771.7